refactoring, remove guard with fatal error

update podspec
Fixes #126 make closeAnimation and opentAnimation methods public
2018-04-02 10:15:04 +03:00 · 2018-03-27 16:37:34 +03:00 · 2018-03-27 16:35:20 +03:00 · 2018-03-27 16:32:23 +03:00 · 2018-03-27 15:57:42 +03:00 · 2018-03-26 15:22:58 +03:00
16 changed files with 678 additions and 721 deletions
@@ -0,0 +1 @@
+4.0
@@ -1,14 +1,13 @@
-osx_image: xcode8
+osx_image: xcode9.2
 language: objective-c

-env:
-  - DESTINATION="OS=10.0,name=iPhone 6s" SCHEME="FoldingCell" SDK=iphonesimulator10.0
-before_install:
-  - gem install xcpretty --no-rdoc --no-ri --no-document --quiet
-script:
-  - set -o pipefail
-  - xcodebuild -version
-  - xcodebuild -project FoldingCell/FoldingCell.xcodeproj -scheme "FoldingCell" -sdk "$SDK" -destination "$DESTINATION"
-      -configuration Debug ONLY_ACTIVE_ARCH=NO build | xcpretty -c
-  - xcodebuild -project FoldingCell/FoldingCell.xcodeproj -scheme "FoldingCell" -sdk "$SDK" -destination "$DESTINATION"
-      -configuration Release ONLY_ACTIVE_ARCH=NO build | xcpretty -c
+xcode_project: FoldingCell/FoldingCell.xcodeproj
+xcode_scheme: FoldingCell
+xcode_sdk: iphonesimulator11.2
+
+# SWIFT_VERSION: 4.0
+
+# whitelist
+branches:
+only:
+- master
@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
  s.name         = 'FoldingCell'
-  s.version      = '2.1.0'
+  s.version      = '3.0.5'
  s.summary      = 'UITableViewCell with folding animation.'
  s.homepage     = 'https://github.com/Ramotion/folding-cell'
  s.license      = 'MIT'
@@ -25,22 +25,10 @@ import UIKit

@UIApplicationMain
 class AppDelegate: UIResponder, UIApplicationDelegate {
-  
-  var window: UIWindow?
-  
-  func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey : Any]? = nil) -> Bool {
-    return true
-  }
-  
-  func applicationWillResignActive(_ application: UIApplication) { }
-  
-  func applicationDidEnterBackground(_ application: UIApplication) { }
-  
-  func applicationWillEnterForeground(_ application: UIApplication) { }
-  
-  func applicationDidBecomeActive(_ application: UIApplication) { }
-  
-  func applicationWillTerminate(_ application: UIApplication) { }

+    var window: UIWindow?
+
+    func application(_: UIApplication, didFinishLaunchingWithOptions _: [UIApplicationLaunchOptionsKey: Any]? = nil) -> Bool {
+        return true
+    }
 }
-
@@ -1,8 +1,12 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="11198.2" systemVersion="15G31" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" launchScreen="YES" useTraitCollections="YES" colorMatched="YES" initialViewController="01J-lp-oVM">
+<?xml version="1.0" encoding="UTF-8"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="13771" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" launchScreen="YES" useTraitCollections="YES" colorMatched="YES" initialViewController="01J-lp-oVM">
+    <device id="retina4_7" orientation="portrait">
+        <adaptation id="fullscreen"/>
+    </device>
    <dependencies>
        <deployment identifier="iOS"/>
-        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="11161"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="13772"/>
+        <capability name="Constraints to layout margins" minToolsVersion="6.0"/>
        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
    </dependencies>
    <scenes>
@@ -17,12 +21,33 @@
                    <view key="view" contentMode="scaleToFill" id="Ze5-6b-2t3">
                        <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                        <subviews>
+                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="  Copyright (c) 2018 Ramotion. All rights reserved." textAlignment="center" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="fcf-sN-ku0">
+                                <rect key="frame" x="16" y="630" width="343" height="17"/>
+                                <fontDescription key="fontDescription" type="system" pointSize="14"/>
+                                <nil key="textColor"/>
+                                <nil key="highlightedColor"/>
+                            </label>
+                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Folding Cell" textAlignment="center" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="bCd-3b-lHA">
+                                <rect key="frame" x="139.5" y="323" width="96" height="21"/>
+                                <fontDescription key="fontDescription" type="boldSystem" pointSize="17"/>
+                                <nil key="textColor"/>
+                                <nil key="highlightedColor"/>
+                            </label>
+                        </subviews>
                        <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+                        <constraints>
+                            <constraint firstItem="fcf-sN-ku0" firstAttribute="leading" secondItem="Ze5-6b-2t3" secondAttribute="leadingMargin" id="811-hI-Egq"/>
+                            <constraint firstItem="bCd-3b-lHA" firstAttribute="centerY" secondItem="Ze5-6b-2t3" secondAttribute="centerY" id="T4x-O3-JqD"/>
+                            <constraint firstItem="bCd-3b-lHA" firstAttribute="centerX" secondItem="Ze5-6b-2t3" secondAttribute="centerX" id="VFr-tp-sPw"/>
+                            <constraint firstItem="fcf-sN-ku0" firstAttribute="trailing" secondItem="Ze5-6b-2t3" secondAttribute="trailingMargin" id="dS9-pv-ebe"/>
+                            <constraint firstItem="xb3-aO-Qok" firstAttribute="top" secondItem="fcf-sN-ku0" secondAttribute="bottom" constant="20" id="kbD-dX-t3N"/>
+                        </constraints>
                    </view>
                </viewController>
                <placeholder placeholderIdentifier="IBFirstResponder" id="iYj-Kq-Ea1" userLabel="First Responder" sceneMemberID="firstResponder"/>
            </objects>
-            <point key="canvasLocation" x="53" y="375"/>
+            <point key="canvasLocation" x="52" y="374.66266866566718"/>
        </scene>
    </scenes>
 </document>
@@ -1,11 +1,11 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="12120" systemVersion="16F73" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" colorMatched="YES" initialViewController="0cn-rv-Emg">
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="13771" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" colorMatched="YES" initialViewController="0cn-rv-Emg">
    <device id="retina4_7" orientation="portrait">
        <adaptation id="fullscreen"/>
    </device>
    <dependencies>
        <deployment identifier="iOS"/>
-        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="12088"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="13772"/>
        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
    </dependencies>
    <customFonts key="customFonts">
@@ -25,7 +25,7 @@
            <objects>
                <tableViewController storyboardIdentifier="MainTableViewController" id="0cn-rv-Emg" customClass="MainTableViewController" customModule="FoldingCell_Demo" customModuleProvider="target" sceneMemberID="viewController">
                    <tableView key="view" clipsSubviews="YES" contentMode="scaleToFill" alwaysBounceVertical="YES" showsHorizontalScrollIndicator="NO" showsVerticalScrollIndicator="NO" dataMode="prototypes" style="plain" separatorStyle="none" rowHeight="667" sectionHeaderHeight="28" sectionFooterHeight="28" id="MwZ-K3-six">
-                        <rect key="frame" x="0.0" y="0.0" width="600" height="695"/>
+                        <rect key="frame" x="0.0" y="0.0" width="600" height="708"/>
                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
                        <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                        <color key="sectionIndexBackgroundColor" red="0.0" green="0.0" blue="0.0" alpha="0.0" colorSpace="custom" customColorSpace="sRGB"/>
@@ -66,11 +66,13 @@
                                                    <constraints>
                                                        <constraint firstAttribute="width" constant="88" id="79O-5u-rWy"/>
                                                        <constraint firstItem="uWG-zH-Vjo" firstAttribute="centerY" secondItem="UhV-pr-kw4" secondAttribute="centerY" constant="-35" id="BKr-4U-Xpn"/>
-                                                        <constraint firstItem="9ka-ho-kkM" firstAttribute="leading" secondItem="UhV-pr-kw4" secondAttribute="leading" constant="18" id="Cay-aa-P2d"/>
+                                                        <constraint firstItem="9ka-ho-kkM" firstAttribute="leading" relation="greaterThanOrEqual" secondItem="UhV-pr-kw4" secondAttribute="leading" id="Cay-aa-P2d"/>
                                                        <constraint firstItem="uWG-zH-Vjo" firstAttribute="centerX" secondItem="UhV-pr-kw4" secondAttribute="centerX" constant="-4" id="JBk-n5-unF"/>
+                                                        <constraint firstAttribute="trailing" relation="greaterThanOrEqual" secondItem="FQM-r1-a67" secondAttribute="trailing" constant="20" symbolic="YES" id="YfX-oc-QrI"/>
                                                        <constraint firstAttribute="bottom" secondItem="9ka-ho-kkM" secondAttribute="bottom" constant="28" id="bej-dB-MVA"/>
                                                        <constraint firstItem="FQM-r1-a67" firstAttribute="leading" secondItem="UhV-pr-kw4" secondAttribute="leading" constant="18" id="c48-WJ-cDt"/>
                                                        <constraint firstAttribute="bottom" secondItem="FQM-r1-a67" secondAttribute="bottom" constant="50" id="ccu-aB-Y5n"/>
+                                                        <constraint firstAttribute="trailing" secondItem="9ka-ho-kkM" secondAttribute="trailing" constant="14" id="yC5-K2-pLt"/>
                                                    </constraints>
                                                </view>
                                                <imageView userInteractionEnabled="NO" contentMode="scaleAspectFit" horizontalHuggingPriority="251" verticalHuggingPriority="251" image="dots" translatesAutoresizingMaskIntoConstraints="NO" id="lOX-iD-3OO">
@@ -88,13 +90,13 @@
                                                    </constraints>
                                                </view>
                                                <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="W 85th St, New York, 10024 " lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" minimumFontSize="7" translatesAutoresizingMaskIntoConstraints="NO" id="BUL-Of-nxF" userLabel="W 85th St, New York, 10024">
-                                                    <rect key="frame" x="124" y="28" width="426" height="16.5"/>
+                                                    <rect key="frame" x="370" y="28" width="180" height="16.5"/>
                                                    <fontDescription key="fontDescription" name="OpenSans" family="Open Sans" pointSize="14"/>
                                                    <color key="textColor" red="0.20000000000000001" green="0.23921568627450979" blue="0.2627450980392157" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                                                    <nil key="highlightedColor"/>
                                                </label>
                                                <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="E 30th St, New York, 10016" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" minimumFontSize="7" translatesAutoresizingMaskIntoConstraints="NO" id="mNy-cH-kEi" userLabel="W 85th St, New York, 10024">
-                                                    <rect key="frame" x="124" y="57" width="426" height="16.5"/>
+                                                    <rect key="frame" x="378" y="57" width="172" height="16.5"/>
                                                    <fontDescription key="fontDescription" name="OpenSans" family="Open Sans" pointSize="14"/>
                                                    <color key="textColor" red="0.20000000000000001" green="0.23921568630000001" blue="0.26274509800000001" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                                                    <nil key="highlightedColor"/>
@@ -119,7 +121,9 @@
                                                    <constraints>
                                                        <constraint firstItem="fZc-Gv-4xg" firstAttribute="leading" secondItem="LnD-j0-rqc" secondAttribute="leading" id="L6e-Uv-9vS"/>
                                                        <constraint firstAttribute="bottom" secondItem="fZc-Gv-4xg" secondAttribute="bottom" id="ZRs-x2-A0s"/>
+                                                        <constraint firstAttribute="trailing" relation="greaterThanOrEqual" secondItem="fZc-Gv-4xg" secondAttribute="trailing" constant="20" symbolic="YES" id="jo5-im-pgZ"/>
                                                        <constraint firstItem="dKi-6r-6NP" firstAttribute="leading" secondItem="LnD-j0-rqc" secondAttribute="leading" id="oWr-Zs-xYW"/>
+                                                        <constraint firstAttribute="trailing" relation="greaterThanOrEqual" secondItem="dKi-6r-6NP" secondAttribute="trailing" constant="20" symbolic="YES" id="rtR-Zg-NTk"/>
                                                        <constraint firstItem="dKi-6r-6NP" firstAttribute="top" secondItem="LnD-j0-rqc" secondAttribute="top" id="wF5-DY-L1I"/>
                                                    </constraints>
                                                </view>
@@ -143,8 +147,10 @@
                                                    <constraints>
                                                        <constraint firstItem="O5e-nR-iJW" firstAttribute="leading" secondItem="edX-4x-TiO" secondAttribute="leading" id="AYj-MP-1rV"/>
                                                        <constraint firstItem="O5e-nR-iJW" firstAttribute="top" secondItem="edX-4x-TiO" secondAttribute="top" id="cgQ-TI-IsS"/>
+                                                        <constraint firstAttribute="trailing" relation="greaterThanOrEqual" secondItem="a0P-Eh-vI9" secondAttribute="trailing" constant="20" symbolic="YES" id="ltE-8P-eIm"/>
                                                        <constraint firstItem="a0P-Eh-vI9" firstAttribute="leading" secondItem="edX-4x-TiO" secondAttribute="leading" id="oTf-nY-JXI"/>
                                                        <constraint firstAttribute="bottom" secondItem="a0P-Eh-vI9" secondAttribute="bottom" id="oeJ-q1-9t1"/>
+                                                        <constraint firstAttribute="trailing" relation="greaterThanOrEqual" secondItem="O5e-nR-iJW" secondAttribute="trailing" constant="20" symbolic="YES" id="uwS-Um-Dzp"/>
                                                    </constraints>
                                                </view>
                                                <view contentMode="scaleToFill" translatesAutoresizingMaskIntoConstraints="NO" id="XAj-wA-vfn" userLabel="LeftVoew">
@@ -169,6 +175,8 @@
                                                        <constraint firstAttribute="bottom" secondItem="sA6-bX-nDC" secondAttribute="bottom" id="FLY-M3-HBk"/>
                                                        <constraint firstAttribute="height" constant="40" id="JEm-kR-Yum"/>
                                                        <constraint firstItem="X8Y-jq-qbv" firstAttribute="leading" secondItem="XAj-wA-vfn" secondAttribute="leading" id="bpa-pP-9bM"/>
+                                                        <constraint firstAttribute="trailing" relation="greaterThanOrEqual" secondItem="X8Y-jq-qbv" secondAttribute="trailing" constant="20" symbolic="YES" id="gFa-fO-TAV"/>
+                                                        <constraint firstAttribute="trailing" relation="greaterThanOrEqual" secondItem="sA6-bX-nDC" secondAttribute="trailing" constant="20" symbolic="YES" id="pCm-UL-opC"/>
                                                        <constraint firstItem="X8Y-jq-qbv" firstAttribute="top" secondItem="XAj-wA-vfn" secondAttribute="top" id="qjl-VM-Pwi"/>
                                                    </constraints>
                                                </view>
@@ -177,7 +185,7 @@
                                            <constraints>
                                                <constraint firstItem="LnD-j0-rqc" firstAttribute="centerY" secondItem="XAj-wA-vfn" secondAttribute="centerY" id="1WA-KY-kPA"/>
                                                <constraint firstAttribute="trailing" secondItem="LnD-j0-rqc" secondAttribute="trailing" id="23p-a2-A6L"/>
-                                                <constraint firstItem="BUL-Of-nxF" firstAttribute="leading" secondItem="CQr-i9-7br" secondAttribute="leading" constant="124" id="4Aj-wM-xak"/>
+                                                <constraint firstItem="BUL-Of-nxF" firstAttribute="leading" relation="greaterThanOrEqual" secondItem="CQr-i9-7br" secondAttribute="leading" id="4Aj-wM-xak"/>
                                                <constraint firstItem="XAj-wA-vfn" firstAttribute="width" secondItem="edX-4x-TiO" secondAttribute="width" id="4SA-da-3ek"/>
                                                <constraint firstItem="lOX-iD-3OO" firstAttribute="top" secondItem="CQr-i9-7br" secondAttribute="top" constant="32" id="Dgd-LY-uFx"/>
                                                <constraint firstItem="UhV-pr-kw4" firstAttribute="leading" secondItem="CQr-i9-7br" secondAttribute="leading" id="HeC-4J-km5"/>
@@ -186,7 +194,7 @@
                                                <constraint firstAttribute="trailing" secondItem="mNy-cH-kEi" secondAttribute="trailing" constant="10" id="Rqh-At-NpG"/>
                                                <constraint firstItem="XAj-wA-vfn" firstAttribute="leading" secondItem="UhV-pr-kw4" secondAttribute="trailing" constant="20" id="TBj-Xh-aIR"/>
                                                <constraint firstItem="UhV-pr-kw4" firstAttribute="top" secondItem="CQr-i9-7br" secondAttribute="top" id="V89-lD-fHB"/>
-                                                <constraint firstItem="mNy-cH-kEi" firstAttribute="leading" secondItem="CQr-i9-7br" secondAttribute="leading" constant="124" id="XMf-Cs-Nu8"/>
+                                                <constraint firstItem="mNy-cH-kEi" firstAttribute="leading" relation="greaterThanOrEqual" secondItem="CQr-i9-7br" secondAttribute="leading" id="XMf-Cs-Nu8"/>
                                                <constraint firstItem="EVE-fe-u5I" firstAttribute="top" secondItem="CQr-i9-7br" secondAttribute="top" constant="52" id="Z3h-Dn-3CO"/>
                                                <constraint firstItem="LnD-j0-rqc" firstAttribute="height" secondItem="XAj-wA-vfn" secondAttribute="height" id="anH-lP-Xab"/>
                                                <constraint firstAttribute="height" constant="165" id="bfl-Uq-i0I"/>
@@ -237,6 +245,7 @@
                                                                <constraint firstAttribute="height" constant="49" id="AC3-t0-KIM"/>
                                                                <constraint firstAttribute="trailing" secondItem="4ve-4H-KPK" secondAttribute="trailing" constant="12" id="BgX-bA-WJy"/>
                                                                <constraint firstItem="4ve-4H-KPK" firstAttribute="top" secondItem="o36-zd-BZb" secondAttribute="top" id="RwT-Kf-gV5"/>
+                                                                <constraint firstItem="4ve-4H-KPK" firstAttribute="leading" relation="greaterThanOrEqual" secondItem="o36-zd-BZb" secondAttribute="leading" constant="20" symbolic="YES" id="bcC-Jw-xQO"/>
                                                                <constraint firstItem="vW5-Q1-KFs" firstAttribute="leading" secondItem="o36-zd-BZb" secondAttribute="leading" constant="14" id="eOn-QU-u2B"/>
                                                                <constraint firstAttribute="bottom" secondItem="4ve-4H-KPK" secondAttribute="bottom" id="n0y-uI-DZL"/>
                                                                <constraint firstAttribute="trailing" secondItem="7eb-NE-XLS" secondAttribute="trailing" id="ncs-Bz-WO7"/>
@@ -270,7 +279,9 @@
                                                            </subviews>
                                                            <color key="backgroundColor" red="0.0" green="0.0" blue="0.0" alpha="0.0" colorSpace="custom" customColorSpace="sRGB"/>
                                                            <constraints>
+                                                                <constraint firstAttribute="trailing" relation="greaterThanOrEqual" secondItem="qOA-jB-5OO" secondAttribute="trailing" constant="20" symbolic="YES" id="3fn-95-aAz"/>
                                                                <constraint firstItem="qOA-jB-5OO" firstAttribute="top" secondItem="sdL-VL-QmS" secondAttribute="top" id="cGd-ZP-J1s"/>
+                                                                <constraint firstAttribute="trailing" relation="greaterThanOrEqual" secondItem="S4b-sI-0J6" secondAttribute="trailing" constant="20" symbolic="YES" id="hFA-F9-nvT"/>
                                                                <constraint firstItem="S4b-sI-0J6" firstAttribute="leading" secondItem="sdL-VL-QmS" secondAttribute="leading" id="j7G-um-lhR"/>
                                                                <constraint firstItem="qOA-jB-5OO" firstAttribute="leading" secondItem="sdL-VL-QmS" secondAttribute="leading" id="kbc-V1-6VS"/>
                                                                <constraint firstAttribute="height" constant="40" id="nCu-JM-dqc"/>
@@ -320,8 +331,10 @@
                                                            <color key="backgroundColor" red="0.0" green="0.0" blue="0.0" alpha="0.0" colorSpace="custom" customColorSpace="sRGB"/>
                                                            <constraints>
                                                                <constraint firstAttribute="trailing" secondItem="R9w-bP-fWa" secondAttribute="trailing" id="03y-gy-i1D"/>
+                                                                <constraint firstItem="8pV-vb-qIN" firstAttribute="leading" relation="greaterThanOrEqual" secondItem="LnF-7u-0Wm" secondAttribute="leading" constant="20" symbolic="YES" id="5v9-wv-MiA"/>
                                                                <constraint firstAttribute="trailing" secondItem="8pV-vb-qIN" secondAttribute="trailing" id="C3p-9o-b86"/>
                                                                <constraint firstItem="8pV-vb-qIN" firstAttribute="top" secondItem="LnF-7u-0Wm" secondAttribute="top" id="P9u-kS-VVp"/>
+                                                                <constraint firstItem="R9w-bP-fWa" firstAttribute="leading" relation="greaterThanOrEqual" secondItem="LnF-7u-0Wm" secondAttribute="leading" constant="20" symbolic="YES" id="Y6C-17-VcW"/>
                                                                <constraint firstAttribute="bottom" secondItem="R9w-bP-fWa" secondAttribute="bottom" id="g99-zI-5d7"/>
                                                            </constraints>
                                                        </view>
@@ -489,6 +502,7 @@
                                                        <constraint firstItem="h39-gf-gsn" firstAttribute="leading" secondItem="lbp-KK-0lW" secondAttribute="trailing" constant="1" id="pXq-um-J27"/>
                                                        <constraint firstAttribute="trailing" secondItem="dff-zA-mGx" secondAttribute="trailing" id="rP4-SC-s3a"/>
                                                        <constraint firstAttribute="trailing" secondItem="fuy-ww-tkB" secondAttribute="trailing" constant="22" id="trm-Sb-BDX"/>
+                                                        <constraint firstAttribute="trailing" relation="greaterThanOrEqual" secondItem="W63-7b-X8w" secondAttribute="trailing" constant="20" symbolic="YES" id="u1C-hG-9rE"/>
                                                        <constraint firstAttribute="height" constant="165" id="zna-xw-SZ3"/>
                                                    </constraints>
                                                </view>
@@ -680,7 +694,7 @@
                        </connections>
                    </tableView>
                    <freeformSimulatedSizeMetrics key="simulatedDestinationMetrics"/>
-                    <size key="freeformSize" width="600" height="695"/>
+                    <size key="freeformSize" width="600" height="708"/>
                </tableViewController>
                <placeholder placeholderIdentifier="IBFirstResponder" id="WxO-6i-Q9B" userLabel="First Responder" sceneMemberID="firstResponder"/>
            </objects>
@@ -6,34 +6,38 @@
 //  Copyright © 2015 Alex K. All rights reserved.
 //

-import UIKit
 import FoldingCell
+import UIKit

 class DemoCell: FoldingCell {
-  
-  @IBOutlet weak var closeNumberLabel: UILabel!
-  @IBOutlet weak var openNumberLabel: UILabel!
-  
-  var number: Int = 0 {
-    didSet {
-      closeNumberLabel.text = String(number)
-      openNumberLabel.text = String(number)
+
+    @IBOutlet var closeNumberLabel: UILabel!
+    @IBOutlet var openNumberLabel: UILabel!
+
+    var number: Int = 0 {
+        didSet {
+            closeNumberLabel.text = String(number)
+            openNumberLabel.text = String(number)
+        }
+    }
+
+    override func awakeFromNib() {
+        foregroundView.layer.cornerRadius = 10
+        foregroundView.layer.masksToBounds = true
+        super.awakeFromNib()
+    }
+
+    override func animationDuration(_ itemIndex: NSInteger, type _: FoldingCell.AnimationType) -> TimeInterval {
+        let durations = [0.26, 0.2, 0.2]
+        return durations[itemIndex]
    }
-  }
-  
-  override func awakeFromNib() {
-    foregroundView.layer.cornerRadius = 10
-    foregroundView.layer.masksToBounds = true
-    super.awakeFromNib()
-  }
-  
 }

 // MARK: - Actions ⚡️
+
 extension DemoCell {
-  
-  @IBAction func buttonHandler(_ sender: AnyObject) {
-    print("tap")
-  }
-  
+
+    @IBAction func buttonHandler(_: AnyObject) {
+        print("tap")
+    }
 }
@@ -21,90 +21,88 @@
 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 // THE SOFTWARE.

-import UIKit
 import FoldingCell
+import UIKit

 class MainTableViewController: UITableViewController {
-  
-  let kCloseCellHeight: CGFloat = 179
-  let kOpenCellHeight: CGFloat = 488
-  let kRowsCount = 10
-  var cellHeights: [CGFloat] = []
-  
-  override func viewDidLoad() {
-    super.viewDidLoad()
-    setup()
-  }
-  
-  private func setup() {
-    cellHeights = Array(repeating: kCloseCellHeight, count: kRowsCount)
-    tableView.estimatedRowHeight = kCloseCellHeight
-    tableView.rowHeight = UITableViewAutomaticDimension
-    tableView.backgroundColor = UIColor(patternImage: #imageLiteral(resourceName: "background"))
-  }
-  
+
+    let kCloseCellHeight: CGFloat = 179
+    let kOpenCellHeight: CGFloat = 488
+    let kRowsCount = 10
+    var cellHeights: [CGFloat] = []
+
+    override func viewDidLoad() {
+        super.viewDidLoad()
+        setup()
+    }
+
+    private func setup() {
+        cellHeights = Array(repeating: kCloseCellHeight, count: kRowsCount)
+        tableView.estimatedRowHeight = kCloseCellHeight
+        tableView.rowHeight = UITableViewAutomaticDimension
+        tableView.backgroundColor = UIColor(patternImage: #imageLiteral(resourceName: "background"))
+    }
 }

 // MARK: - TableView
+
 extension MainTableViewController {
-  
-  override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
-    return 10
-  }
-  
-  override func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {
-    guard case let cell as DemoCell = cell else {
-      return
+
+    override func tableView(_: UITableView, numberOfRowsInSection _: Int) -> Int {
+        return 10
    }
-    
-    cell.backgroundColor = .clear
-    
-    if cellHeights[indexPath.row] == kCloseCellHeight {
-      cell.selectedAnimation(false, animated: false, completion:nil)
-    } else {
-      cell.selectedAnimation(true, animated: false, completion: nil)
+
+    override func tableView(_: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {
+        guard case let cell as DemoCell = cell else {
+            return
+        }
+
+        cell.backgroundColor = .clear
+
+        if cellHeights[indexPath.row] == kCloseCellHeight {
+            cell.unfold(false, animated: false, completion: nil)
+        } else {
+            cell.unfold(true, animated: false, completion: nil)
+        }
+
+        cell.number = indexPath.row
    }
-    
-    cell.number = indexPath.row
-  }
-  
-  override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
-    let cell = tableView.dequeueReusableCell(withIdentifier: "FoldingCell", for: indexPath) as! FoldingCell
-    let durations: [TimeInterval] = [0.26, 0.2, 0.2]
-    cell.durationsForExpandedState = durations
-    cell.durationsForCollapsedState = durations
-    return cell
-  }
-  
-  override func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
-    return cellHeights[indexPath.row]
-  }
-  
-  override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
-    
-    let cell = tableView.cellForRow(at: indexPath) as! FoldingCell
-    
-    if cell.isAnimating() {
-      return
+
+    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
+        let cell = tableView.dequeueReusableCell(withIdentifier: "FoldingCell", for: indexPath) as! FoldingCell
+        let durations: [TimeInterval] = [0.26, 0.2, 0.2]
+        cell.durationsForExpandedState = durations
+        cell.durationsForCollapsedState = durations
+        return cell
    }
-    
-    var duration = 0.0
-    let cellIsCollapsed = cellHeights[indexPath.row] == kCloseCellHeight
-    if cellIsCollapsed {
-      cellHeights[indexPath.row] = kOpenCellHeight
-      cell.selectedAnimation(true, animated: true, completion: nil)
-      duration = 0.5
-    } else {
-      cellHeights[indexPath.row] = kCloseCellHeight
-      cell.selectedAnimation(false, animated: true, completion: nil)
-      duration = 0.8
+
+    override func tableView(_: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
+        return cellHeights[indexPath.row]
+    }
+
+    override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
+
+        let cell = tableView.cellForRow(at: indexPath) as! FoldingCell
+
+        if cell.isAnimating() {
+            return
+        }
+
+        var duration = 0.0
+        let cellIsCollapsed = cellHeights[indexPath.row] == kCloseCellHeight
+        if cellIsCollapsed {
+            cellHeights[indexPath.row] = kOpenCellHeight
+            cell.unfold(true, animated: true, completion: nil)
+            duration = 0.5
+        } else {
+            cellHeights[indexPath.row] = kCloseCellHeight
+            cell.unfold(false, animated: true, completion: nil)
+            duration = 0.8
+        }
+
+        UIView.animate(withDuration: duration, delay: 0, options: .curveEaseOut, animations: { () -> Void in
+            tableView.beginUpdates()
+            tableView.endUpdates()
+        }, completion: nil)
    }
-    
-    UIView.animate(withDuration: duration, delay: 0, options: .curveEaseOut, animations: { () -> Void in
-      tableView.beginUpdates()
-      tableView.endUpdates()
-    }, completion: nil)
-    
-  }
-  
 }
@@ -16,36 +16,7 @@


 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
-  // Override point for customization after application launch.
  return YES;
 }
-
-
- (void)applicationWillResignActive:(UIApplication *)application {
-  // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
-  // Use this method to pause ongoing tasks, disable timers, and invalidate graphics rendering callbacks. Games should use this method to pause the game.
-}
-
-
- (void)applicationDidEnterBackground:(UIApplication *)application {
-  // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
-  // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
-}
-
-
- (void)applicationWillEnterForeground:(UIApplication *)application {
-  // Called as part of the transition from the background to the active state; here you can undo many of the changes made on entering the background.
-}
-
-
- (void)applicationDidBecomeActive:(UIApplication *)application {
-  // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
-}
-
-
- (void)applicationWillTerminate:(UIApplication *)application {
-  // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
-}
-
-
+    
@end
@@ -1,7 +1,12 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="11134" systemVersion="15F34" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" launchScreen="YES" useTraitCollections="YES" colorMatched="YES" initialViewController="01J-lp-oVM">
+<?xml version="1.0" encoding="UTF-8"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="13771" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" launchScreen="YES" useTraitCollections="YES" colorMatched="YES" initialViewController="01J-lp-oVM">
+    <device id="retina4_7" orientation="portrait">
+        <adaptation id="fullscreen"/>
+    </device>
    <dependencies>
-        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="11106"/>
+        <deployment identifier="iOS"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="13772"/>
+        <capability name="Constraints to layout margins" minToolsVersion="6.0"/>
        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
    </dependencies>
    <scenes>
@@ -16,12 +21,33 @@
                    <view key="view" contentMode="scaleToFill" id="Ze5-6b-2t3">
                        <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                        <subviews>
+                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="  Copyright (c) 2018 Ramotion. All rights reserved." textAlignment="center" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="fcf-sN-ku0">
+                                <rect key="frame" x="16" y="630" width="343" height="17"/>
+                                <fontDescription key="fontDescription" type="system" pointSize="14"/>
+                                <nil key="textColor"/>
+                                <nil key="highlightedColor"/>
+                            </label>
+                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Folding Cell" textAlignment="center" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="bCd-3b-lHA">
+                                <rect key="frame" x="139.5" y="323" width="96" height="21"/>
+                                <fontDescription key="fontDescription" type="boldSystem" pointSize="17"/>
+                                <nil key="textColor"/>
+                                <nil key="highlightedColor"/>
+                            </label>
+                        </subviews>
                        <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+                        <constraints>
+                            <constraint firstItem="fcf-sN-ku0" firstAttribute="leading" secondItem="Ze5-6b-2t3" secondAttribute="leadingMargin" id="811-hI-Egq"/>
+                            <constraint firstItem="bCd-3b-lHA" firstAttribute="centerY" secondItem="Ze5-6b-2t3" secondAttribute="centerY" id="T4x-O3-JqD"/>
+                            <constraint firstItem="bCd-3b-lHA" firstAttribute="centerX" secondItem="Ze5-6b-2t3" secondAttribute="centerX" id="VFr-tp-sPw"/>
+                            <constraint firstItem="fcf-sN-ku0" firstAttribute="trailing" secondItem="Ze5-6b-2t3" secondAttribute="trailingMargin" id="dS9-pv-ebe"/>
+                            <constraint firstItem="xb3-aO-Qok" firstAttribute="top" secondItem="fcf-sN-ku0" secondAttribute="bottom" constant="20" id="kbD-dX-t3N"/>
+                        </constraints>
                    </view>
                </viewController>
                <placeholder placeholderIdentifier="IBFirstResponder" id="iYj-Kq-Ea1" userLabel="First Responder" sceneMemberID="firstResponder"/>
            </objects>
-            <point key="canvasLocation" x="53" y="375"/>
+            <point key="canvasLocation" x="52" y="374.66266866566718"/>
        </scene>
    </scenes>
 </document>
@@ -305,7 +305,7 @@
 			isa = PBXProject;
 			attributes = {
 				LastSwiftUpdateCheck = 0830;
-				LastUpgradeCheck = 0800;
+				LastUpgradeCheck = 0920;
 				ORGANIZATIONNAME = "Alex K.";
 				TargetAttributes = {
 					8498513B1C5639F9006FA400 = {
@@ -316,12 +316,13 @@
 					};
 					8499D8841D0054A8004B5B37 = {
 						CreatedOnToolsVersion = 7.3.1;
-						DevelopmentTeam = 2VFCBFYPFW;
+						DevelopmentTeam = LEAZS7L33U;
 						LastSwiftMigration = 0830;
 					};
 					9D57F31B1EDC7A6F0004599F = {
 						CreatedOnToolsVersion = 8.3.2;
-						DevelopmentTeam = 2VFCBFYPFW;
+						DevelopmentTeam = 34MUF9YXTA;
+						LastSwiftMigration = 0920;
 						ProvisioningStyle = Automatic;
 					};
 					9DAA51531EDDBAD700DFC539 = {
@@ -485,14 +486,20 @@
 				CLANG_CXX_LIBRARY = "libc++";
 				CLANG_ENABLE_MODULES = YES;
 				CLANG_ENABLE_OBJC_ARC = YES;
+				CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
 				CLANG_WARN_BOOL_CONVERSION = YES;
+				CLANG_WARN_COMMA = YES;
 				CLANG_WARN_CONSTANT_CONVERSION = YES;
 				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
 				CLANG_WARN_EMPTY_BODY = YES;
 				CLANG_WARN_ENUM_CONVERSION = YES;
 				CLANG_WARN_INFINITE_RECURSION = YES;
 				CLANG_WARN_INT_CONVERSION = YES;
+				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
+				CLANG_WARN_STRICT_PROTOTYPES = YES;
 				CLANG_WARN_SUSPICIOUS_MOVE = YES;
 				CLANG_WARN_UNREACHABLE_CODE = YES;
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
@@ -531,14 +538,20 @@
 				CLANG_CXX_LIBRARY = "libc++";
 				CLANG_ENABLE_MODULES = YES;
 				CLANG_ENABLE_OBJC_ARC = YES;
+				CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
 				CLANG_WARN_BOOL_CONVERSION = YES;
+				CLANG_WARN_COMMA = YES;
 				CLANG_WARN_CONSTANT_CONVERSION = YES;
 				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
 				CLANG_WARN_EMPTY_BODY = YES;
 				CLANG_WARN_ENUM_CONVERSION = YES;
 				CLANG_WARN_INFINITE_RECURSION = YES;
 				CLANG_WARN_INT_CONVERSION = YES;
+				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
+				CLANG_WARN_STRICT_PROTOTYPES = YES;
 				CLANG_WARN_SUSPICIOUS_MOVE = YES;
 				CLANG_WARN_UNREACHABLE_CODE = YES;
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
@@ -602,7 +615,7 @@
 				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "";
 				CURRENT_PROJECT_VERSION = 1;
 				DEFINES_MODULE = YES;
-				DEVELOPMENT_TEAM = 2VFCBFYPFW;
+				DEVELOPMENT_TEAM = LEAZS7L33U;
 				DYLIB_COMPATIBILITY_VERSION = 1;
 				DYLIB_CURRENT_VERSION = 1;
 				DYLIB_INSTALL_NAME_BASE = "@rpath";
@@ -614,7 +627,7 @@
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
-				SWIFT_VERSION = 3.0;
+				SWIFT_VERSION = 4.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 				VERSIONING_SYSTEM = "apple-generic";
 				VERSION_INFO_PREFIX = "";
@@ -630,7 +643,7 @@
 				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "";
 				CURRENT_PROJECT_VERSION = 1;
 				DEFINES_MODULE = YES;
-				DEVELOPMENT_TEAM = 2VFCBFYPFW;
+				DEVELOPMENT_TEAM = LEAZS7L33U;
 				DYLIB_COMPATIBILITY_VERSION = 1;
 				DYLIB_CURRENT_VERSION = 1;
 				DYLIB_INSTALL_NAME_BASE = "@rpath";
@@ -641,7 +654,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = com.ramotion.FoldingCell;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;
-				SWIFT_VERSION = 3.0;
+				SWIFT_VERSION = 4.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 				VERSIONING_SYSTEM = "apple-generic";
 				VERSION_INFO_PREFIX = "";
@@ -658,7 +671,7 @@
 				CLANG_WARN_DOCUMENTATION_COMMENTS = YES;
 				CODE_SIGN_IDENTITY = "iPhone Developer";
 				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
-				DEVELOPMENT_TEAM = 2VFCBFYPFW;
+				DEVELOPMENT_TEAM = 34MUF9YXTA;
 				INFOPLIST_FILE = "FoldingCell-Demo/Info.plist";
 				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
@@ -666,7 +679,8 @@
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				PROVISIONING_PROFILE_SPECIFIER = "";
 				SWIFT_ACTIVE_COMPILATION_CONDITIONS = DEBUG;
-				SWIFT_VERSION = 3.0;
+				SWIFT_SWIFT3_OBJC_INFERENCE = Default;
+				SWIFT_VERSION = 4.0;
 			};
 			name = Debug;
 		};
@@ -680,14 +694,15 @@
 				CLANG_WARN_DOCUMENTATION_COMMENTS = YES;
 				CODE_SIGN_IDENTITY = "iPhone Developer";
 				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
-				DEVELOPMENT_TEAM = 2VFCBFYPFW;
+				DEVELOPMENT_TEAM = 34MUF9YXTA;
 				INFOPLIST_FILE = "FoldingCell-Demo/Info.plist";
 				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = "ramotion.com.FoldingCell-Demo";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				PROVISIONING_PROFILE_SPECIFIER = "";
-				SWIFT_VERSION = 3.0;
+				SWIFT_SWIFT3_OBJC_INFERENCE = Default;
+				SWIFT_VERSION = 4.0;
 			};
 			name = Release;
 		};
@@ -777,6 +792,7 @@
 				9DAA51691EDDBAD700DFC539 /* Release */,
 			);
 			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
 		};
 /* End XCConfigurationList section */
 	};
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0800"
+   LastUpgradeVersion = "0920"
   version = "1.3">
   <BuildAction
      parallelizeBuildables = "YES"
@@ -26,6 +26,7 @@
      buildConfiguration = "Debug"
      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      language = ""
      shouldUseLaunchSchemeArgsEnv = "YES">
      <Testables>
      </Testables>
@@ -36,6 +37,7 @@
      buildConfiguration = "Debug"
      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      language = ""
      launchStyle = "0"
      useCustomWorkingDirectory = "NO"
      ignoresPersistentStateOnLaunch = "NO"
@@ -25,496 +25,469 @@ import UIKit

 /// UITableViewCell with folding animation
 open class FoldingCell: UITableViewCell {
-  
-  /// UIView whitch display when cell open
-  @IBOutlet weak open var containerView: UIView!
-  @IBOutlet weak open var containerViewTop: NSLayoutConstraint!
-  
-  /// UIView whitch display when cell close
-  @IBOutlet weak open var foregroundView: RotatedView!
-  @IBOutlet weak open var foregroundViewTop: NSLayoutConstraint!
-  var animationView: UIView?
-  
-  ///  the number of folding elements. Default 2
-  @IBInspectable open var itemCount: NSInteger = 2
-  
-  /// The color of the back cell
-  @IBInspectable open var backViewColor: UIColor = UIColor.brown
-  
-  var animationItemViews: [RotatedView]?
-  
-  /**
-   Folding animation types
-   
-   - Open:  Open direction
-   - Close: Close direction
-   */
-  public enum AnimationType {
-    case open
-    case close
-  }
-  
-  // MARK:  life cicle
-  
-  override public init(style: UITableViewCellStyle, reuseIdentifier: String?) {
-    super.init(style: style, reuseIdentifier: reuseIdentifier)
-  }
-  
-  required public init?(coder aDecoder: NSCoder) {
-    super.init(coder: aDecoder)
-  }
-  
-  override open func awakeFromNib() {
-    super.awakeFromNib()
    
-    commonInit()
-  }
-  
-  /**
-   Call this method in methods init(style: UITableViewCellStyle, reuseIdentifier: String?) after creating Views
-   */
-  open func commonInit() {
-    configureDefaultState()
+    /// UIView whitch display when cell open
+    @IBOutlet open var containerView: UIView!
+    @IBOutlet open var containerViewTop: NSLayoutConstraint!
    
-    self.selectionStyle = .none
+    /// UIView whitch display when cell close
+    @IBOutlet open var foregroundView: RotatedView!
+    @IBOutlet open var foregroundViewTop: NSLayoutConstraint!
+    var animationView: UIView?
    
-    containerView.layer.cornerRadius = foregroundView.layer.cornerRadius
-    containerView.layer.masksToBounds = true
-  }
-
-  
-  // MARK: configure
-  
-  func configureDefaultState() {
+    ///  the number of folding elements. Default 2
+    @IBInspectable open var itemCount: NSInteger = 2
    
-    guard let foregroundViewTop = self.foregroundViewTop,
-      let containerViewTop = self.containerViewTop else {
-        fatalError("set constratins outlets")
+    /// The color of the back cell
+    @IBInspectable open var backViewColor: UIColor = UIColor.brown
+    
+    var animationItemViews: [RotatedView]?
+    
+    /**
+     Folding animation types
+     
+     - Open:  Open direction
+     - Close: Close direction
+     */
+    public enum AnimationType {
+        case open
+        case close
    }
    
-    containerViewTop.constant = foregroundViewTop.constant
-    containerView.alpha = 0;
+    // MARK: Life Cycle
    
-    if let height = (foregroundView.constraints.filter { $0.firstAttribute == .height && $0.secondItem == nil}).first?.constant {
-      foregroundView.layer.anchorPoint = CGPoint(x: 0.5, y: 1)
-      foregroundViewTop.constant += height / 2
-    }
-    foregroundView.layer.transform = foregroundView.transform3d()
-    
-    createAnimationView();
-    self.contentView.bringSubview(toFront: foregroundView)
-  }
-  
-  func createAnimationItemView()->[RotatedView] {
-    guard let animationView = self.animationView else {
-      fatalError()
+    open override func awakeFromNib() {
+        super.awakeFromNib()
+        
+        commonInit()
    }
    
-    var items = [RotatedView]()
-    items.append(foregroundView)
-    var rotatedViews = [RotatedView]()
-    for case let itemView as RotatedView in animationView.subviews.filter({$0 is RotatedView}).sorted(by: {$0.tag < $1.tag}) {
-      rotatedViews.append(itemView)
-      if let backView = itemView.backView {
-        rotatedViews.append(backView)
-      }
-    }
-    items.append(contentsOf: rotatedViews)
-    return items
-  }
-  
-  func configureAnimationItems(_ animationType: AnimationType) {
-    
-    guard let animationViewSuperView = animationView?.subviews else {
-      fatalError()
+    /**
+     Call this method in methods init(style: UITableViewCellStyle, reuseIdentifier: String?) after creating Views
+     */
+    open func commonInit() {
+        configureDefaultState()
+        
+        selectionStyle = .none
+        
+        containerView.layer.cornerRadius = foregroundView.layer.cornerRadius
+        containerView.layer.masksToBounds = true
    }
    
-    if animationType == .open {
-      for view in animationViewSuperView.filter({$0 is RotatedView}) {
-        view.alpha = 0;
-      }
-    } else { // close
-      for case let view as RotatedView in animationViewSuperView.filter({$0 is RotatedView}) {
-        if animationType == .open {
-          view.alpha = 0
-        } else {
-          view.alpha = 1
-          view.backView?.alpha = 0
+    // MARK: configure
+    
+    func configureDefaultState() {
+        
+        guard let foregroundViewTop = self.foregroundViewTop,
+            let containerViewTop = self.containerViewTop else {
+                fatalError("set foregroundViewTop or containerViewTop outlets in storyboard")
        }
-      }
-    }
-  }
-  
-  func createAnimationView() {
-    
-    animationView = UIView(frame: containerView.frame)
-    animationView?.layer.cornerRadius = foregroundView.layer.cornerRadius
-    animationView?.backgroundColor = .clear
-    animationView?.translatesAutoresizingMaskIntoConstraints = false
-    animationView?.alpha = 0
-    
-    guard let animationView = self.animationView else { return }
-
-    self.contentView.addSubview(animationView)
-    
-    // copy constraints from containerView
-    var newConstraints = [NSLayoutConstraint]()
-    for constraint in self.contentView.constraints {
-      if let item = constraint.firstItem as? UIView , item == containerView {
-        let newConstraint = NSLayoutConstraint( item: animationView, attribute: constraint.firstAttribute,
-          relatedBy: constraint.relation, toItem: constraint.secondItem, attribute: constraint.secondAttribute,
-          multiplier: constraint.multiplier, constant: constraint.constant)
        
-        newConstraints.append(newConstraint)
-      } else if let item: UIView = constraint.secondItem as? UIView , item == containerView {
-        let newConstraint = NSLayoutConstraint(item: constraint.firstItem, attribute: constraint.firstAttribute,
-          relatedBy: constraint.relation, toItem: animationView, attribute: constraint.secondAttribute,
-          multiplier: constraint.multiplier, constant: constraint.constant)
+        containerViewTop.constant = foregroundViewTop.constant
+        containerView.alpha = 0
        
-        newConstraints.append(newConstraint)
-      }
-    }
-    self.contentView.addConstraints(newConstraints)
-    
-    for constraint in containerView.constraints { // added height constraint
-      if constraint.firstAttribute == .height, let item: UIView = constraint.firstItem as? UIView, item == containerView {
-        let newConstraint = NSLayoutConstraint(item: animationView, attribute: constraint.firstAttribute,
-          relatedBy: constraint.relation, toItem: nil, attribute: constraint.secondAttribute,
-          multiplier: constraint.multiplier, constant: constraint.constant)
+        if let height = (foregroundView.constraints.filter { $0.firstAttribute == .height && $0.secondItem == nil }).first?.constant {
+            foregroundView.layer.anchorPoint = CGPoint(x: 0.5, y: 1)
+            foregroundViewTop.constant += height / 2
+        }
+        foregroundView.layer.transform = foregroundView.transform3d()
        
-        animationView.addConstraint(newConstraint)
-      }
-    }
-  }
-
-  
-  func addImageItemsToAnimationView() {
-    containerView.alpha = 1;
-    let contSize        = containerView.bounds.size
-    let forgSize        = foregroundView.bounds.size
-    
-    // added first item
-    var image = containerView.pb_takeSnapshot(CGRect(x: 0, y: 0, width: contSize.width, height: forgSize.height))
-    var imageView = UIImageView(image: image)
-    imageView.tag = 0
-    imageView.layer.cornerRadius = foregroundView.layer.cornerRadius
-    animationView?.addSubview(imageView)
-    
-    // added secod item
-    image = containerView.pb_takeSnapshot(CGRect(x: 0, y: forgSize.height, width: contSize.width, height: forgSize.height))
-    
-    imageView                     = UIImageView(image: image)
-    let rotatedView               = RotatedView(frame: imageView.frame)
-    rotatedView.tag               = 1
-    rotatedView.layer.anchorPoint = CGPoint.init(x: 0.5, y: 0)
-    rotatedView.layer.transform   = rotatedView.transform3d()
-    
-    rotatedView.addSubview(imageView)
-    animationView?.addSubview(rotatedView)
-    rotatedView.frame = CGRect(x: imageView.frame.origin.x, y: forgSize.height, width: contSize.width, height: forgSize.height)
-    
-    // added other views
-    let itemHeight = (contSize.height - 2 * forgSize.height) / CGFloat(itemCount - 2)
-    
-    if itemCount == 2 {
-        // decrease containerView height or increase itemCount
-        assert(contSize.height - 2 * forgSize.height == 0, "contanerView.height too high")
-    }
-    else{
-        // decrease containerView height or increase itemCount
-        assert(contSize.height - 2 * forgSize.height >= itemHeight, "contanerView.height too high")
+        createAnimationView()
+        contentView.bringSubview(toFront: foregroundView)
    }
    
-    var yPosition = 2 * forgSize.height
-    var tag = 2
-    for _ in 2..<itemCount {
-      image = containerView.pb_takeSnapshot(CGRect(x: 0, y: yPosition, width: contSize.width, height: itemHeight))
-      
-      imageView = UIImageView(image: image)
-      let rotatedView = RotatedView(frame: imageView.frame)
-      
-      rotatedView.addSubview(imageView)
-      rotatedView.layer.anchorPoint = CGPoint.init(x: 0.5, y: 0)
-      rotatedView.layer.transform = rotatedView.transform3d()
-      animationView?.addSubview(rotatedView)
-      rotatedView.frame = CGRect(x: 0, y: yPosition, width: rotatedView.bounds.size.width, height: itemHeight)
-      rotatedView.tag = tag
-      
-      yPosition += itemHeight
-      tag += 1;
+    func createAnimationItemView() -> [RotatedView] {
+        
+        var items = [RotatedView]()
+        items.append(foregroundView)
+        var rotatedViews = [RotatedView]()
+        
+        animationView?.subviews
+            .flatMap({ $0 as? RotatedView })
+            .sorted(by: { $0.tag < $1.tag })
+            .forEach { itemView in
+                rotatedViews.append(itemView)
+                if let backView = itemView.backView {
+                    rotatedViews.append(backView)
+                }
+        }
+        
+        items.append(contentsOf: rotatedViews)
+        return items
    }
    
-    containerView.alpha = 0;
-    
-    if let animationView = self.animationView {
-      // added back view
-      var previusView: RotatedView?
-      for case let contener as RotatedView in animationView.subviews.sorted(by: { $0.tag < $1.tag })
-        where contener.tag > 0 && contener.tag < animationView.subviews.count {
-          previusView?.addBackView(contener.bounds.size.height, color: backViewColor)
-          previusView = contener
-      }
-    }
-    animationItemViews = createAnimationItemView()
-  }
-  
-  fileprivate func removeImageItemsFromAnimationView() {
-    
-    guard let animationView = self.animationView else {
-      return
-    }
-
-    animationView.subviews.forEach({ $0.removeFromSuperview() })
-  }
-
-  
-  // MARK: public
-  
-  /**
-   Open or close cell
-   
-   - parameter isSelected: Specify true if you want to open cell or false if you close cell.
-   - parameter animated:   Specify true if you want to animate the change in visibility or false if you want immediately.
-   - parameter completion: A block object to be executed when the animation sequence ends.
-   */
-  open func selectedAnimation(_ isSelected: Bool, animated: Bool, completion: ((Void) -> Void)?) {
-    
-    if isSelected {
-      
-      if animated {
-        containerView.alpha = 0;
-        openAnimation(completion)
-      } else  {
-        foregroundView.alpha = 0
-        containerView.alpha = 1;
-      }
-      
-    } else {
-      if animated {
-        closeAnimation(completion)
-      } else {
-        foregroundView.alpha = 1;
-        containerView.alpha = 0;
-      }
-    }
-  }
-  
-  open func isAnimating()->Bool {
-    return animationView?.alpha == 1 ? true : false
-  }
-  
-  // MARK: animations  
-  open var durationsForExpandedState: [TimeInterval] = []
-  open var durationsForCollapsedState: [TimeInterval] = []
-  
-  func durationSequence(_ type: AnimationType)-> [TimeInterval] {
-    var durations  = [TimeInterval]()
-    for i in 0..<itemCount-1 {
-      let duration = type == .close ? durationsForCollapsedState[i] : durationsForExpandedState[i]
-      durations.append(TimeInterval(duration / 2.0))
-      durations.append(TimeInterval(duration / 2.0))
-    }
-    return durations
-  }
-  
-  func openAnimation(_ completion: ((Void) -> Void)?) {
-    
-    removeImageItemsFromAnimationView()
-    addImageItemsToAnimationView()
-    
-    guard let animationView = self.animationView else {
-      return
+    func configureAnimationItems(_ animationType: AnimationType) {
+        
+        if animationType == .open {
+            animationView?.subviews
+                .flatMap { $0 as? RotatedView }
+                .forEach { $0.alpha = 0 }
+        } else {
+            animationView?.subviews
+                .flatMap { $0 as? RotatedView }
+                .forEach {
+                    if animationType == .open {
+                        $0.alpha = 0
+                    } else {
+                        $0.alpha = 1
+                        $0.backView?.alpha = 0
+                    }
+            }
+        }
    }
    
-    animationView.alpha = 1;
-    containerView.alpha = 0;
-    
-    let durations = durationSequence(.open)
-    
-    var delay: TimeInterval = 0
-    var timing                = kCAMediaTimingFunctionEaseIn
-    var from: CGFloat         = 0.0;
-    var to: CGFloat           = -CGFloat.pi / 2
-    var hidden                = true
-    configureAnimationItems(.open)
-    
-    guard let animationItemViews = self.animationItemViews else {
-      return
+    func createAnimationView() {
+        animationView = UIView(frame: containerView.frame)
+        animationView?.layer.cornerRadius = foregroundView.layer.cornerRadius
+        animationView?.backgroundColor = .clear
+        animationView?.translatesAutoresizingMaskIntoConstraints = false
+        animationView?.alpha = 0
+        
+        guard let animationView = self.animationView else { return }
+        
+        self.contentView.addSubview(animationView)
+        
+        // copy constraints from containerView
+        var newConstraints = [NSLayoutConstraint]()
+        for constraint in self.contentView.constraints {
+            if let item = constraint.firstItem as? UIView, item == containerView {
+                let newConstraint = NSLayoutConstraint(item: animationView, attribute: constraint.firstAttribute,
+                                                       relatedBy: constraint.relation, toItem: constraint.secondItem, attribute: constraint.secondAttribute,
+                                                       multiplier: constraint.multiplier, constant: constraint.constant)
+                
+                newConstraints.append(newConstraint)
+            } else if let firstItem = constraint.firstItem as? UIView, let secondItem: UIView = constraint.secondItem as? UIView, secondItem == containerView {
+                let newConstraint = NSLayoutConstraint(item: firstItem, attribute: constraint.firstAttribute,
+                                                       relatedBy: constraint.relation, toItem: animationView, attribute: constraint.secondAttribute,
+                                                       multiplier: constraint.multiplier, constant: constraint.constant)
+                
+                newConstraints.append(newConstraint)
+            }
+        }
+        self.contentView.addConstraints(newConstraints)
+        
+        for constraint in containerView.constraints { // added height constraint
+            if constraint.firstAttribute == .height, let item: UIView = constraint.firstItem as? UIView, item == containerView {
+                let newConstraint = NSLayoutConstraint(item: animationView, attribute: constraint.firstAttribute,
+                                                       relatedBy: constraint.relation, toItem: nil, attribute: constraint.secondAttribute,
+                                                       multiplier: constraint.multiplier, constant: constraint.constant)
+                
+                animationView.addConstraint(newConstraint)
+            }
+        }
    }
    
-    for index in 0..<animationItemViews.count {
-      let animatedView = animationItemViews[index]
-      
-      animatedView.foldingAnimation(timing, from: from, to: to, duration: durations[index], delay: delay, hidden: hidden)
-      
-      from   = from == 0.0 ? CGFloat.pi / 2 : 0.0
-      to     = to == 0.0 ? -CGFloat.pi / 2 : 0.0
-      timing = timing == kCAMediaTimingFunctionEaseIn ? kCAMediaTimingFunctionEaseOut : kCAMediaTimingFunctionEaseIn
-      hidden = !hidden
-      delay += durations[index]
+    func addImageItemsToAnimationView() {
+        containerView.alpha = 1
+        let containerViewSize = containerView.bounds.size
+        let foregroundViewSize = foregroundView.bounds.size
+        
+        // added first item
+        var image = containerView.pb_takeSnapshot(CGRect(x: 0, y: 0, width: containerViewSize.width, height: foregroundViewSize.height))
+        var imageView = UIImageView(image: image)
+        imageView.tag = 0
+        imageView.layer.cornerRadius = foregroundView.layer.cornerRadius
+        animationView?.addSubview(imageView)
+        
+        // added secod item
+        image = containerView.pb_takeSnapshot(CGRect(x: 0, y: foregroundViewSize.height, width: containerViewSize.width, height: foregroundViewSize.height))
+        
+        imageView = UIImageView(image: image)
+        let rotatedView = RotatedView(frame: imageView.frame)
+        rotatedView.tag = 1
+        rotatedView.layer.anchorPoint = CGPoint(x: 0.5, y: 0)
+        rotatedView.layer.transform = rotatedView.transform3d()
+        
+        rotatedView.addSubview(imageView)
+        animationView?.addSubview(rotatedView)
+        rotatedView.frame = CGRect(x: imageView.frame.origin.x, y: foregroundViewSize.height, width: containerViewSize.width, height: foregroundViewSize.height)
+        
+        // added other views
+        let itemHeight = (containerViewSize.height - 2 * foregroundViewSize.height) / CGFloat(itemCount - 2)
+        
+        if itemCount == 2 {
+            // decrease containerView height or increase itemCount
+            assert(containerViewSize.height - 2 * foregroundViewSize.height == 0, "contanerView.height too high")
+        } else {
+            // decrease containerView height or increase itemCount
+            assert(containerViewSize.height - 2 * foregroundViewSize.height >= itemHeight, "contanerView.height too high")
+        }
+        
+        var yPosition = 2 * foregroundViewSize.height
+        var tag = 2
+        for _ in 2 ..< itemCount {
+            image = containerView.pb_takeSnapshot(CGRect(x: 0, y: yPosition, width: containerViewSize.width, height: itemHeight))
+            
+            imageView = UIImageView(image: image)
+            let rotatedView = RotatedView(frame: imageView.frame)
+            
+            rotatedView.addSubview(imageView)
+            rotatedView.layer.anchorPoint = CGPoint(x: 0.5, y: 0)
+            rotatedView.layer.transform = rotatedView.transform3d()
+            animationView?.addSubview(rotatedView)
+            rotatedView.frame = CGRect(x: 0, y: yPosition, width: rotatedView.bounds.size.width, height: itemHeight)
+            rotatedView.tag = tag
+            
+            yPosition += itemHeight
+            tag += 1
+        }
+        
+        containerView.alpha = 0
+        
+        if let animationView = self.animationView {
+            // added back view
+            var previuosView: RotatedView?
+            for case let container as RotatedView in animationView.subviews.sorted(by: { $0.tag < $1.tag })
+                where container.tag > 0 && container.tag < animationView.subviews.count {
+                    previuosView?.addBackView(container.bounds.size.height, color: backViewColor)
+                    previuosView = container
+            }
+        }
+        animationItemViews = createAnimationItemView()
    }
    
-    let firstItemView = animationView.subviews.filter{$0.tag == 0}.first
-    
-    firstItemView?.layer.masksToBounds = true
-    DispatchQueue.main.asyncAfter(deadline: .now() + durations[0], execute: {
-      firstItemView?.layer.cornerRadius = 0
-    })
-    
-    DispatchQueue.main.asyncAfter(deadline: DispatchTime.now() + Double(Int64(delay * Double(NSEC_PER_SEC))) / Double(NSEC_PER_SEC), execute: {
-      self.animationView?.alpha = 0
-      self.containerView.alpha  = 1
-      completion?()
-    })
-  }
-  
-  func closeAnimation(_ completion: ((Void) -> Void)?) {
-    
-    removeImageItemsFromAnimationView()
-    addImageItemsToAnimationView()
-    
-    guard let animationItemViews = self.animationItemViews else {
-      fatalError()
+    fileprivate func removeImageItemsFromAnimationView() {
+        
+        guard let animationView = self.animationView else {
+            return
+        }
+        
+        animationView.subviews.forEach({ $0.removeFromSuperview() })
    }
    
-    animationView?.alpha = 1;
-    containerView.alpha  = 0;
+    // MARK: public
    
-    var durations: [TimeInterval] = durationSequence(.close).reversed()
-    
-    var delay: TimeInterval = 0
-    var timing                = kCAMediaTimingFunctionEaseIn
-    var from: CGFloat         = 0.0;
-    var to: CGFloat           = CGFloat.pi / 2
-    var hidden                = true
-    configureAnimationItems(.close)
-    
-    if durations.count < animationItemViews.count {
-      fatalError("wrong override func animationDuration(itemIndex:NSInteger, type:AnimationType)-> NSTimeInterval")
+    /// Unfold cell.
+    ///
+    /// - Parameters:
+    ///   - value: unfold = true; collapse = false.
+    ///   - animated: animate changes.
+    ///   - completion: A block object to be executed when the animation sequence ends.
+    open func unfold(_ value: Bool, animated: Bool = true, completion: (() -> Void)? = nil) {
+        if animated {
+            value ? openAnimation(completion) : closeAnimation(completion)
+        } else {
+            foregroundView.alpha = value ? 0 : 1
+            containerView.alpha = value ? 1 : 0
+        }
    }
-    for index in 0..<animationItemViews.count {
-      let animatedView = animationItemViews.reversed()[index]
-      
-      animatedView.foldingAnimation(timing, from: from, to: to, duration: durations[index], delay: delay, hidden: hidden)
-      
-      to     = to == 0.0 ? CGFloat.pi / 2 : 0.0
-      from   = from == 0.0 ? -CGFloat.pi / 2 : 0.0
-      timing = timing == kCAMediaTimingFunctionEaseIn ? kCAMediaTimingFunctionEaseOut : kCAMediaTimingFunctionEaseIn
-      hidden = !hidden
-      delay += durations[index]
-    }
-    DispatchQueue.main.asyncAfter(deadline: .now() + delay, execute: {
-      self.animationView?.alpha = 0
-      completion?()
-    })
    
-    let firstItemView = animationView?.subviews.filter{$0.tag == 0}.first
-    firstItemView?.layer.cornerRadius = 0
-    firstItemView?.layer.masksToBounds = true
-    if let durationFirst = durations.first {
-      DispatchQueue.main.asyncAfter(deadline: .now() + delay - durationFirst * 2, execute: {
-        firstItemView?.layer.cornerRadius = self.foregroundView.layer.cornerRadius
-        firstItemView?.setNeedsDisplay()
-        firstItemView?.setNeedsLayout()
-      })
+    open func isAnimating() -> Bool {
+        return animationView?.alpha == 1 ? true : false
+    }
+    
+    open var isUnfolded = false
+    
+    // MARK: Animations
+    
+    open func animationDuration(_ itemIndex: NSInteger, type: AnimationType) -> TimeInterval {
+        return type == .close ? durationsForCollapsedState[itemIndex] : durationsForExpandedState[itemIndex]
+    }
+    
+    open var durationsForExpandedState: [TimeInterval] = []
+    open var durationsForCollapsedState: [TimeInterval] = []
+    
+    func durationSequence(_ type: AnimationType) -> [TimeInterval] {
+        var durations = [TimeInterval]()
+        for i in 0 ..< itemCount - 1 {
+            let duration = animationDuration(i, type: type)
+            durations.append(TimeInterval(duration / 2.0))
+            durations.append(TimeInterval(duration / 2.0))
+        }
+        return durations
+    }
+    
+    public func openAnimation(_ completion: (() -> Void)?) {
+        isUnfolded = true
+        removeImageItemsFromAnimationView()
+        addImageItemsToAnimationView()
+        
+        animationView?.alpha = 1
+        containerView.alpha = 0
+        
+        let durations = durationSequence(.open)
+        
+        var delay: TimeInterval = 0
+        var timing = kCAMediaTimingFunctionEaseIn
+        var from: CGFloat = 0.0
+        var to: CGFloat = -CGFloat.pi / 2
+        var hidden = true
+        configureAnimationItems(.open)
+        
+        guard let animationItemViews = self.animationItemViews else {
+            return
+        }
+        
+        for index in 0 ..< animationItemViews.count {
+            let animatedView = animationItemViews[index]
+            
+            animatedView.foldingAnimation(timing, from: from, to: to, duration: durations[index], delay: delay, hidden: hidden)
+            
+            from = from == 0.0 ? CGFloat.pi / 2 : 0.0
+            to = to == 0.0 ? -CGFloat.pi / 2 : 0.0
+            timing = timing == kCAMediaTimingFunctionEaseIn ? kCAMediaTimingFunctionEaseOut : kCAMediaTimingFunctionEaseIn
+            hidden = !hidden
+            delay += durations[index]
+        }
+        
+        let firstItemView = animationView?.subviews.filter { $0.tag == 0 }.first
+        
+        firstItemView?.layer.masksToBounds = true
+        DispatchQueue.main.asyncAfter(deadline: .now() + durations[0], execute: {
+            firstItemView?.layer.cornerRadius = 0
+        })
+        
+        DispatchQueue.main.asyncAfter(deadline: .now() + delay) {
+            self.animationView?.alpha = 0
+            self.containerView.alpha = 1
+            completion?()
+        }
+    }
+    
+    public func closeAnimation(_ completion: (() -> Void)?) {
+        isUnfolded = false
+        removeImageItemsFromAnimationView()
+        addImageItemsToAnimationView()
+        
+        guard let animationItemViews = self.animationItemViews else {
+            fatalError()
+        }
+        
+        animationView?.alpha = 1
+        containerView.alpha = 0
+        
+        var durations: [TimeInterval] = durationSequence(.close).reversed()
+        
+        var delay: TimeInterval = 0
+        var timing = kCAMediaTimingFunctionEaseIn
+        var from: CGFloat = 0.0
+        var to: CGFloat = CGFloat.pi / 2
+        var hidden = true
+        configureAnimationItems(.close)
+        
+        if durations.count < animationItemViews.count {
+            fatalError("wrong override func animationDuration(itemIndex:NSInteger, type:AnimationType)-> NSTimeInterval")
+        }
+        for index in 0 ..< animationItemViews.count {
+            let animatedView = animationItemViews.reversed()[index]
+            
+            animatedView.foldingAnimation(timing, from: from, to: to, duration: durations[index], delay: delay, hidden: hidden)
+            
+            to = to == 0.0 ? CGFloat.pi / 2 : 0.0
+            from = from == 0.0 ? -CGFloat.pi / 2 : 0.0
+            timing = timing == kCAMediaTimingFunctionEaseIn ? kCAMediaTimingFunctionEaseOut : kCAMediaTimingFunctionEaseIn
+            hidden = !hidden
+            delay += durations[index]
+        }
+        DispatchQueue.main.asyncAfter(deadline: .now() + delay, execute: {
+            self.animationView?.alpha = 0
+            completion?()
+        })
+        
+        let firstItemView = animationView?.subviews.filter { $0.tag == 0 }.first
+        firstItemView?.layer.cornerRadius = 0
+        firstItemView?.layer.masksToBounds = true
+        if let durationFirst = durations.first {
+            DispatchQueue.main.asyncAfter(deadline: .now() + delay - durationFirst * 2, execute: {
+                firstItemView?.layer.cornerRadius = self.foregroundView.layer.cornerRadius
+                firstItemView?.setNeedsDisplay()
+                firstItemView?.setNeedsLayout()
+            })
+        }
    }
-  }
 }

-
 // MARK: RotatedView
-open class RotatedView: UIView {
-  var hiddenAfterAnimation = false
-  var backView: RotatedView?
-  
-  func addBackView(_ height: CGFloat, color:UIColor) {
-    let view                                       = RotatedView(frame: CGRect.zero)
-    view.backgroundColor                           = color
-    view.layer.anchorPoint                         = CGPoint.init(x: 0.5, y: 1)
-    view.layer.transform                           = view.transform3d()
-    view.translatesAutoresizingMaskIntoConstraints = false;
-    self.addSubview(view)
-    backView = view
-    
-    view.addConstraint(NSLayoutConstraint(item: view, attribute: .height, relatedBy: .equal, toItem: nil,attribute: .height,
-      multiplier: 1, constant: height))
-    
-    self.addConstraints([
-      NSLayoutConstraint(item: view, attribute: .top, relatedBy: .equal, toItem: self, attribute: .top, multiplier: 1,
-        constant: self.bounds.size.height - height + height / 2),
-      NSLayoutConstraint(item: view, attribute: .leading, relatedBy: .equal, toItem: self, attribute: .leading,
-        multiplier: 1, constant: 0),
-      NSLayoutConstraint(item: view, attribute: .trailing, relatedBy: .equal, toItem: self, attribute: .trailing,
-        multiplier: 1, constant: 0)
-      ])
-  }
-}

+open class RotatedView: UIView {
+    var hiddenAfterAnimation = false
+    var backView: RotatedView?
+    
+    func addBackView(_ height: CGFloat, color: UIColor) {
+        let view = RotatedView(frame: CGRect.zero)
+        view.backgroundColor = color
+        view.layer.anchorPoint = CGPoint(x: 0.5, y: 1)
+        view.layer.transform = view.transform3d()
+        view.translatesAutoresizingMaskIntoConstraints = false
+        self.addSubview(view)
+        backView = view
+        
+        view.addConstraint(NSLayoutConstraint(item: view, attribute: .height, relatedBy: .equal, toItem: nil, attribute: .height,
+                                              multiplier: 1, constant: height))
+        
+        self.addConstraints([
+            NSLayoutConstraint(item: view, attribute: .top, relatedBy: .equal, toItem: self, attribute: .top, multiplier: 1,
+                               constant: self.bounds.size.height - height + height / 2),
+            NSLayoutConstraint(item: view, attribute: .leading, relatedBy: .equal, toItem: self, attribute: .leading,
+                               multiplier: 1, constant: 0),
+            NSLayoutConstraint(item: view, attribute: .trailing, relatedBy: .equal, toItem: self, attribute: .trailing,
+                               multiplier: 1, constant: 0),
+            ])
+    }
+}

 extension RotatedView: CAAnimationDelegate {
-  
-  func rotatedX(_ angle : CGFloat) {
-    var allTransofrom    = CATransform3DIdentity;
-    let rotateTransform  = CATransform3DMakeRotation(angle, 1, 0, 0)
-    allTransofrom        = CATransform3DConcat(allTransofrom, rotateTransform)
-    allTransofrom        = CATransform3DConcat(allTransofrom, transform3d())
-    self.layer.transform = allTransofrom
-  }
-  
-  func transform3d() -> CATransform3D {
-    var transform = CATransform3DIdentity
-    transform.m34 = 2.5 / -2000;
-    return transform
-  }
-  
-  // MARK: animations
-  func foldingAnimation(_ timing: String, from: CGFloat, to: CGFloat, duration: TimeInterval, delay:TimeInterval, hidden:Bool) {
    
-    let rotateAnimation = CABasicAnimation(keyPath: "transform.rotation.x")
-    rotateAnimation.timingFunction      = CAMediaTimingFunction(name: timing)
-    rotateAnimation.fromValue           = (from)
-    rotateAnimation.toValue             = (to)
-    rotateAnimation.duration            = duration
-    rotateAnimation.delegate            = self;
-    rotateAnimation.fillMode            = kCAFillModeForwards
-    rotateAnimation.isRemovedOnCompletion = false;
-    rotateAnimation.beginTime           = CACurrentMediaTime() + delay
+    func rotatedX(_ angle: CGFloat) {
+        var allTransofrom = CATransform3DIdentity
+        let rotateTransform = CATransform3DMakeRotation(angle, 1, 0, 0)
+        allTransofrom = CATransform3DConcat(allTransofrom, rotateTransform)
+        allTransofrom = CATransform3DConcat(allTransofrom, transform3d())
+        self.layer.transform = allTransofrom
+    }
    
-    self.hiddenAfterAnimation = hidden
+    func transform3d() -> CATransform3D {
+        var transform = CATransform3DIdentity
+        transform.m34 = 2.5 / -2000
+        return transform
+    }
    
-    self.layer.add(rotateAnimation, forKey: "rotation.x")
-  }
-  
-  public func animationDidStart(_ anim: CAAnimation) {
-    self.layer.shouldRasterize = true
-    self.alpha = 1
-  }
-  
-  public func animationDidStop(_ anim: CAAnimation, finished flag: Bool) {
-    if hiddenAfterAnimation {
-      self.alpha = 0
+    // MARK: animations
+    
+    func foldingAnimation(_ timing: String, from: CGFloat, to: CGFloat, duration: TimeInterval, delay: TimeInterval, hidden: Bool) {
+        
+        let rotateAnimation = CABasicAnimation(keyPath: "transform.rotation.x")
+        rotateAnimation.timingFunction = CAMediaTimingFunction(name: timing)
+        rotateAnimation.fromValue = from
+        rotateAnimation.toValue = to
+        rotateAnimation.duration = duration
+        rotateAnimation.delegate = self
+        rotateAnimation.fillMode = kCAFillModeForwards
+        rotateAnimation.isRemovedOnCompletion = false
+        rotateAnimation.beginTime = CACurrentMediaTime() + delay
+        
+        self.hiddenAfterAnimation = hidden
+        
+        self.layer.add(rotateAnimation, forKey: "rotation.x")
+    }
+    
+    public func animationDidStart(_: CAAnimation) {
+        self.layer.shouldRasterize = true
+        self.alpha = 1
+    }
+    
+    public func animationDidStop(_: CAAnimation, finished _: Bool) {
+        if hiddenAfterAnimation {
+            self.alpha = 0
+        }
+        self.layer.removeAllAnimations()
+        self.layer.shouldRasterize = false
+        self.rotatedX(CGFloat(0))
    }
-    self.layer.removeAllAnimations()
-    self.layer.shouldRasterize = false
-    self.rotatedX(CGFloat(0))
-  }
 }

-extension UIView {
-  func pb_takeSnapshot(_ frame: CGRect) -> UIImage? {
-    UIGraphicsBeginImageContextWithOptions(frame.size, false, 0.0)
+private extension UIView {
    
-    guard let context = UIGraphicsGetCurrentContext() else { return nil }
-    context.translateBy(x: frame.origin.x * -1, y: frame.origin.y * -1)
-    
-    guard let currentContext = UIGraphicsGetCurrentContext() else {
-      return nil
+    func pb_takeSnapshot(_ frame: CGRect) -> UIImage? {
+        UIGraphicsBeginImageContextWithOptions(frame.size, false, 0)
+        
+        guard let context = UIGraphicsGetCurrentContext() else { return nil }
+        context.translateBy(x: frame.origin.x * -1, y: frame.origin.y * -1)
+        
+        layer.render(in: context)
+        let image = UIGraphicsGetImageFromCurrentImageContext()
+        UIGraphicsEndImageContext()
+        
+        return image
    }
-    
-    self.layer.render(in: currentContext)
-    let image = UIGraphicsGetImageFromCurrentImageContext()
-    UIGraphicsEndImageContext()
-    
-    return image
-  }
 }
@@ -1,45 +0,0 @@
-//
-//  FoldingCellTests.swift
-//  FoldingCellTests
-//
-//  Created by Alex K. on 25/01/16.
-//  Copyright © 2016 Alex K. All rights reserved.
-//
-
-import XCTest
-
-class FoldingCellTests: XCTestCase {
-    
-    var viewController : UITableViewController!
-    
-    override func setUp() {
-        super.setUp()
-        
-        let storyboard = UIStoryboard(name: "Main", bundle: nil)
-        viewController = storyboard.instantiateViewController(withIdentifier: "MainTableViewController") as! UITableViewController
-        viewController.beginAppearanceTransition(true, animated: false)
-    }
-    
-    override func tearDown() {
-         viewController.endAppearanceTransition()
-        super.tearDown()
-    }
-    
-    func testExample() {
-        let tableView = viewController.tableView
-        
-        for case let cell as FoldingCell in (tableView?.visibleCells)! {
-            XCTAssertTrue(cell.itemCount >= 2)
-        }
-        
-        
-    }
-    
-    func testPerformanceExample() {
-        // This is an example of a performance test case.
-        self.measure {
-            // Put the code you want to measure the time of here.
-        }
-    }
-    
-}
@@ -1,24 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
-<plist version="1.0">
-<dict>
-	<key>CFBundleDevelopmentRegion</key>
-	<string>en</string>
-	<key>CFBundleExecutable</key>
-	<string>$(EXECUTABLE_NAME)</string>
-	<key>CFBundleIdentifier</key>
-	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
-	<key>CFBundleInfoDictionaryVersion</key>
-	<string>6.0</string>
-	<key>CFBundleName</key>
-	<string>$(PRODUCT_NAME)</string>
-	<key>CFBundlePackageType</key>
-	<string>BNDL</string>
-	<key>CFBundleShortVersionString</key>
-	<string>1.0</string>
-	<key>CFBundleSignature</key>
-	<string>????</string>
-	<key>CFBundleVersion</key>
-	<string>1</string>
-</dict>
-</plist>
@@ -1,34 +1,33 @@
-[![header](https://raw.githubusercontent.com/Ramotion/folding-cell/master/header.png)](https://business.ramotion.com?utm_source=gthb&utm_medium=special&utm_campaign=foolding-cell-logo)
+![header](./header.png)
+![Animation](./Screenshots/folding-cell.gif)
+
 # FoldingCell
 [![CocoaPods](https://img.shields.io/cocoapods/p/FoldingCell.svg)](https://cocoapods.org/pods/FoldingCell)
 [![CocoaPods](https://img.shields.io/cocoapods/v/FoldingCell.svg)](http://cocoapods.org/pods/FoldingCell)
-[![CocoaPods](https://img.shields.io/cocoapods/metrics/doc-percent/FoldingCell.svg)](https://cdn.rawgit.com/Ramotion/folding-cell/master/docs/index.html)
-[![Carthage compatible](https://img.shields.io/badge/Carthage-compatible-4BC51D.svg?style=flat)](https://github.com/Ramotion/folding-cell)
 [![Twitter](https://img.shields.io/badge/Twitter-@Ramotion-blue.svg?style=flat)](http://twitter.com/Ramotion)
 [![Travis](https://img.shields.io/travis/Ramotion/folding-cell.svg)](https://travis-ci.org/Ramotion/folding-cell)
 [![codebeat badge](https://codebeat.co/badges/6f67da5d-c416-4bac-9fb7-c2dc938feedc)](https://codebeat.co/projects/github-com-ramotion-folding-cell)
 [![Carthage compatible](https://img.shields.io/badge/Carthage-compatible-4BC51D.svg?style=flat)](https://github.com/Carthage/Carthage)
+[![Swift 4.0](https://img.shields.io/badge/Swift-4.0-green.svg?style=flat)](https://developer.apple.com/swift/)
 [![Analytics](https://ga-beacon.appspot.com/UA-84973210-1/ramotion/folding-cell)](https://github.com/igrigorik/ga-beacon)

-## About
-This project is maintained by Ramotion, Inc.<br>
-We specialize in the designing and coding of custom UI for Mobile Apps and Websites.<br><br>**Looking for developers for your project?** 
+# Check this library on other platforms:
+<a href="https://github.com/Ramotion/folding-cell-android"> 
+<img src="https://github.com/ramotion/navigation-stack/raw/master/Android_Java@2x.png" width="178" height="81"></a>

-<a href="https://business.ramotion.com?utm_source=gthb&utm_medium=special&utm_campaign=foolding-cell-contact-us/#Get_in_Touch" > <img src="https://github.com/Ramotion/navigation-stack/raw/master/contact_our_team@2x.png" width="150" height="30"></a>
+**Looking for developers for your project?**<br>
+This project is maintained by Ramotion, Inc. We specialize in the designing and coding of custom UI for Mobile Apps and Websites.

-[![Animation](https://raw.githubusercontent.com/Ramotion/folding-cell/master/Screenshots/folding-cell.gif)](https://dribbble.com/shots/2121350-Delivery-Card)
+<a href="https://dev.ramotion.com/?utm_source=gthb&utm_medium=special&utm_campaign=folding-cell-contact-us">
+<img src="https://github.com/ramotion/gliding-collection/raw/master/contact_our_team@2x.png" width="187" height="34"></a> <br>


 The [iPhone mockup](https://store.ramotion.com?utm_source=gthb&utm_medium=special&utm_campaign=folding-cell) available [here](https://store.ramotion.com?utm_source=gthb&utm_medium=special&utm_campaign=folding-cell).

-## Try this UI control in action
-
-<a href="https://itunes.apple.com/app/apple-store/id1182360240?pt=550053&ct=gthb-folding-cell&mt=8" > <img src="https://github.com/Ramotion/navigation-stack/raw/master/Download_on_the_App_Store_Badge_US-UK_135x40.png" width="170" height="58"></a>
-
 ## Requirements

 - iOS 8.0+
- Xcode 7.3
+- Xcode 9.0+

 ## Installation

@@ -36,7 +35,7 @@ Just add the FoldingCell.swift file to your project.

 or use [CocoaPods](https://cocoapods.org) with Podfile:
 ```
-pod 'FoldingCell', '~> 2.0.3' 
+pod 'FoldingCell'
 ```
 or [Carthage](https://github.com/Carthage/Carthage) users can simply add Mantle to their `Cartfile`:
 ```
@@ -151,8 +150,7 @@ fileprivate struct C {
    }
 ```

-
-#### if don't use storyboard and xib files
+## if don't use storyboard and xib files

 Create foregroundView and containerView from code (steps 2 - 3) look example:
 [Folding-cell-programmatically](https://github.com/ober01/Folding-cell-programmatically)
@@ -162,8 +160,19 @@ Create foregroundView and containerView from code (steps 2 - 3) look example:
 Folding cell is released under the MIT license.
 See [LICENSE](./LICENSE) for details.

+<br>

-## Follow Us
+# Get the Showroom App for iOS to give it a try
+Try this UI component and more like this in our iOS app. Contact us if interested.

-[![Twitter URL](https://img.shields.io/twitter/url/http/shields.io.svg?style=social)](https://twitter.com/intent/tweet?text=https://github.com/ramotion/foolding-cell)
-[![Twitter Follow](https://img.shields.io/twitter/follow/ramotion.svg?style=social)](https://twitter.com/ramotion)
+<a href="https://itunes.apple.com/app/apple-store/id1182360240?pt=550053&ct=folding-cell&mt=8" >
+<img src="https://github.com/ramotion/gliding-collection/raw/master/app_store@2x.png" width="117" height="34"></a>
+
+<a href="https://dev.ramotion.com/?utm_source=gthb&utm_medium=special&utm_campaign=folding-cell-contact-us">
+<img src="https://github.com/ramotion/gliding-collection/raw/master/contact_our_team@2x.png" width="187" height="34"></a>
+<br>
+<br>
+
+Follow us for the latest updates<br>
+<a href="https://goo.gl/rPFpid" >
+<img src="https://i.imgur.com/ziSqeSo.png/" width="156" height="28"></a>
Author	SHA1	Message	Date
Alex K	a191c4bc05	refactoring, remove guard with fatal error	2018-04-02 10:15:04 +03:00
Alex K	cbe678277d	update podspec	2018-03-27 16:37:34 +03:00
Alex K	a760de74ee	Fixes #126 make closeAnimation and opentAnimation methods public	2018-03-27 16:35:20 +03:00
Alex K	7d639d3332	update podspec	2018-03-27 16:32:23 +03:00
Alex K	dc52176452	Fixes #62	2018-03-27 15:57:42 +03:00
Alex K	259e726146	Merge branch 'master' of github.com:Ramotion/folding-cell	2018-03-26 15:22:58 +03:00
Alex K	381fe89df9	Fix warning "The use of Swift 3 @objc inference in Swift 4 mode is deprecated. Please address deprecated @objc inference warnings"	2018-03-26 15:22:49 +03:00
Alex	99d7b642c9	Update README.md	2018-03-20 10:08:19 +03:00
Alex	d5aa310bd6	Update README.md remove duplicate Carthage badge	2018-03-12 14:07:00 +03:00
Ramotion	df05fb3424	Update README.md	2018-03-01 11:31:32 +03:00
Ramotion	f144e16433	Update README.md	2018-02-28 14:42:44 +03:00
Alex K	c9c710f485	Merge branch 'master' of github.com:Ramotion/folding-cell	2018-02-27 17:13:13 +03:00
Alex K	49611acdf9	remove warnings in demo project	2018-02-27 17:13:06 +03:00
Denis Pakhaliuk	283afd04b2	Update README.md	2018-02-21 12:05:05 +03:00
Alex K	7cf93be5b7	remove unused code	2018-02-20 16:16:33 +03:00
Alex K	ae01474fa4	update podspec	2018-02-14 09:33:54 +03:00
Alex K	16fa9ad54d	remove unused code	2018-02-14 09:32:32 +03:00
Alex K	40d58abd2b	update podspec	2018-02-07 11:53:05 +03:00
Alex K	09c886e9a2	Fatal error message has improved.	2018-02-07 09:26:21 +03:00
Alex	814030c8cb	Update README.md	2018-01-30 11:34:12 +03:00
Alex K	fd985711a6	Merge branch 'refactoring' # Conflicts: # FoldingCell/FoldingCell-Demo/Base.lproj/Main.storyboard # FoldingCell/FoldingCell.xcodeproj/project.pbxproj # FoldingCell/FoldingCell/FoldingCell.swift	2018-01-23 11:06:04 +03:00
Alex K	f48738aeda	fix demo project remove unused code	2018-01-23 11:01:13 +03:00
i.kolpachkov	da2a94c3be	bump pod version	2018-01-18 17:44:17 +03:00
i.kolpachkov	ecac481f39	change swift format, add launch screen, update travis CI config	2018-01-18 17:43:00 +03:00
i.kolpachkov	f4a5de56d1	disable @objc inference	2018-01-15 18:36:48 +03:00
i.kolpachkov	04a06c69cc	swift 4 migration, small cleanup	2018-01-15 18:34:37 +03:00
Juri Vasylenko	2809a7ae44	Update README.md	2017-11-11 18:33:33 +03:00
Alex K	d9d86e1bbf	update podspec and readme	2017-10-23 09:47:01 +03:00
Alex	5e5639f5d0	Merge pull request #130 from ohyes1h/master Fix errors and warnings when migrating to swift 4	2017-10-23 09:18:10 +03:00
ohyes1h	02d5d8431d	Fix errors and warnings when migrating to swift 4	2017-10-22 02:12:59 +08:00
Travis CI	1d20e0bd06	reorganize readme	2017-07-28 15:46:26 +03:00
Alex	4be8ef9b1d	Update README.md	2017-06-27 11:47:41 +03:00
Abdurahim Jauzee	dd71f7ba65	update podspec	2017-05-31 18:38:52 +03:00
Abdurahim Jauzee	fecd05d93f	- add `unfold(_:animated:completion)` method - deprecate `selectedAnimation` because it’s name is not clear - minor improvements	2017-05-31 18:38:06 +03:00
Abdurahim Jauzee	77e99b8708	update podspec	2017-05-31 12:41:22 +03:00
Abdurahim Jauzee	5254378736	remove unnecessary guard statement	2017-05-31 12:39:34 +03:00
Abdurahim Jauzee	74e0ca7f7b	update podspec	2017-05-31 12:17:09 +03:00
Abdurahim Jauzee	ef3307924a	use `animationDuration` method	2017-05-31 12:14:37 +03:00
Abdurahim Jauzee	39377ad181	revert `animationDuration` method for backward compatibility	2017-05-31 12:09:19 +03:00
Abdurahim Jauzee	1cf7a8124f	fix typos	2017-05-31 12:08:50 +03:00