Merge branch 'develop'

Fixed animation stopping issue after view controller disappears

.github/stale.yml

@@ -0,0 +1,15 @@
+# Number of days of inactivity before an issue becomes stale
+daysUntilStale: 60
+# Number of days of inactivity before a stale issue is closed
+daysUntilClose: 7
+# Issues with these labels will never be considered stale
+exemptLabels:
+  - work in progress
+staleLabel: given up
+# Comment to post when marking an issue as stale. Set to `false` to disable
+markComment: >
+  This issue has been automatically marked as stale because it has not had
+  recent activity. It will be closed if no further activity occurs. Thank you
+  for your contributions.
+# Comment to post when closing a stale issue. Set to `false` to disable
+closeComment: false

CHANGELOG.md

@@ -3,8 +3,22 @@ All notable changes to this project will be documented in this file
 
 ## Next version
 
+### Improvements
+- Fix completion call in .none transition style while hide skeletons. (thanks @aadudyrev)
+
+## [Transitions (1.8)](https://github.com/Juanpe/SkeletonView/releases/tag/1.8)
+
 ### New
+
 - Adding swift news to mentioned section (thanks @osterbergmarcus).
+- Create `SkeletonTransitionStyle`. Now, you can animate transition when you show or hide skeletons. (thanks @pontusjacobsson)
+
+### Improvements
+- Refactor some methods.
+
+### Bug fixes
+- Solved issues.
+ [#175](https://github.com/Juanpe/SkeletonView/issues/175) Swift Package Manager version format
 
 ## [Layout update (1.7)](https://github.com/Juanpe/SkeletonView/releases/tag/1.7)
 

Example/CollectionView/ViewController.swift

@@ -81,7 +81,7 @@ class ViewController: UIViewController {
     }
     
     func hideSkeleton() {
-        view.hideSkeleton(transition: .crossDisolve(transitionDurationStepper.value))
+        view.hideSkeleton(transition: .crossDissolve(transitionDurationStepper.value))
     }
     
     func refreshSkeleton() {

Example/TableView/Base.lproj/Main.storyboard

@@ -1,16 +1,14 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="14490.70" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="BYZ-38-t0r">
-    <device id="retina4_7" orientation="portrait">
-        <adaptation id="fullscreen"/>
-    </device>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="14868" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="Va7-1y-Tel">
+    <device id="retina4_7" orientation="portrait" appearance="light"/>
     <dependencies>
         <deployment identifier="iOS"/>
-        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="14490.49"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="14824"/>
         <capability name="Safe area layout guides" minToolsVersion="9.0"/>
         <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
     </dependencies>
     <scenes>
-        <!--View Controller-->
+        <!--Item-->
         <scene sceneID="tne-QT-ifu">
             <objects>
                 <viewController id="BYZ-38-t0r" customClass="ViewController" customModule="SkeletonViewExample" customModuleProvider="target" sceneMemberID="viewController">
@@ -18,74 +16,8 @@
                         <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
                         <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
                         <subviews>
-                            <tableView clipsSubviews="YES" contentMode="scaleToFill" alwaysBounceVertical="YES" dataMode="prototypes" style="plain" separatorStyle="none" rowHeight="-1" estimatedRowHeight="-1" sectionHeaderHeight="28" sectionFooterHeight="28" translatesAutoresizingMaskIntoConstraints="NO" id="UCB-SP-lQk">
-                                <rect key="frame" x="0.0" y="263" width="375" height="244"/>
-                                <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
-                                <color key="separatorColor" red="0.1061807256" green="0.84678786989999999" blue="0.031482450150000001" alpha="1" colorSpace="custom" customColorSpace="displayP3"/>
-                                <prototypes>
-                                    <tableViewCell clipsSubviews="YES" contentMode="scaleToFill" preservesSuperviewLayoutMargins="YES" selectionStyle="default" indentationWidth="10" reuseIdentifier="CellIdentifier" rowHeight="120" id="2dN-Bd-tdy" customClass="Cell" customModule="SkeletonViewExample" customModuleProvider="target">
-                                        <rect key="frame" x="0.0" y="28" width="375" height="120"/>
-                                        <autoresizingMask key="autoresizingMask"/>
-                                        <tableViewCellContentView key="contentView" opaque="NO" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="center" preservesSuperviewLayoutMargins="YES" insetsLayoutMarginsFromSafeArea="NO" tableViewCell="2dN-Bd-tdy" id="7IN-F3-Mr6">
-                                            <rect key="frame" x="0.0" y="0.0" width="375" height="120"/>
-                                            <autoresizingMask key="autoresizingMask"/>
-                                            <subviews>
-                                                <imageView userInteractionEnabled="NO" contentMode="scaleToFill" horizontalHuggingPriority="251" verticalHuggingPriority="251" image="avatar" translatesAutoresizingMaskIntoConstraints="NO" id="oiE-tt-nc2">
-                                                    <rect key="frame" x="15" y="18" width="82" height="82"/>
-                                                    <color key="backgroundColor" red="0.56078431370000004" green="0.59607843140000005" blue="0.7843137255" alpha="0.90709546230000004" colorSpace="calibratedRGB"/>
-                                                    <constraints>
-                                                        <constraint firstAttribute="width" constant="82" id="4j0-PU-CmN"/>
-                                                        <constraint firstAttribute="height" constant="82" id="iqE-Lc-FOj"/>
-                                                    </constraints>
-                                                    <userDefinedRuntimeAttributes>
-                                                        <userDefinedRuntimeAttribute type="boolean" keyPath="isSkeletonable" value="YES"/>
-                                                    </userDefinedRuntimeAttributes>
-                                                </imageView>
-                                                <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Label" textAlignment="natural" lineBreakMode="tailTruncation" numberOfLines="15" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="VhU-1t-AaI">
-                                                    <rect key="frame" x="118" y="29" width="237" height="20.5"/>
-                                                    <constraints>
-                                                        <constraint firstAttribute="height" relation="lessThanOrEqual" constant="71" id="HRL-cI-ieC"/>
-                                                    </constraints>
-                                                    <fontDescription key="fontDescription" type="system" pointSize="17"/>
-                                                    <nil key="textColor"/>
-                                                    <nil key="highlightedColor"/>
-                                                    <userDefinedRuntimeAttributes>
-                                                        <userDefinedRuntimeAttribute type="boolean" keyPath="isSkeletonable" value="YES"/>
-                                                        <userDefinedRuntimeAttribute type="number" keyPath="linesCornerRadius">
-                                                            <integer key="value" value="0"/>
-                                                        </userDefinedRuntimeAttribute>
-                                                    </userDefinedRuntimeAttributes>
-                                                </label>
-                                            </subviews>
-                                            <constraints>
-                                                <constraint firstItem="oiE-tt-nc2" firstAttribute="leading" secondItem="7IN-F3-Mr6" secondAttribute="leadingMargin" id="1be-ak-AH1"/>
-                                                <constraint firstItem="oiE-tt-nc2" firstAttribute="top" secondItem="7IN-F3-Mr6" secondAttribute="topMargin" constant="7" id="EKn-ST-LDX"/>
-                                                <constraint firstAttribute="trailingMargin" secondItem="VhU-1t-AaI" secondAttribute="trailing" constant="5" id="I7C-Bq-mfK"/>
-                                                <constraint firstItem="VhU-1t-AaI" firstAttribute="leading" secondItem="oiE-tt-nc2" secondAttribute="trailing" constant="21" id="Ojr-Kz-1k6"/>
-                                                <constraint firstItem="VhU-1t-AaI" firstAttribute="top" secondItem="7IN-F3-Mr6" secondAttribute="topMargin" constant="18" id="ZW6-JY-S4c"/>
-                                            </constraints>
-                                            <userDefinedRuntimeAttributes>
-                                                <userDefinedRuntimeAttribute type="boolean" keyPath="isSkeletonable" value="YES"/>
-                                            </userDefinedRuntimeAttributes>
-                                        </tableViewCellContentView>
-                                        <userDefinedRuntimeAttributes>
-                                            <userDefinedRuntimeAttribute type="boolean" keyPath="isSkeletonable" value="YES"/>
-                                        </userDefinedRuntimeAttributes>
-                                        <connections>
-                                            <outlet property="avatar" destination="oiE-tt-nc2" id="Dkh-R5-Qhu"/>
-                                            <outlet property="label1" destination="VhU-1t-AaI" id="kUW-HV-KrD"/>
-                                        </connections>
-                                    </tableViewCell>
-                                </prototypes>
-                                <userDefinedRuntimeAttributes>
-                                    <userDefinedRuntimeAttribute type="boolean" keyPath="isSkeletonable" value="NO"/>
-                                </userDefinedRuntimeAttributes>
-                                <connections>
-                                    <outlet property="dataSource" destination="BYZ-38-t0r" id="Hxi-nC-gbY"/>
-                                </connections>
-                            </tableView>
-                            <view contentMode="scaleToFill" translatesAutoresizingMaskIntoConstraints="NO" id="F9K-jU-100">
-                                <rect key="frame" x="0.0" y="20" width="375" height="243"/>
+                            <view contentMode="scaleToFill" translatesAutoresizingMaskIntoConstraints="NO" id="F9K-jU-100" userLabel="ContainerView">
+                                <rect key="frame" x="0.0" y="0.0" width="375" height="243"/>
                                 <subviews>
                                     <textView clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="scaleToFill" textAlignment="natural" translatesAutoresizingMaskIntoConstraints="NO" id="e9V-mk-xH0">
                                         <rect key="frame" x="45" y="142" width="287" height="78"/>
@@ -132,11 +64,80 @@
                                     <userDefinedRuntimeAttribute type="boolean" keyPath="isSkeletonable" value="YES"/>
                                 </userDefinedRuntimeAttributes>
                             </view>
+                            <tableView clipsSubviews="YES" contentMode="scaleToFill" alwaysBounceVertical="YES" dataMode="prototypes" style="plain" separatorStyle="none" rowHeight="-1" estimatedRowHeight="-1" sectionHeaderHeight="28" sectionFooterHeight="28" translatesAutoresizingMaskIntoConstraints="NO" id="UCB-SP-lQk">
+                                <rect key="frame" x="0.0" y="243" width="375" height="215"/>
+                                <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
+                                <color key="separatorColor" red="0.1061807256" green="0.84678786989999999" blue="0.031482450150000001" alpha="1" colorSpace="custom" customColorSpace="displayP3"/>
+                                <prototypes>
+                                    <tableViewCell clipsSubviews="YES" contentMode="scaleToFill" preservesSuperviewLayoutMargins="YES" selectionStyle="default" indentationWidth="10" reuseIdentifier="CellIdentifier" rowHeight="120" id="2dN-Bd-tdy" customClass="Cell" customModule="SkeletonViewExample" customModuleProvider="target">
+                                        <rect key="frame" x="0.0" y="28" width="375" height="120"/>
+                                        <autoresizingMask key="autoresizingMask"/>
+                                        <tableViewCellContentView key="contentView" opaque="NO" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="center" preservesSuperviewLayoutMargins="YES" insetsLayoutMarginsFromSafeArea="NO" tableViewCell="2dN-Bd-tdy" id="7IN-F3-Mr6">
+                                            <rect key="frame" x="0.0" y="0.0" width="375" height="120"/>
+                                            <autoresizingMask key="autoresizingMask"/>
+                                            <subviews>
+                                                <imageView userInteractionEnabled="NO" contentMode="scaleToFill" horizontalHuggingPriority="251" verticalHuggingPriority="251" image="avatar" translatesAutoresizingMaskIntoConstraints="NO" id="oiE-tt-nc2">
+                                                    <rect key="frame" x="15" y="18" width="82" height="82"/>
+                                                    <color key="backgroundColor" red="0.56078431370000004" green="0.59607843140000005" blue="0.7843137255" alpha="0.90709546230000004" colorSpace="calibratedRGB"/>
+                                                    <constraints>
+                                                        <constraint firstAttribute="width" constant="82" id="4j0-PU-CmN"/>
+                                                        <constraint firstAttribute="height" constant="82" id="iqE-Lc-FOj"/>
+                                                    </constraints>
+                                                    <userDefinedRuntimeAttributes>
+                                                        <userDefinedRuntimeAttribute type="boolean" keyPath="isSkeletonable" value="YES"/>
+                                                    </userDefinedRuntimeAttributes>
+                                                </imageView>
+                                                <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Label" textAlignment="natural" lineBreakMode="tailTruncation" numberOfLines="0" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="VhU-1t-AaI" userLabel="Label">
+                                                    <rect key="frame" x="118" y="29" width="237" height="20.5"/>
+                                                    <constraints>
+                                                        <constraint firstAttribute="height" relation="lessThanOrEqual" constant="71" id="HRL-cI-ieC"/>
+                                                    </constraints>
+                                                    <fontDescription key="fontDescription" type="system" pointSize="17"/>
+                                                    <nil key="textColor"/>
+                                                    <nil key="highlightedColor"/>
+                                                    <userDefinedRuntimeAttributes>
+                                                        <userDefinedRuntimeAttribute type="boolean" keyPath="isSkeletonable" value="YES"/>
+                                                        <userDefinedRuntimeAttribute type="number" keyPath="linesCornerRadius">
+                                                            <integer key="value" value="5"/>
+                                                        </userDefinedRuntimeAttribute>
+                                                        <userDefinedRuntimeAttribute type="number" keyPath="lastLineFillPercent">
+                                                            <integer key="value" value="20"/>
+                                                        </userDefinedRuntimeAttribute>
+                                                    </userDefinedRuntimeAttributes>
+                                                </label>
+                                            </subviews>
+                                            <constraints>
+                                                <constraint firstItem="oiE-tt-nc2" firstAttribute="leading" secondItem="7IN-F3-Mr6" secondAttribute="leadingMargin" id="1be-ak-AH1"/>
+                                                <constraint firstItem="oiE-tt-nc2" firstAttribute="top" secondItem="7IN-F3-Mr6" secondAttribute="topMargin" constant="7" id="EKn-ST-LDX"/>
+                                                <constraint firstAttribute="trailingMargin" secondItem="VhU-1t-AaI" secondAttribute="trailing" constant="5" id="I7C-Bq-mfK"/>
+                                                <constraint firstItem="VhU-1t-AaI" firstAttribute="leading" secondItem="oiE-tt-nc2" secondAttribute="trailing" constant="21" id="Ojr-Kz-1k6"/>
+                                                <constraint firstItem="VhU-1t-AaI" firstAttribute="top" secondItem="7IN-F3-Mr6" secondAttribute="topMargin" constant="18" id="ZW6-JY-S4c"/>
+                                            </constraints>
+                                            <userDefinedRuntimeAttributes>
+                                                <userDefinedRuntimeAttribute type="boolean" keyPath="isSkeletonable" value="YES"/>
+                                            </userDefinedRuntimeAttributes>
+                                        </tableViewCellContentView>
+                                        <userDefinedRuntimeAttributes>
+                                            <userDefinedRuntimeAttribute type="boolean" keyPath="isSkeletonable" value="YES"/>
+                                        </userDefinedRuntimeAttributes>
+                                        <connections>
+                                            <outlet property="avatar" destination="oiE-tt-nc2" id="Dkh-R5-Qhu"/>
+                                            <outlet property="label1" destination="VhU-1t-AaI" id="kUW-HV-KrD"/>
+                                        </connections>
+                                    </tableViewCell>
+                                </prototypes>
+                                <userDefinedRuntimeAttributes>
+                                    <userDefinedRuntimeAttribute type="boolean" keyPath="isSkeletonable" value="NO"/>
+                                </userDefinedRuntimeAttributes>
+                                <connections>
+                                    <outlet property="dataSource" destination="BYZ-38-t0r" id="Hxi-nC-gbY"/>
+                                </connections>
+                            </tableView>
                             <view contentMode="scaleToFill" translatesAutoresizingMaskIntoConstraints="NO" id="XgY-1a-UGc">
-                                <rect key="frame" x="0.0" y="507" width="375" height="160"/>
+                                <rect key="frame" x="0.0" y="458" width="375" height="160"/>
                                 <subviews>
                                     <segmentedControl opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="left" contentVerticalAlignment="top" segmentControlStyle="plain" selectedSegmentIndex="0" translatesAutoresizingMaskIntoConstraints="NO" id="xOL-Sq-r4i">
-                                        <rect key="frame" x="20" y="23" width="135" height="29"/>
+                                        <rect key="frame" x="20" y="23" width="145" height="32"/>
                                         <segments>
                                             <segment title="Solid"/>
                                             <segment title="Gradient"/>
@@ -189,13 +190,13 @@
                                         </connections>
                                     </button>
                                     <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Fade Duration: 0 sec" textAlignment="right" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="mrw-PM-jJJ">
-                                        <rect key="frame" x="113.5" y="128.5" width="141.5" height="18"/>
+                                        <rect key="frame" x="113.5" y="130" width="141.5" height="18"/>
                                         <fontDescription key="fontDescription" type="system" pointSize="15"/>
                                         <nil key="textColor"/>
                                         <nil key="highlightedColor"/>
                                     </label>
                                     <stepper opaque="NO" contentMode="scaleToFill" horizontalHuggingPriority="750" verticalHuggingPriority="750" contentHorizontalAlignment="center" contentVerticalAlignment="center" maximumValue="5" stepValue="0.25" translatesAutoresizingMaskIntoConstraints="NO" id="l4N-LL-ZrJ">
-                                        <rect key="frame" x="263" y="123" width="94" height="29"/>
+                                        <rect key="frame" x="263" y="123" width="94" height="32"/>
                                         <connections>
                                             <action selector="transitionDurationStepperAction:" destination="BYZ-38-t0r" eventType="valueChanged" id="jPN-df-fNs"/>
                                         </connections>
@@ -244,6 +245,7 @@
                             <userDefinedRuntimeAttribute type="boolean" keyPath="isSkeletonable" value="NO"/>
                         </userDefinedRuntimeAttributes>
                     </view>
+                    <tabBarItem key="tabBarItem" title="Item" id="wQY-ap-3n3"/>
                     <navigationItem key="navigationItem" id="BEI-dU-kr2"/>
                     <connections>
                         <outlet property="avatarImage" destination="nMj-pU-5wJ" id="9fa-Z7-vYi"/>
@@ -258,7 +260,42 @@
                 </viewController>
                 <placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>
             </objects>
-            <point key="canvasLocation" x="-2582" y="-400"/>
+            <point key="canvasLocation" x="-2682" y="340"/>
+        </scene>
+        <!--Item-->
+        <scene sceneID="Cfc-AT-AS1">
+            <objects>
+                <viewController id="dv8-ph-Ehg" sceneMemberID="viewController">
+                    <view key="view" contentMode="scaleToFill" id="Jwx-gI-Qod">
+                        <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
+                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                        <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
+                        <viewLayoutGuide key="safeArea" id="Ao1-hk-zrH"/>
+                    </view>
+                    <tabBarItem key="tabBarItem" title="Item" id="iKp-9S-aib"/>
+                </viewController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="M03-a6-GOC" userLabel="First Responder" sceneMemberID="firstResponder"/>
+            </objects>
+            <point key="canvasLocation" x="-1644" y="340"/>
+        </scene>
+        <!--Tab Bar Controller-->
+        <scene sceneID="U6k-MC-AHH">
+            <objects>
+                <tabBarController automaticallyAdjustsScrollViewInsets="NO" id="Va7-1y-Tel" sceneMemberID="viewController">
+                    <toolbarItems/>
+                    <tabBar key="tabBar" contentMode="scaleToFill" insetsLayoutMarginsFromSafeArea="NO" id="HSI-2O-RyO">
+                        <rect key="frame" x="0.0" y="0.0" width="1000" height="1000"/>
+                        <autoresizingMask key="autoresizingMask"/>
+                        <color key="backgroundColor" white="0.0" alpha="0.0" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
+                    </tabBar>
+                    <connections>
+                        <segue destination="BYZ-38-t0r" kind="relationship" relationship="viewControllers" id="dL3-9L-KNU"/>
+                        <segue destination="dv8-ph-Ehg" kind="relationship" relationship="viewControllers" id="8QB-uV-gaF"/>
+                    </connections>
+                </tabBarController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="huq-Fh-0sW" userLabel="First Responder" sceneMemberID="firstResponder"/>
+            </objects>
+            <point key="canvasLocation" x="-2172" y="-555"/>
         </scene>
     </scenes>
     <resources>

Example/TableView/ViewController.swift

@@ -45,15 +45,11 @@ class ViewController: UIViewController {
     override func viewDidLoad() {
         super.viewDidLoad()
         tableview.isSkeletonable = true
-    }
-
-    override func viewDidLayoutSubviews() {
-        view.layoutSkeletonIfNeeded()
+        view.showAnimatedSkeleton()
     }
     
     override func viewDidAppear(_ animated: Bool) {
         super.viewDidAppear(animated)
-        view.showAnimatedSkeleton()
     }
 
     @IBAction func changeAnimated(_ sender: Any) {

README.md

@@ -22,6 +22,9 @@
         <img src="https://img.shields.io/badge/contact-@JuanpeCatalan-blue.svg?style=flat" alt="Twitter: @JuanpeCatalan" />
     </a>
     <br/>
+    <a href="https://gitter.im/SkeletonView/community?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge">
+        <img src="https://badges.gitter.im/SkeletonView/community.svg?style=flat" />
+    </a>
     <a href="https://twitter.com/intent/tweet?text=Wow%20This%20library%20is%20awesome:&url=https%3A%2F%2Fgithub.com%2FJuanpe%2FSkeletonView">
       <img src="https://img.shields.io/twitter/url/https/github.com/Juanpe/SkeletonView.svg?style=social" alt="License" />
     </a>
@@ -174,7 +177,7 @@ avatarImageView.isSkeletonable = true
 
 #### Skeleton views layout
 
-Sometimes skeleton layout may not fit your layout because the parent view bounds have changed. For example, rotating the device.
+Sometimes skeleton layout may not fit your layout because the parent view bounds have changed. ~For example, rotating the device.~
 
 You can relayout the skeleton views like so:
 
@@ -184,6 +187,8 @@ override func viewDidLayoutSubviews() {
 }
 ```
 
+⚠️⚠️ You shouldn't call this method. From *version 1.8.1* you don't need to call this method, the library does automatically. So, you can use this method *ONLY* in the cases when you need to update the layout of the skeleton manually.
+
 #### Update skeleton configuration
 
 You can change the skeleton configuration at any time like its colour, animation, etc. with the following methods:
@@ -433,14 +438,21 @@ Since ```SkeletonView``` is recursive, and we want skeleton to be very efficient
 
 Because an image is worth a thousand words:
 
+In this example we have a `UIViewController` with a `ContainerView` and a `UITableView`. When the view is ready, we show the skeleton using this method:
+```
+view.showSkeleton()
+```
+
 > ```ìsSkeletonable```= ☠️
 
-| Configuration | Result
-|------- | -------
-|![](Assets/no_skeletonable.png) | ![](Assets/no_skeletonables_result.png)
-|![](Assets/container_no_skeletonable.png) | ![](Assets/no_skeletonables_result.png)
-|![](Assets/container_skeletonable.png) | ![](Assets/container_skeletonable_result.png)
-|![](Assets/all_skeletonables.png) | ![](Assets/all_skeletonables_result.png)
+| Configuration | Result|
+|:-------:|:-------:|
+|<img src="Assets/no_skeletonable.jpg" width="350"/> | <img src="Assets/no_skeletonables_result.png" width="350"/>|
+|<img src="Assets/container_no_skeletonable.jpg" width="350"/> | <img src="Assets/no_skeletonables_result.png" width="350"/>|
+|<img src="Assets/container_skeletonable.jpg" width="350"/> | <img src="Assets/container_skeletonable_result.png" width="350"/>|
+|<img src="Assets/all_skeletonables.jpg" width="350"/>| <img src="Assets/all_skeletonables_result.png" width="350"/>|
+|<img src="Assets/tableview_no_skeletonable.jpg" width="350"/> | <img src="Assets/tableview_no_skeletonable_result.png" height="350"/>|
+|<img src="Assets/tableview_skeletonable.jpg" width="350"/> | <img src="Assets/tableview_skeletonable_result.png" height="350"/>|
 
 
 ### 🔬 Debug
@@ -516,6 +528,7 @@ See [all contributors](https://github.com/Juanpe/SkeletonView/graphs/contributor
 - [CocoaControls](https://www.cocoacontrols.com/controls/skeletonview)
 - [Awesome iOS Newsletter #74](https://ios.libhunt.com/newsletter/74)
 - [Swift News #36](https://www.youtube.com/watch?v=mAGpsQiy6so)
+- [Best iOS articles, new tools & more](https://medium.com/flawless-app-stories/best-ios-articles-new-tools-more-fcbe673e10d)
 
 
 

SkeletonView.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name         = "SkeletonView"
-  s.version      = "1.8"
+  s.version      = "1.8.2"
   s.summary      = "An elegant way to show users that something is happening and also prepare them to which contents he is waiting"
   s.description  = <<-DESC
   Today almost all apps have async processes, as API requests, long runing processes, etc. And while the processes are working, usually developers place a loading view to show users that something is going on.

SkeletonView.xcodeproj/project.pbxproj

@@ -78,6 +78,8 @@
 		F54CF5E52024CEB000330B0D /* UITableView+CollectionSkeleton.swift in Sources */ = {isa = PBXBuildFile; fileRef = F54CF5E22024CEAF00330B0D /* UITableView+CollectionSkeleton.swift */; };
 		F54CF5E62024CEB000330B0D /* UICollectionView+CollectionSkeleton.swift in Sources */ = {isa = PBXBuildFile; fileRef = F54CF5E32024CEB000330B0D /* UICollectionView+CollectionSkeleton.swift */; };
 		F56B94461FAE20AF0095662F /* PrepareForSkeletonProtocol.swift in Sources */ = {isa = PBXBuildFile; fileRef = F56B94451FAE20AF0095662F /* PrepareForSkeletonProtocol.swift */; };
+		F570ABF42314629700390248 /* Swizzling.swift in Sources */ = {isa = PBXBuildFile; fileRef = F570ABF32314629700390248 /* Swizzling.swift */; };
+		F570ABF52314629700390248 /* Swizzling.swift in Sources */ = {isa = PBXBuildFile; fileRef = F570ABF32314629700390248 /* Swizzling.swift */; };
 		F5804772230ECD0000066D02 /* UIView+IBInspectable.swift in Sources */ = {isa = PBXBuildFile; fileRef = F5804771230ECD0000066D02 /* UIView+IBInspectable.swift */; };
 		F5804773230ECD0000066D02 /* UIView+IBInspectable.swift in Sources */ = {isa = PBXBuildFile; fileRef = F5804771230ECD0000066D02 /* UIView+IBInspectable.swift */; };
 		F587FB84202CBFC8002DB5FE /* SkeletonFlow.swift in Sources */ = {isa = PBXBuildFile; fileRef = F587FB83202CBFC8002DB5FE /* SkeletonFlow.swift */; };
@@ -185,6 +187,7 @@
 		F54CF5E22024CEAF00330B0D /* UITableView+CollectionSkeleton.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = "UITableView+CollectionSkeleton.swift"; sourceTree = "<group>"; };
 		F54CF5E32024CEB000330B0D /* UICollectionView+CollectionSkeleton.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = "UICollectionView+CollectionSkeleton.swift"; sourceTree = "<group>"; };
 		F56B94451FAE20AF0095662F /* PrepareForSkeletonProtocol.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = PrepareForSkeletonProtocol.swift; sourceTree = "<group>"; };
+		F570ABF32314629700390248 /* Swizzling.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Swizzling.swift; sourceTree = "<group>"; };
 		F5804771230ECD0000066D02 /* UIView+IBInspectable.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = "UIView+IBInspectable.swift"; sourceTree = "<group>"; };
 		F587FB83202CBFC8002DB5FE /* SkeletonFlow.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SkeletonFlow.swift; sourceTree = "<group>"; };
 		F587FB85202CEC95002DB5FE /* UIView+UIApplicationDelegate.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "UIView+UIApplicationDelegate.swift"; sourceTree = "<group>"; };
@@ -437,6 +440,7 @@
 				F5F899D11FAB9630002E8FDA /* AssociationPolicy.swift */,
 				F56B94451FAE20AF0095662F /* PrepareForSkeletonProtocol.swift */,
 				F5307E311FB0F42F00EE67C5 /* RecursiveProtocol.swift */,
+				F570ABF32314629700390248 /* Swizzling.swift */,
 			);
 			path = Helpers;
 			sourceTree = "<group>";
@@ -684,6 +688,7 @@
 				17DD0E0C207FB28900C56334 /* UICollectionView+CollectionSkeleton.swift in Sources */,
 				F5804773230ECD0000066D02 /* UIView+IBInspectable.swift in Sources */,
 				17DD0E13207FB28C00C56334 /* UIView+UIApplicationDelegate.swift in Sources */,
+				F570ABF52314629700390248 /* Swizzling.swift in Sources */,
 				F5D3FB0C209DCAA300003FCF /* SubviewsSkeletonables.swift in Sources */,
 				17DD0E14207FB28F00C56334 /* SkeletonAnimationBuilder.swift in Sources */,
 				17DD0E11207FB28C00C56334 /* UIView+Frame.swift in Sources */,
@@ -740,6 +745,7 @@
 				F5F622411FAC6E31007C062A /* UIColor+Skeleton.swift in Sources */,
 				F5804772230ECD0000066D02 /* UIView+IBInspectable.swift in Sources */,
 				F587FB84202CBFC8002DB5FE /* SkeletonFlow.swift in Sources */,
+				F570ABF42314629700390248 /* Swizzling.swift in Sources */,
 				F5D3FB0B209DCAA300003FCF /* SubviewsSkeletonables.swift in Sources */,
 				F5F899D21FAB9630002E8FDA /* AssociationPolicy.swift in Sources */,
 				F54CF5E62024CEB000330B0D /* UICollectionView+CollectionSkeleton.swift in Sources */,
@@ -1038,7 +1044,7 @@
 		52D6D9911BEFF229002C0205 /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
-				APPLICATION_EXTENSION_API_ONLY = YES;
+				APPLICATION_EXTENSION_API_ONLY = NO;
 				CLANG_ENABLE_MODULES = YES;
 				CODE_SIGN_IDENTITY = "iPhone Developer";
 				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "";
@@ -1063,7 +1069,7 @@
 		52D6D9921BEFF229002C0205 /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
-				APPLICATION_EXTENSION_API_ONLY = YES;
+				APPLICATION_EXTENSION_API_ONLY = NO;
 				CLANG_ENABLE_MODULES = YES;
 				CODE_SIGN_IDENTITY = "iPhone Developer";
 				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "";

Sources/Collections/CollectionSkeletonProtocol.swift

@@ -29,6 +29,6 @@ extension CollectionSkeleton where Self: UIScrollView {
     var estimatedNumberOfRows: Int { return 0 }
     func addDummyDataSource() {}
     func removeDummyDataSource(reloadAfter: Bool) {}
-    func disableUserInteraction() { isScrollEnabled = false }
-    func enableUserInteraction() { isScrollEnabled = true }
+    func disableUserInteraction() { isUserInteractionEnabled = false; isScrollEnabled = false }
+    func enableUserInteraction() { isUserInteractionEnabled = true; isScrollEnabled = true }
 }

Sources/Collections/UIView+CollectionSkeleton.swift

@@ -11,6 +11,7 @@ import UIKit
 extension UIView {
     func addDummyDataSourceIfNeeded() {
         guard let collection = self as? CollectionSkeleton else { return }
+        status = .on
         collection.addDummyDataSource()
         collection.disableUserInteraction()
     }
@@ -22,6 +23,7 @@ extension UIView {
     
     func removeDummyDataSourceIfNeeded(reloadAfter reload: Bool = true) {
         guard let collection = self as? CollectionSkeleton else { return }
+        status = .off
         collection.removeDummyDataSource(reloadAfter: reload)
         collection.enableUserInteraction()
     }

Sources/Extensions/CALayer+Extensions.swift

@@ -45,11 +45,7 @@ extension CALayer {
             .setCornerRadius(multilineCornerRadius)
 
         (0..<numberOfSublayers).forEach { index in
-            var width = getLineWidth(index: index, numberOfSublayers: numberOfSublayers, lastLineFillPercent: lastLineFillPercent)
-            if index == numberOfSublayers - 1 && numberOfSublayers != 1 {
-                width = width * CGFloat(lastLineFillPercent) / 100;
-            }
-
+			let width = calculatedWidthForLine(at: index, totalLines: numberOfSublayers, lastLineFillPercent: lastLineFillPercent)
             if let layer = layerBuilder
                 .setIndex(index)
                 .setWidth(width)
@@ -63,17 +59,16 @@ extension CALayer {
         let currentSkeletonSublayers = skeletonSublayers
         let numberOfSublayers = currentSkeletonSublayers.count
         for (index, layer) in currentSkeletonSublayers.enumerated() {
-            let width = getLineWidth(index: index, numberOfSublayers: numberOfSublayers, lastLineFillPercent: lastLineFillPercent)
+			let width = calculatedWidthForLine(at: index, totalLines: numberOfSublayers, lastLineFillPercent: lastLineFillPercent)
             layer.updateLayerFrame(for: index, width: width)
         }
     }
 
-    private func getLineWidth(index: Int, numberOfSublayers: Int, lastLineFillPercent: Int) -> CGFloat {
+	private func calculatedWidthForLine(at index: Int, totalLines: Int, lastLineFillPercent: Int) -> CGFloat {
         var width = bounds.width
-        if index == numberOfSublayers - 1 && numberOfSublayers != 1 {
-            width = width * CGFloat(lastLineFillPercent) / 100;
+        if index == totalLines - 1 && totalLines != 1 {
+            width = width * CGFloat(lastLineFillPercent) / 100
         }
-
         return width
     }
 
@@ -83,8 +78,8 @@ extension CALayer {
     }
 
     private func calculateNumLines(maxLines: Int) -> Int {
-        let spaceRequitedForEachLine = SkeletonAppearance.default.multilineHeight + SkeletonAppearance.default.multilineSpacing
-        var numberOfSublayers = Int(round(CGFloat(bounds.height)/CGFloat(spaceRequitedForEachLine)))
+        let requiredSpaceForEachLine = SkeletonAppearance.default.multilineHeight + SkeletonAppearance.default.multilineSpacing
+        var numberOfSublayers = Int(round(CGFloat(bounds.height)/CGFloat(requiredSpaceForEachLine)))
         if maxLines != 0,  maxLines <= numberOfSublayers { numberOfSublayers = maxLines }
         return numberOfSublayers
     }
@@ -100,6 +95,7 @@ public extension CALayer {
         pulseAnimation.timingFunction = CAMediaTimingFunction(name: CAMediaTimingFunctionName.easeInEaseOut)
         pulseAnimation.autoreverses = true
         pulseAnimation.repeatCount = .infinity
+        pulseAnimation.isRemovedOnCompletion = false
         return pulseAnimation
     }
     
@@ -117,15 +113,19 @@ public extension CALayer {
         animGroup.duration = 1.5
         animGroup.timingFunction = CAMediaTimingFunction(name: CAMediaTimingFunctionName.easeIn)
         animGroup.repeatCount = .infinity
+        animGroup.isRemovedOnCompletion = false
         
         return animGroup
     }
     
-    func playAnimation(_ anim: SkeletonLayerAnimation, key: String) {
+    func playAnimation(_ anim: SkeletonLayerAnimation, key: String, completion: (() -> Void)? = nil) {
         skeletonSublayers.recursiveSearch(leafBlock: {
+            DispatchQueue.main.async { CATransaction.begin() }
+            DispatchQueue.main.async { CATransaction.setCompletionBlock(completion) }
             add(anim(self), forKey: key)
+            DispatchQueue.main.async { CATransaction.commit() }
         }) {
-            $0.playAnimation(anim, key: key)
+            $0.playAnimation(anim, key: key, completion: completion)
         }
     }
     
@@ -140,15 +140,14 @@ public extension CALayer {
 
 extension CALayer {
 	func setOpacity(from: Int, to: Int, duration: TimeInterval, completion: (() -> Void)?) {
-		CATransaction.begin()
+        DispatchQueue.main.async { CATransaction.begin() }
 		let animation = CABasicAnimation(keyPath: #keyPath(CALayer.opacity))
 		animation.fromValue = from
 		animation.toValue = to
 		animation.duration = duration
 		animation.timingFunction = CAMediaTimingFunction(name: CAMediaTimingFunctionName.easeInEaseOut)
-//		layer.contentLayer.opacity = 1
-		CATransaction.setCompletionBlock(completion)
+        DispatchQueue.main.async { CATransaction.setCompletionBlock(completion) }
 		add(animation, forKey: "setOpacityAnimation")
-		CATransaction.commit()
+        DispatchQueue.main.async { CATransaction.commit() }
 	}
 }

Sources/Extensions/UIView+Extension.swift

@@ -42,7 +42,7 @@ extension UIView {
         set { ao_set(newValue ?? .off, pkey: &ViewAssociatedKeys.status) }
     }
 
-    var skeletonIsAnimated: Bool! {
+    var isSkeletonAnimated: Bool! {
         get { return ao_get(pkey: &ViewAssociatedKeys.isSkeletonAnimated) as? Bool ?? false }
         set { ao_set(newValue ?? false, pkey: &ViewAssociatedKeys.isSkeletonAnimated) }
     }

Sources/Extensions/UIView+IBInspectable.swift

@@ -13,7 +13,7 @@ public extension UIView {
         return status == .on || (subviewsSkeletonables.first(where: { $0.isSkeletonActive }) != nil)
     }
 
-    fileprivate var skeletonable: Bool! {
+    private var skeletonable: Bool! {
         get { return ao_get(pkey: &ViewAssociatedKeys.skeletonable) as? Bool ?? false }
         set { ao_set(newValue ?? false, pkey: &ViewAssociatedKeys.skeletonable) }
     }

Sources/Extensions/UIView+UIApplicationDelegate.swift

@@ -12,12 +12,14 @@ extension UIView {
     enum Constants {
         static let becomeActiveNotification = UIApplication.didBecomeActiveNotification
         static let enterForegroundNotification = UIApplication.didEnterBackgroundNotification
+        static let willTerminateNotification = UIApplication.willTerminateNotification
         static let needAnimatedSkeletonKey = "needAnimateSkeleton"
     }
     
     func addAppNotificationsObservers() {
         NotificationCenter.default.addObserver(self, selector: #selector(appDidBecomeActive), name: Constants.becomeActiveNotification, object: nil)
         NotificationCenter.default.addObserver(self, selector: #selector(appDidEnterBackground), name: Constants.enterForegroundNotification, object: nil)
+        NotificationCenter.default.addObserver(self, selector: #selector(willTerminateNotification), name: Constants.enterForegroundNotification, object: nil)
     }
     
     func removeAppNoticationsObserver() {
@@ -32,6 +34,10 @@ extension UIView {
     }
     
     @objc func appDidEnterBackground() {
-        UserDefaults.standard.set((isSkeletonActive && skeletonIsAnimated), forKey: Constants.needAnimatedSkeletonKey)
+        UserDefaults.standard.set((isSkeletonActive && isSkeletonAnimated), forKey: Constants.needAnimatedSkeletonKey)
+    }
+    
+    @objc func willTerminateNotification() {
+        UserDefaults.standard.set(false, forKey: Constants.needAnimatedSkeletonKey)
     }
 }

Sources/Helpers/Swizzling.swift

@@ -0,0 +1,27 @@
+// Copyright © 2019 SkeletonView. All rights reserved.
+
+import Foundation
+
+extension DispatchQueue {
+    private static var _onceTracker = [String]()
+    
+    class func once(token: String, block:()->Void) {
+        objc_sync_enter(self); defer { objc_sync_exit(self) }
+        guard !_onceTracker.contains(token) else { return }
+        
+        _onceTracker.append(token)
+        block()
+    }
+}
+
+func swizzle(selector originalSelector: Selector, with swizzledSelector: Selector, inClass: AnyClass, usingClass: AnyClass) {
+    guard let originalMethod = class_getInstanceMethod(inClass, originalSelector),
+        let swizzledMethod = class_getInstanceMethod(usingClass, swizzledSelector)
+        else { return }
+    
+    if (class_addMethod(inClass, swizzledSelector, method_getImplementation(originalMethod), method_getTypeEncoding(originalMethod))) {
+        class_replaceMethod(inClass, originalSelector, method_getImplementation(swizzledMethod), method_getTypeEncoding(swizzledMethod))
+    } else {
+        method_exchangeImplementations(originalMethod, swizzledMethod)
+    }
+}

Sources/SkeletonAnimationBuilder.swift

@@ -78,6 +78,7 @@ public class SkeletonAnimationBuilder {
             animGroup.duration = duration
             animGroup.timingFunction = CAMediaTimingFunction(name: CAMediaTimingFunctionName.easeIn)
             animGroup.repeatCount = .infinity
+            animGroup.isRemovedOnCompletion = false
             
             return animGroup
         }

Sources/SkeletonFlow.swift

@@ -3,43 +3,42 @@
 import UIKit
 
 protocol SkeletonFlowDelegate {
-    func willBeginShowingSkeletons(withRootView rootView: UIView)
-    func didShowSkeletons(withRootView rootView: UIView)
-    func willBeginUpdatingSkeletons(withRootView rootView: UIView)
-    func didUpdateSkeletons(withRootView rootView: UIView)
-    func willBeginLayingSkeletonsIfNeeded(withRootView: UIView)
-    func didLayoutSkeletonsIfNeeded(withRootView: UIView)
-    func willBeginHidingSkeletons(withRootView rootView: UIView)
-    func didHideSkeletons(withRootView rootView: UIView)
+    func willBeginShowingSkeletons(rootView: UIView)
+    func didShowSkeletons(rootView: UIView)
+    func willBeginUpdatingSkeletons(rootView: UIView)
+    func didUpdateSkeletons(rootView: UIView)
+    func willBeginLayingSkeletonsIfNeeded(rootView: UIView)
+    func didLayoutSkeletonsIfNeeded(rootView: UIView)
+    func willBeginHidingSkeletons(rootView: UIView)
+    func didHideSkeletons(rootView: UIView)
 }
 
 class SkeletonFlowHandler: SkeletonFlowDelegate {
-
-    func willBeginShowingSkeletons(withRootView rootView: UIView) {
+    func willBeginShowingSkeletons(rootView: UIView) {
         rootView.addAppNotificationsObservers()
     }
 
-    func didShowSkeletons(withRootView rootView: UIView) {
+    func didShowSkeletons(rootView: UIView) {
         printSkeletonHierarchy(in: rootView)
     }
     
-    func willBeginUpdatingSkeletons(withRootView rootView: UIView) {
+    func willBeginUpdatingSkeletons(rootView: UIView) {
     }
 
-    func didUpdateSkeletons(withRootView rootView: UIView) {
+    func didUpdateSkeletons(rootView: UIView) {
     }
 
-    func willBeginLayingSkeletonsIfNeeded(withRootView: UIView) {
+    func willBeginLayingSkeletonsIfNeeded(rootView: UIView) {
     }
 
-    func didLayoutSkeletonsIfNeeded(withRootView: UIView) {
+    func didLayoutSkeletonsIfNeeded(rootView: UIView) {
     }
 
-    func willBeginHidingSkeletons(withRootView rootView: UIView) {
+    func willBeginHidingSkeletons(rootView: UIView) {
         rootView.removeAppNoticationsObserver()
     }
 
-    func didHideSkeletons(withRootView rootView: UIView) {
+    func didHideSkeletons(rootView: UIView) {
         rootView.flowDelegate = nil
     }
 }

Sources/SkeletonLayer.swift

@@ -70,6 +70,7 @@ struct SkeletonLayer {
         switch transition {
         case .none:
             maskLayer.removeFromSuperlayer()
+            completion?()
         case .crossDissolve(let duration):
 			maskLayer.setOpacity(from: 1, to: 0, duration: duration) {
 				self.maskLayer.removeFromSuperlayer()
@@ -77,22 +78,30 @@ struct SkeletonLayer {
 			}
         }
     }
-    
+
+    /// Returns a multiLineViewHolder only if the current holder implements the `ContainsMultilineText` protocol,
+    /// and actually displays multiple lines of text.
+    private var multiLineViewHolder: ContainsMultilineText? {
+        guard let multiLineView = holder as? ContainsMultilineText,
+            multiLineView.numLines != 1 else { return nil }
+        return multiLineView
+    }
+
     func addMultilinesIfNeeded() {
-        guard let multiLineView = holder as? ContainsMultilineText else { return }
+        guard let multiLineView = multiLineViewHolder else { return }
         maskLayer.addMultilinesLayers(lines: multiLineView.numLines, type: type, lastLineFillPercent: multiLineView.lastLineFillingPercent, multilineCornerRadius: multiLineView.multilineCornerRadius)
     }
 
     func updateMultilinesIfNeeded() {
-        guard let multiLineView = holder as? ContainsMultilineText else { return }
+        guard let multiLineView = multiLineViewHolder else { return }
         maskLayer.updateMultilinesLayers(lastLineFillPercent: multiLineView.lastLineFillingPercent)
     }
 }
 
 extension SkeletonLayer {
-    func start(_ anim: SkeletonLayerAnimation? = nil) {
+    func start(_ anim: SkeletonLayerAnimation? = nil, completion: (() -> Void)? = nil) {
         let animation = anim ?? type.layerAnimation
-        contentLayer.playAnimation(animation, key: "skeletonAnimation")
+        contentLayer.playAnimation(animation, key: "skeletonAnimation", completion: completion)
     }
     
     func stopAnimation() {

Sources/SkeletonView.swift

@@ -3,21 +3,47 @@
 import UIKit
 
 public extension UIView {
+    /// Shows the skeleton without animation using the view that calls this method as root view.
+    ///
+    /// - Parameters:
+    ///   - color: The color of the skeleton. Defaults to `SkeletonAppearance.default.tintColor`.
+    ///   - transition: The style of the transition when the skeleton appears. Defaults to `.none`.
     func showSkeleton(usingColor color: UIColor = SkeletonAppearance.default.tintColor, transition: SkeletonTransitionStyle = .none) {
         let config = SkeletonConfig(type: .solid, colors: [color], transition: transition)
         showSkeleton(skeletonConfig: config)
     }
     
+    /// Shows the gradient skeleton without animation using the view that calls this method as root view.
+    ///
+    /// - Parameters:
+    ///   - gradient: The gradient of the skeleton. Defaults to `SkeletonAppearance.default.gradient`.
+    ///   - transition: The style of the transition when the skeleton appears. Defaults to `.none`.
     func showGradientSkeleton(usingGradient gradient: SkeletonGradient = SkeletonAppearance.default.gradient, transition: SkeletonTransitionStyle = .none) {
         let config = SkeletonConfig(type: .gradient, colors: gradient.colors, transition: transition)
         showSkeleton(skeletonConfig: config)
     }
     
+    /// Shows the animated skeleton using the view that calls this method as root view.
+    ///
+    /// If animation is nil, sliding animation will be used, with direction left to right.
+    ///
+    /// - Parameters:
+    ///   - color: The color of skeleton. Defaults to `SkeletonAppearance.default.tintColor`.
+    ///   - animation: The animation of the skeleton. Defaults to `nil`.
+    ///   - transition: The style of the transition when the skeleton appears. Defaults to `.none`.
     func showAnimatedSkeleton(usingColor color: UIColor = SkeletonAppearance.default.tintColor, animation: SkeletonLayerAnimation? = nil, transition: SkeletonTransitionStyle = .none) {
         let config = SkeletonConfig(type: .solid, colors: [color], animated: true, animation: animation, transition: transition)
         showSkeleton(skeletonConfig: config)
     }
     
+    /// Shows the gradient skeleton without animation using the view that calls this method as root view.
+    ///
+    /// If animation is nil, sliding animation will be used, with direction left to right.
+    ///
+    /// - Parameters:
+    ///   - gradient: The gradient of the skeleton. Defaults to `SkeletonAppearance.default.gradient`.
+    ///   - animation: The animation of the skeleton. Defaults to `nil`.
+    ///   - transition: The style of the transition when the skeleton appears. Defaults to `.none`.
     func showAnimatedGradientSkeleton(usingGradient gradient: SkeletonGradient = SkeletonAppearance.default.gradient, animation: SkeletonLayerAnimation? = nil, transition: SkeletonTransitionStyle = .none) {
         let config = SkeletonConfig(type: .gradient, colors: gradient.colors, animated: true, animation: animation, transition: transition)
         showSkeleton(skeletonConfig: config)
@@ -44,29 +70,22 @@ public extension UIView {
     }
 
     func layoutSkeletonIfNeeded() {
-        guard let flowDelegate = flowDelegate else { return }
-        flowDelegate.willBeginLayingSkeletonsIfNeeded(withRootView: self)
+        flowDelegate?.willBeginLayingSkeletonsIfNeeded(rootView: self)
         recursiveLayoutSkeletonIfNeeded(root: self)
     }
     
     func hideSkeleton(reloadDataAfter reload: Bool = true, transition: SkeletonTransitionStyle = .none) {
-        if var config = currentSkeletonConfig {
-            config.transition = transition
-            updateSkeleton(skeletonConfig: config)
-        }
-        flowDelegate?.willBeginHidingSkeletons(withRootView: self)
-        recursiveHideSkeleton(reloadDataAfter: reload, root: self)
+        flowDelegate?.willBeginHidingSkeletons(rootView: self)
+        recursiveHideSkeleton(reloadDataAfter: reload, transition: transition, root: self)
     }
     
     func startSkeletonAnimation(_ anim: SkeletonLayerAnimation? = nil) {
-        skeletonIsAnimated = true
         subviewsSkeletonables.recursiveSearch(leafBlock: startSkeletonLayerAnimationBlock(anim)) { subview in
             subview.startSkeletonAnimation(anim)
         }
     }
 
     func stopSkeletonAnimation() {
-        skeletonIsAnimated = false
         subviewsSkeletonables.recursiveSearch(leafBlock: stopSkeletonLayerAnimationBlock) { subview in
             subview.stopSkeletonAnimation()
         }
@@ -74,19 +93,22 @@ public extension UIView {
 }
 
 extension UIView {
+    @objc func skeletonLayoutSubviews() {
+        guard isSkeletonActive else { return }
+        layoutSkeletonIfNeeded()
+    }
     
     func showSkeleton(skeletonConfig config: SkeletonConfig) {
-        skeletonIsAnimated = config.animated
+        isSkeletonAnimated = config.animated
         flowDelegate = SkeletonFlowHandler()
-        flowDelegate?.willBeginShowingSkeletons(withRootView: self)
+        flowDelegate?.willBeginShowingSkeletons(rootView: self)
         recursiveShowSkeleton(skeletonConfig: config, root: self)
     }
 
-    fileprivate func recursiveShowSkeleton(skeletonConfig config: SkeletonConfig, root: UIView? = nil) {
-        layoutIfNeeded()
-
+    private func recursiveShowSkeleton(skeletonConfig config: SkeletonConfig, root: UIView? = nil) {
+        guard !isSkeletonActive else { return }
         currentSkeletonConfig = config
-
+        swizzleLayoutSubviews()
         addDummyDataSourceIfNeeded()
         subviewsSkeletonables.recursiveSearch(leafBlock: {
             showSkeletonIfNotActive(skeletonConfig: config)
@@ -95,11 +117,11 @@ extension UIView {
         }
 
         if let root = root {
-            flowDelegate?.didShowSkeletons(withRootView: root)
+            flowDelegate?.didShowSkeletons(rootView: root)
         }
     }
 
-    fileprivate func showSkeletonIfNotActive(skeletonConfig config: SkeletonConfig) {
+    private func showSkeletonIfNotActive(skeletonConfig config: SkeletonConfig) {
         guard !isSkeletonActive else { return }
         isUserInteractionEnabled = false
         saveViewState()
@@ -108,81 +130,93 @@ extension UIView {
     }
 
     func updateSkeleton(skeletonConfig config: SkeletonConfig) {
-        guard let flowDelegate = flowDelegate else { return }
-        skeletonIsAnimated = config.animated
-        flowDelegate.willBeginUpdatingSkeletons(withRootView: self)
+        isSkeletonAnimated = config.animated
+        flowDelegate?.willBeginUpdatingSkeletons(rootView: self)
         recursiveUpdateSkeleton(skeletonConfig: config, root: self)
     }
 
-    fileprivate func recursiveUpdateSkeleton(skeletonConfig config: SkeletonConfig, root: UIView? = nil) {
-        layoutIfNeeded()
-
+    private func recursiveUpdateSkeleton(skeletonConfig config: SkeletonConfig, root: UIView? = nil) {
+        guard isSkeletonActive else { return }
         currentSkeletonConfig = config
-
         updateDummyDataSourceIfNeeded()
         subviewsSkeletonables.recursiveSearch(leafBlock: {
-            guard isSkeletonActive else { return }
-
             if skeletonLayer?.type != config.type {
-                hideSkeleton()
-            }
-
-            if isSkeletonActive {
-                updateSkeletonLayer(skeletonConfig: config)
+                removeSkeletonLayer()
+                addSkeletonLayer(skeletonConfig: config)
             } else {
-                showSkeletonIfNotActive(skeletonConfig: config)
+                updateSkeletonLayer(skeletonConfig: config)
             }
         }) { subview in
             subview.recursiveUpdateSkeleton(skeletonConfig: config)
         }
 
         if let root = root {
-            flowDelegate?.didUpdateSkeletons(withRootView: root)
+            flowDelegate?.didUpdateSkeletons(rootView: root)
         }
     }
 
-    fileprivate func recursiveLayoutSkeletonIfNeeded(root: UIView? = nil) {
-        layoutIfNeeded()
-
+    private func recursiveLayoutSkeletonIfNeeded(root: UIView? = nil) {
         subviewsSkeletonables.recursiveSearch(leafBlock: {
+            guard isSkeletonable, isSkeletonActive else { return }
             layoutSkeletonLayerIfNeeded()
+            if let config = currentSkeletonConfig, config.animated, !isSkeletonAnimated {
+                startSkeletonAnimation(config.animation)
+            }
         }) { subview in
             subview.recursiveLayoutSkeletonIfNeeded()
         }
 
         if let root = root {
-            flowDelegate?.didLayoutSkeletonsIfNeeded(withRootView: root)
+            flowDelegate?.didLayoutSkeletonsIfNeeded(rootView: root)
         }
     }
 
-    fileprivate func recursiveHideSkeleton(reloadDataAfter reload: Bool, root: UIView? = nil) {
+    private func recursiveHideSkeleton(reloadDataAfter reload: Bool, transition: SkeletonTransitionStyle, root: UIView? = nil) {
+        guard isSkeletonActive else { return }
         removeDummyDataSourceIfNeeded(reloadAfter: reload)
+        currentSkeletonConfig?.transition = transition
         isUserInteractionEnabled = true
         subviewsSkeletonables.recursiveSearch(leafBlock: {
             recoverViewState(forced: false)
             removeSkeletonLayer()
         }) { subview in
-            subview.recursiveHideSkeleton(reloadDataAfter: reload)
+            subview.recursiveHideSkeleton(reloadDataAfter: reload, transition: transition)
         }
 
         if let root = root {
-            flowDelegate?.didHideSkeletons(withRootView: root)
+            flowDelegate?.didHideSkeletons(rootView: root)
         }
     }
     
-    fileprivate func startSkeletonLayerAnimationBlock(_ anim: SkeletonLayerAnimation? = nil) -> VoidBlock {
+    private func startSkeletonLayerAnimationBlock(_ anim: SkeletonLayerAnimation? = nil) -> VoidBlock {
         return {
+            self.isSkeletonAnimated = true
             guard let layer = self.skeletonLayer else { return }
-            layer.start(anim)
+            layer.start(anim) { [weak self] in
+                self?.isSkeletonAnimated = false
+            }
         }
     }
     
-    fileprivate var stopSkeletonLayerAnimationBlock: VoidBlock {
+    private var stopSkeletonLayerAnimationBlock: VoidBlock {
         return {
+            self.isSkeletonAnimated = false
             guard let layer = self.skeletonLayer else { return }
             layer.stopAnimation()
         }
     }
+    
+    private func swizzleLayoutSubviews() {
+        DispatchQueue.main.asyncAfter(deadline: .now() + 0.01) {
+            DispatchQueue.once(token: "UIView.SkeletonView.swizzle") {
+                swizzle(selector: #selector(UIView.layoutSubviews),
+                        with: #selector(UIView.skeletonLayoutSubviews),
+                        inClass: UIView.self,
+                        usingClass: UIView.self)
+                self.layoutSkeletonIfNeeded()
+            }
+        }
+    }
 }
 
 extension UIView {
@@ -197,9 +231,9 @@ extension UIView {
         self.skeletonLayer = skeletonLayer
         layer.insertSublayer(skeletonLayer,
                              at: UInt32.max,
-                             transition: config.transition) {
+                             transition: config.transition) { [weak self] in
                                 if config.animated {
-                                    skeletonLayer.start(config.animation)
+                                    self?.startSkeletonAnimation(config.animation)
                                 }
         }
         status = .on
@@ -208,8 +242,11 @@ extension UIView {
     func updateSkeletonLayer(skeletonConfig config: SkeletonConfig) {
         guard let skeletonLayer = skeletonLayer else { return }
         skeletonLayer.update(usingColors: config.colors)
-        if config.animated { skeletonLayer.start(config.animation) }
-        else { skeletonLayer.stopAnimation() }
+        if config.animated {
+            startSkeletonAnimation(config.animation)
+        } else {
+            skeletonLayer.stopAnimation()
+        }
     }
 
     func layoutSkeletonLayerIfNeeded() {

Sources/Transitions/UIView+Transitions.swift

@@ -7,6 +7,7 @@ extension CALayer {
         insertSublayer(layer.contentLayer, at: idx)
         switch transition {
         case .none:
+            completion?()
             break
         case .crossDissolve(let duration):
 			layer.contentLayer.setOpacity(from: 0, to: 1, duration: duration, completion: completion)