Update README.md

.gitignore

@@ -1 +1,2 @@
-*.xcodeproj
+
+_Pods.xcodeproj

DTTextField.podspec

@@ -9,7 +9,7 @@
 Pod::Spec.new do |s|
 
 s.name             = 'DTTextField'
-s.version          = '0.1.0'
+s.version          = '0.2.5'
 s.summary          = 'DTTextField is UITextField library.'
 
   s.description      = <<-DESC

DTTextField/Classes/DTTextField.swift

@@ -2,7 +2,7 @@
 //  DTTextField.swift
 //  Pods
 //
-//  Created by Pixometry 2 on 03/04/17.
+//  Created by Dhaval Thanki on 03/04/17.
 //
 //
 
@@ -11,13 +11,6 @@ import UIKit
 
 public extension String {
     
-    func heightWithConstrainedWidth(width: CGFloat, font: UIFont) -> CGFloat {
-        let constraintRect = CGSize(width: width, height: .greatestFiniteMagnitude)
-        let boundingBox = self.boundingRect(with: constraintRect, options: .usesLineFragmentOrigin, attributes: [NSFontAttributeName: font], context: nil)
-        
-        return boundingBox.height
-    }
-    
     var isEmptyStr:Bool{
         return self.trimmingCharacters(in: NSCharacterSet.whitespaces).isEmpty
     }
@@ -25,20 +18,32 @@ public extension String {
 
 public class DTTextField: UITextField {
     
-    fileprivate var lblFloatPlaceholder:UILabel = UILabel()
-    fileprivate var lblError:UILabel            = UILabel()
+    public enum FloatingDisplayStatus{
+        case always
+        case never
+        case defaults
+    }
+    
+    fileprivate var lblFloatPlaceholder:UILabel             = UILabel()
+    fileprivate var lblError:UILabel                        = UILabel()
     
     fileprivate let paddingX:CGFloat                        = 5.0
-    fileprivate let floatingLabelShowAnimationDuration      = 0.3
     
-    public var dtLayer:CALayer                         = CALayer()
-    public var floatPlaceholderColor:UIColor           = UIColor.black
-    public var floatPlaceholderActiveColor:UIColor     = UIColor.black
+    fileprivate let paddingHeight:CGFloat                   = 10.0
+    
+    public var dtLayer:CALayer                              = CALayer()
+    public var floatPlaceholderColor:UIColor                = UIColor.black
+    public var floatPlaceholderActiveColor:UIColor          = UIColor.black
+    public var floatingLabelShowAnimationDuration           = 0.3
+    public var floatingDisplayStatus:FloatingDisplayStatus  = .defaults
     
     public var errorMessage:String = ""{
         didSet{ lblError.text = errorMessage }
     }
     
+    public var animateFloatPlaceholder:Bool = true
+    public var hideErrorWhenEditing:Bool   = true
+    
     public var errorFont = UIFont.systemFont(ofSize: 10.0){
         didSet{ invalidateIntrinsicContentSize() }
     }
@@ -80,6 +85,14 @@ public class DTTextField: UITextField {
         return paddingX
     }
     
+    fileprivate var fontHeight:CGFloat{
+        return ceil(font!.lineHeight)
+    }
+    
+    fileprivate var dtLayerHeight:CGFloat{
+        return showErrorLabel ? floor(bounds.height - lblError.bounds.size.height - paddingYErrorLabel) : bounds.height
+    }
+    
     fileprivate var floatLabelWidth:CGFloat{
         
         var width = bounds.size.width
@@ -95,10 +108,6 @@ public class DTTextField: UITextField {
         return width - (self.x * 2)
     }
     
-    fileprivate var floatLabelHeight:CGFloat{
-        return lblFloatPlaceholder.text!.heightWithConstrainedWidth(width: floatLabelWidth, font: floatPlaceholderFont)
-    }
-    
     fileprivate var placeholderFinal:String{
         if let attributed = attributedPlaceholder { return attributed.string }
         return placeholder ?? " "
@@ -106,10 +115,12 @@ public class DTTextField: UITextField {
     
     fileprivate var isFloatLabelShowing:Bool = false
     
-    public var showError:Bool = false{
+    fileprivate var showErrorLabel:Bool = false{
         didSet{
             
-            guard showError else {
+            guard showErrorLabel != oldValue else { return }
+            
+            guard showErrorLabel else {
                 hideErrorMessage()
                 return
             }
@@ -126,6 +137,10 @@ public class DTTextField: UITextField {
         }
     }
     
+    public override var text: String?{
+        didSet{ self.textFieldTextChanged() }
+    }
+    
     override public var placeholder: String?{
         didSet{
             
@@ -152,7 +167,14 @@ public class DTTextField: UITextField {
         commonInit()
     }
     
+    public func showError(message:String? = nil) {
+        if let msg = message { errorMessage = msg }
+        showErrorLabel = true
+    }
     
+    public func hideError()  {
+        showErrorLabel = false
+    }
     
     fileprivate func commonInit() {
         
@@ -184,10 +206,12 @@ public class DTTextField: UITextField {
     }
     
     fileprivate func showErrorMessage(){
-        let errorHeight = errorMessage.heightWithConstrainedWidth(width: bounds.width, font: errorFont)
+        
         lblError.text = errorMessage
         lblError.isHidden = false
-        lblError.frame = CGRect(x: paddingX, y: 0, width: bounds.width - (paddingX * 2), height: errorHeight)
+        let boundWithPadding = CGSize(width: bounds.width - (x * 2), height: bounds.height)
+        let errorLabelSize =  lblError.sizeThatFits(boundWithPadding)
+        lblError.frame = CGRect(x: paddingX, y: 0, width: errorLabelSize.width, height: errorLabelSize.height)
         invalidateIntrinsicContentSize()
     }
     
@@ -198,69 +222,89 @@ public class DTTextField: UITextField {
         invalidateIntrinsicContentSize()
     }
     
-    fileprivate func showFloatingLabel() {
+    fileprivate func showFloatingLabel(_ animated:Bool) {
         
         let animations:(()->()) = {
             self.lblFloatPlaceholder.alpha = 1.0
-            self.lblFloatPlaceholder.frame = CGRect(x: self.x, y: self.paddingYFloatLabel, width: self.floatLabelWidth, height: self.floatLabelHeight)
+            self.lblFloatPlaceholder.frame = CGRect(x: self.lblFloatPlaceholder.frame.origin.x,
+                                                    y: self.paddingYFloatLabel,
+                                                    width: self.lblFloatPlaceholder.bounds.size.width,
+                                                    height: self.lblFloatPlaceholder.bounds.size.height)
         }
         
-        UIView.animate(withDuration: floatingLabelShowAnimationDuration,
-                       delay: 0.0,
-                       options: [.beginFromCurrentState,.curveEaseOut],
-                       animations: animations){ status in
-                        DispatchQueue.main.async {
-                            self.layoutIfNeeded()
-                        }
+        if animated && animateFloatPlaceholder {
+            UIView.animate(withDuration: floatingLabelShowAnimationDuration,
+                           delay: 0.0,
+                           options: [.beginFromCurrentState,.curveEaseOut],
+                           animations: animations){ status in
+                            DispatchQueue.main.async {
+                                self.layoutIfNeeded()
+                            }
+            }
+        }else{
+            animations()
         }
     }
     
-    fileprivate func hideFlotingLabel() {
+    fileprivate func hideFlotingLabel(_ animated:Bool) {
         
         let animations:(()->()) = {
             self.lblFloatPlaceholder.alpha = 0.0
-            let labelHeight = self.floatLabelHeight
-            self.lblFloatPlaceholder.frame = CGRect(x: self.x, y: labelHeight, width: self.floatLabelWidth, height: labelHeight)
+            self.lblFloatPlaceholder.frame = CGRect(x: self.lblFloatPlaceholder.frame.origin.x,
+                                                    y: self.lblFloatPlaceholder.font.lineHeight,
+                                                    width: self.lblFloatPlaceholder.bounds.size.width,
+                                                    height: self.lblFloatPlaceholder.bounds.size.height)
         }
         
-        UIView.animate(withDuration: floatingLabelShowAnimationDuration,
-                       delay: 0.0,
-                       options: [.beginFromCurrentState,.curveEaseOut],
-                       animations: animations){ status in
-                        DispatchQueue.main.async {
-                            self.layoutIfNeeded()
-                        }
+        if animated && animateFloatPlaceholder {
+            UIView.animate(withDuration: floatingLabelShowAnimationDuration,
+                           delay: 0.0,
+                           options: [.beginFromCurrentState,.curveEaseOut],
+                           animations: animations){ status in
+                            DispatchQueue.main.async {
+                                self.layoutIfNeeded()
+                            }
+            }
+        }else{
+            animations()
         }
     }
     
     fileprivate func insetRectForEmptyBounds(rect:CGRect) -> CGRect{
-        if showError {
-            let topInset = ((rect.size.height - lblError.bounds.size.height - paddingYErrorLabel) / 2.0) - (ceil(font!.lineHeight) / 2.0)
-            let textY = (rect.height / 2.0) - (ceil(font!.lineHeight) / 2.0) - topInset
-            
-            return CGRect(x: x, y: -ceil(textY), width: rect.size.width, height: rect.size.height)
-        }else{
-            return CGRect(x: x, y: 0.0, width: rect.width, height: rect.height)
-        }
+        
+        guard showErrorLabel else { return CGRect(x: x, y: 0, width: rect.width - paddingX, height: rect.height) }
+        
+        let topInset = (rect.size.height - lblError.bounds.size.height - paddingYErrorLabel - fontHeight) / 2.0
+        let textY = topInset - ((rect.height - fontHeight) / 2.0)
+        
+        return CGRect(x: x, y: floor(textY), width: rect.size.width - paddingX, height: rect.size.height)
     }
     
     fileprivate func insetRectForBounds(rect:CGRect) -> CGRect {
-        guard !lblFloatPlaceholder.text!.isEmptyStr else {
-            return insetRectForEmptyBounds(rect: rect)
-        }
         
-        if let text = text,text.isEmptyStr {
+        guard !lblFloatPlaceholder.text!.isEmptyStr else { return insetRectForEmptyBounds(rect: rect) }
+        
+        if floatingDisplayStatus == .never {
             return insetRectForEmptyBounds(rect: rect)
         }else{
-            let topInset = (paddingYFloatLabel * 2) + lblFloatPlaceholder.bounds.size.height
-            let textY = (rect.height / 2.0) - (ceil(font!.lineHeight) / 2.0) - topInset
-            return CGRect(x: x, y: -ceil(textY), width: rect.size.width, height: rect.size.height)
+            
+            if let text = text,text.isEmptyStr && floatingDisplayStatus == .defaults {
+                return insetRectForEmptyBounds(rect: rect)
+            }else{
+                let topInset = paddingYFloatLabel + lblFloatPlaceholder.bounds.size.height + (paddingHeight / 2.0)
+                let textOriginalY = (rect.height - fontHeight) / 2.0
+                var textY = topInset - textOriginalY
+                
+                if textY < 0 && !showErrorLabel { textY = topInset }
+                
+                return CGRect(x: x, y: ceil(textY), width: rect.size.width - paddingX, height: rect.height)
+            }
         }
     }
     
     @objc fileprivate func textFieldTextChanged(){
-        guard showError else { return }
-        showError = false
+        guard hideErrorWhenEditing && showErrorLabel else { return }
+        showErrorLabel = false
     }
     
     override public var intrinsicContentSize: CGSize{
@@ -268,15 +312,15 @@ public class DTTextField: UITextField {
         
         let textFieldIntrinsicContentSize = super.intrinsicContentSize
         
-        lblFloatPlaceholder.sizeToFit()
         lblError.sizeToFit()
         
-        if showError {
+        if showErrorLabel {
+            lblFloatPlaceholder.sizeToFit()
             return CGSize(width: textFieldIntrinsicContentSize.width,
-                          height: textFieldIntrinsicContentSize.height + (paddingYFloatLabel * 3) + paddingYErrorLabel + lblFloatPlaceholder.bounds.size.height + lblError.bounds.size.height)
+                          height: textFieldIntrinsicContentSize.height + paddingYFloatLabel + paddingYErrorLabel + lblFloatPlaceholder.bounds.size.height + lblError.bounds.size.height + paddingHeight)
         }else{
             return CGSize(width: textFieldIntrinsicContentSize.width,
-                          height: textFieldIntrinsicContentSize.height + (paddingYFloatLabel * 3) + lblFloatPlaceholder.bounds.size.height)
+                          height: textFieldIntrinsicContentSize.height + paddingYFloatLabel + lblFloatPlaceholder.bounds.size.height + paddingHeight)
         }
     }
     
@@ -290,53 +334,66 @@ public class DTTextField: UITextField {
         return insetRectForBounds(rect: rect)
     }
     
-    override public func leftViewRect(forBounds bounds: CGRect) -> CGRect {
-        var rect = super.leftViewRect(forBounds: bounds)
+    fileprivate func insetForSideView(forBounds bounds: CGRect) -> CGRect{
+        var rect = bounds
         rect.origin.y = 0
-        rect.size.height = dtLayer.bounds.height
+        rect.size.height = dtLayerHeight
         return rect
     }
     
+    override public func leftViewRect(forBounds bounds: CGRect) -> CGRect {
+        let rect = super.leftViewRect(forBounds: bounds)
+        return insetForSideView(forBounds: rect)
+    }
+    
     override public func rightViewRect(forBounds bounds: CGRect) -> CGRect {
-        var rect = super.rightViewRect(forBounds: bounds)
-        rect.origin.y = 0
-        rect.size.height = dtLayer.bounds.height
-        return rect
+        let rect = super.rightViewRect(forBounds: bounds)
+        return insetForSideView(forBounds: rect)
     }
     
     override public func clearButtonRect(forBounds bounds: CGRect) -> CGRect {
         var rect = super.clearButtonRect(forBounds: bounds)
-        rect.origin.y = (dtLayer.bounds.height / 2) - (rect.size.height / 2)
+        rect.origin.y = (dtLayerHeight - rect.size.height) / 2
         return rect
     }
     
     override public func layoutSubviews() {
         super.layoutSubviews()
         
-        if showError {
-            
-            dtLayer.frame = CGRect(x: bounds.origin.x,
-                                   y: bounds.origin.y,
-                                   width: bounds.width,
-                                   height: floor(bounds.height - lblError.bounds.size.height - paddingYErrorLabel))
+        CATransaction.begin()
+        CATransaction.setDisableActions(true)
+        dtLayer.frame = CGRect(x: bounds.origin.x,
+                               y: bounds.origin.y,
+                               width: bounds.width,
+                               height: dtLayerHeight)
+        CATransaction.commit()
+        
+        if showErrorLabel {
             
             var lblErrorFrame = lblError.frame
             lblErrorFrame.origin.y = dtLayer.frame.origin.y + dtLayer.frame.size.height + paddingYErrorLabel
             lblError.frame = lblErrorFrame
-            
-        }else{
-            dtLayer.frame = CGRect(x: bounds.origin.x,
-                                   y: bounds.origin.y,
-                                   width: bounds.width,
-                                   height: bounds.height)
         }
         
+        let floatingLabelSize = lblFloatPlaceholder.sizeThatFits(lblFloatPlaceholder.superview!.bounds.size)
+        
+        lblFloatPlaceholder.frame = CGRect(x: x, y: lblFloatPlaceholder.frame.origin.y,
+                                           width: floatingLabelSize.width,
+                                           height: floatingLabelSize.height)
+        
         lblFloatPlaceholder.textColor = isFirstResponder ? floatPlaceholderActiveColor : floatPlaceholderColor
         
-        if let enteredText = text,!enteredText.isEmptyStr{
-            showFloatingLabel()
-        }else{
-            hideFlotingLabel()
+        switch floatingDisplayStatus {
+        case .never:
+            hideFlotingLabel(isFirstResponder)
+        case .always:
+            showFloatingLabel(isFirstResponder)
+        default:
+            if let enteredText = text,!enteredText.isEmptyStr{
+                showFloatingLabel(isFirstResponder)
+            }else{
+                hideFlotingLabel(isFirstResponder)
+            }
         }
     }
 }

Example/.gitignore

@@ -1,3 +1,3 @@
-/DTTextField.xcworkspace/
 /Pods/
 *.lock
+/DTTextField.xcworkspace/

Example/DTTextField.xcodeproj/project.pbxproj

@@ -0,0 +1,448 @@
+// !$*UTF8*$!
+{
+	archiveVersion = 1;
+	classes = {
+	};
+	objectVersion = 46;
+	objects = {
+
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+/* End PBXBuildFile section */
+
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+			proxyType = 1;
+			remoteGlobalIDString = 607FACCF1AFB9204008FA782;
+			remoteInfo = DTTextField;
+		};
+/* End PBXContainerItemProxy section */
+
+/* Begin PBXFileReference section */
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+/* End PBXFrameworksBuildPhase section */
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+/* Begin PBXGroup section */
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+				607FACE81AFB9204008FA782 /* Tests */,
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+			isa = PBXGroup;
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+				F20EFAF61ED7136A00DE8008 /* DTTextField.swift */,
+				607FACD51AFB9204008FA782 /* AppDelegate.swift */,
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+				607FACD91AFB9204008FA782 /* Main.storyboard */,
+				607FACDC1AFB9204008FA782 /* Images.xcassets */,
+				607FACDE1AFB9204008FA782 /* LaunchScreen.xib */,
+				607FACD31AFB9204008FA782 /* Supporting Files */,
+			);
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+		};
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+			);
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+			);
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+			);
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+		};
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+			buildRules = (
+			);
+			dependencies = (
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+/* End PBXNativeTarget section */
+
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+				607FACD61AFB9204008FA782 /* AppDelegate.swift in Sources */,
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+		};
+/* End PBXSourcesBuildPhase section */
+
+/* Begin PBXTargetDependency section */
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+			isa = PBXTargetDependency;
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+			isa = XCBuildConfiguration;
+			buildSettings = {
+				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
+				INFOPLIST_FILE = DTTextField/Info.plist;
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+			name = Release;
+		};
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+
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+}

Example/DTTextField/Base.lproj/Main.storyboard

@@ -1,11 +1,10 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="11762" systemVersion="16C67" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" colorMatched="YES" initialViewController="Kzc-T6-rcN">
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="12118" systemVersion="16E195" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" colorMatched="YES" initialViewController="Kzc-T6-rcN">
     <device id="retina4_7" orientation="portrait">
         <adaptation id="fullscreen"/>
     </device>
     <dependencies>
-        <deployment identifier="iOS"/>
-        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="11757"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="12086"/>
         <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
     </dependencies>
     <scenes>
@@ -27,31 +26,31 @@
                                     <view contentMode="scaleToFill" translatesAutoresizingMaskIntoConstraints="NO" id="T5N-VG-n0n">
                                         <rect key="frame" x="0.0" y="0.0" width="375" height="332"/>
                                         <subviews>
-                                            <textField opaque="NO" clipsSubviews="YES" contentMode="scaleToFill" contentHorizontalAlignment="left" contentVerticalAlignment="center" borderStyle="roundedRect" placeholder="First Name" textAlignment="natural" minimumFontSize="17" translatesAutoresizingMaskIntoConstraints="NO" id="LZk-sC-XSt" customClass="DTTextField" customModule="DTTextField">
+                                            <textField opaque="NO" clipsSubviews="YES" contentMode="scaleToFill" contentHorizontalAlignment="left" contentVerticalAlignment="center" borderStyle="roundedRect" placeholder="First Name" textAlignment="natural" minimumFontSize="17" translatesAutoresizingMaskIntoConstraints="NO" id="LZk-sC-XSt" customClass="DTTextField" customModule="DTTextField_Example" customModuleProvider="target">
                                                 <rect key="frame" x="16" y="50" width="343" height="30"/>
                                                 <nil key="textColor"/>
                                                 <fontDescription key="fontDescription" type="system" pointSize="14"/>
                                                 <textInputTraits key="textInputTraits"/>
                                             </textField>
-                                            <textField opaque="NO" clipsSubviews="YES" contentMode="scaleToFill" contentHorizontalAlignment="left" contentVerticalAlignment="center" borderStyle="roundedRect" placeholder="Last Name" textAlignment="natural" minimumFontSize="17" translatesAutoresizingMaskIntoConstraints="NO" id="ZMK-KE-9Cc" customClass="DTTextField" customModule="DTTextField">
+                                            <textField opaque="NO" clipsSubviews="YES" contentMode="scaleToFill" contentHorizontalAlignment="left" contentVerticalAlignment="center" borderStyle="roundedRect" placeholder="Last Name" textAlignment="natural" minimumFontSize="17" translatesAutoresizingMaskIntoConstraints="NO" id="ZMK-KE-9Cc" customClass="DTTextField" customModule="DTTextField_Example" customModuleProvider="target">
                                                 <rect key="frame" x="16" y="88" width="343" height="30"/>
                                                 <nil key="textColor"/>
                                                 <fontDescription key="fontDescription" type="system" pointSize="14"/>
                                                 <textInputTraits key="textInputTraits"/>
                                             </textField>
-                                            <textField opaque="NO" clipsSubviews="YES" contentMode="scaleToFill" contentHorizontalAlignment="left" contentVerticalAlignment="center" borderStyle="roundedRect" placeholder="Email" textAlignment="natural" minimumFontSize="17" translatesAutoresizingMaskIntoConstraints="NO" id="6gk-3f-Yz6" customClass="DTTextField" customModule="DTTextField">
+                                            <textField opaque="NO" clipsSubviews="YES" contentMode="scaleToFill" contentHorizontalAlignment="left" contentVerticalAlignment="center" borderStyle="roundedRect" placeholder="Email" textAlignment="natural" minimumFontSize="17" translatesAutoresizingMaskIntoConstraints="NO" id="6gk-3f-Yz6" customClass="DTTextField" customModule="DTTextField_Example" customModuleProvider="target">
                                                 <rect key="frame" x="16" y="126" width="343" height="30"/>
                                                 <nil key="textColor"/>
                                                 <fontDescription key="fontDescription" type="system" pointSize="14"/>
                                                 <textInputTraits key="textInputTraits"/>
                                             </textField>
-                                            <textField opaque="NO" clipsSubviews="YES" contentMode="scaleToFill" contentHorizontalAlignment="left" contentVerticalAlignment="center" borderStyle="roundedRect" placeholder="Password" textAlignment="natural" minimumFontSize="17" translatesAutoresizingMaskIntoConstraints="NO" id="63c-z6-Pat" customClass="DTTextField" customModule="DTTextField">
+                                            <textField opaque="NO" clipsSubviews="YES" contentMode="scaleToFill" contentHorizontalAlignment="left" contentVerticalAlignment="center" borderStyle="roundedRect" placeholder="Password" textAlignment="natural" minimumFontSize="17" translatesAutoresizingMaskIntoConstraints="NO" id="63c-z6-Pat" customClass="DTTextField" customModule="DTTextField_Example" customModuleProvider="target">
                                                 <rect key="frame" x="16" y="164" width="343" height="30"/>
                                                 <nil key="textColor"/>
                                                 <fontDescription key="fontDescription" type="system" pointSize="14"/>
                                                 <textInputTraits key="textInputTraits" secureTextEntry="YES"/>
                                             </textField>
-                                            <textField opaque="NO" clipsSubviews="YES" contentMode="scaleToFill" contentHorizontalAlignment="left" contentVerticalAlignment="center" borderStyle="roundedRect" placeholder="Confirm Password" textAlignment="natural" minimumFontSize="17" translatesAutoresizingMaskIntoConstraints="NO" id="zBn-BA-f2Y" customClass="DTTextField" customModule="DTTextField">
+                                            <textField opaque="NO" clipsSubviews="YES" contentMode="scaleToFill" contentHorizontalAlignment="left" contentVerticalAlignment="center" borderStyle="roundedRect" placeholder="Confirm Password" textAlignment="natural" minimumFontSize="17" translatesAutoresizingMaskIntoConstraints="NO" id="zBn-BA-f2Y" customClass="DTTextField" customModule="DTTextField_Example" customModuleProvider="target">
                                                 <rect key="frame" x="16" y="202" width="343" height="30"/>
                                                 <nil key="textColor"/>
                                                 <fontDescription key="fontDescription" type="system" pointSize="14"/>
@@ -108,6 +107,7 @@
                     </view>
                     <navigationItem key="navigationItem" id="W1x-bm-hbZ"/>
                     <connections>
+                        <outlet property="scrollView" destination="3qx-l3-jfU" id="Wim-19-5FL"/>
                         <outlet property="txtConfirmPassword" destination="zBn-BA-f2Y" id="kBp-NH-lSI"/>
                         <outlet property="txtEmail" destination="6gk-3f-Yz6" id="0vh-rG-4OR"/>
                         <outlet property="txtFirstName" destination="LZk-sC-XSt" id="gxg-Mj-Ljm"/>

Example/DTTextField/DTTextField.swift

@@ -0,0 +1,399 @@
+//
+//  DTTextField.swift
+//  Pods
+//
+//  Created by Dhaval Thanki on 03/04/17.
+//
+//
+
+import Foundation
+import UIKit
+
+public extension String {
+    
+    var isEmptyStr:Bool{
+        return self.trimmingCharacters(in: NSCharacterSet.whitespaces).isEmpty
+    }
+}
+
+public class DTTextField: UITextField {
+    
+    public enum FloatingDisplayStatus{
+        case always
+        case never
+        case defaults
+    }
+    
+    fileprivate var lblFloatPlaceholder:UILabel             = UILabel()
+    fileprivate var lblError:UILabel                        = UILabel()
+    
+    fileprivate let paddingX:CGFloat                        = 5.0
+    
+    fileprivate let paddingHeight:CGFloat                   = 10.0
+    
+    public var dtLayer:CALayer                              = CALayer()
+    public var floatPlaceholderColor:UIColor                = UIColor.black
+    public var floatPlaceholderActiveColor:UIColor          = UIColor.black
+    public var floatingLabelShowAnimationDuration           = 0.3
+    public var floatingDisplayStatus:FloatingDisplayStatus  = .defaults
+    
+    public var errorMessage:String = ""{
+        didSet{ lblError.text = errorMessage }
+    }
+    
+    public var animateFloatPlaceholder:Bool = true
+    public var hideErrorWhenEditing:Bool   = true
+    
+    public var errorFont = UIFont.systemFont(ofSize: 10.0){
+        didSet{ invalidateIntrinsicContentSize() }
+    }
+    
+    public var floatPlaceholderFont = UIFont.systemFont(ofSize: 10.0){
+        didSet{ invalidateIntrinsicContentSize() }
+    }
+    
+    public var paddingYFloatLabel:CGFloat = 3.0{
+        didSet{ invalidateIntrinsicContentSize() }
+    }
+    
+    public var paddingYErrorLabel:CGFloat = 3.0{
+        didSet{ invalidateIntrinsicContentSize() }
+    }
+    
+    public var borderColor:UIColor = UIColor(red: 204.0/255.0, green: 204.0/255.0, blue: 204.0/255.0, alpha: 1.0){
+        didSet{ dtLayer.borderColor = borderColor.cgColor }
+    }
+    
+    public var canShowBorder:Bool = true{
+        didSet{ dtLayer.isHidden = !canShowBorder }
+    }
+    
+    public var placeholderColor:UIColor?{
+        didSet{
+            guard let color = placeholderColor else { return }
+            attributedPlaceholder = NSAttributedString(string: placeholderFinal,
+                                                       attributes: [NSForegroundColorAttributeName:color])
+        }
+    }
+    
+    fileprivate var x:CGFloat {
+        
+        if let leftView = leftView {
+            return leftView.frame.origin.x + leftView.bounds.size.width + paddingX
+        }
+        
+        return paddingX
+    }
+    
+    fileprivate var fontHeight:CGFloat{
+        return ceil(font!.lineHeight)
+    }
+    
+    fileprivate var dtLayerHeight:CGFloat{
+        return showErrorLabel ? floor(bounds.height - lblError.bounds.size.height - paddingYErrorLabel) : bounds.height
+    }
+    
+    fileprivate var floatLabelWidth:CGFloat{
+        
+        var width = bounds.size.width
+        
+        if let leftViewWidth = leftView?.bounds.size.width{
+            width -= leftViewWidth
+        }
+        
+        if let rightViewWidth = rightView?.bounds.size.width {
+            width -= rightViewWidth
+        }
+        
+        return width - (self.x * 2)
+    }
+    
+    fileprivate var placeholderFinal:String{
+        if let attributed = attributedPlaceholder { return attributed.string }
+        return placeholder ?? " "
+    }
+    
+    fileprivate var isFloatLabelShowing:Bool = false
+    
+    fileprivate var showErrorLabel:Bool = false{
+        didSet{
+            
+            guard showErrorLabel != oldValue else { return }
+            
+            guard showErrorLabel else {
+                hideErrorMessage()
+                return
+            }
+            
+            guard !errorMessage.isEmptyStr else { return }
+            showErrorMessage()
+        }
+    }
+    
+    override public var borderStyle: UITextBorderStyle{
+        didSet{
+            guard borderStyle != oldValue else { return }
+            borderStyle = .none
+        }
+    }
+    
+    public override var text: String?{
+        didSet{ self.textFieldTextChanged() }
+    }
+    
+    override public var placeholder: String?{
+        didSet{
+            
+            guard let color = placeholderColor else {
+                lblFloatPlaceholder.text = placeholderFinal
+                return
+            }
+            attributedPlaceholder = NSAttributedString(string: placeholderFinal,
+                                                       attributes: [NSForegroundColorAttributeName:color])
+        }
+    }
+    
+    override public var attributedPlaceholder: NSAttributedString?{
+        didSet{ lblFloatPlaceholder.text = placeholderFinal }
+    }
+    
+    override public init(frame: CGRect) {
+        super.init(frame: frame)
+        commonInit()
+    }
+    
+    required public init?(coder aDecoder: NSCoder) {
+        super.init(coder: aDecoder)
+        commonInit()
+    }
+    
+    public func showError(message:String? = nil) {
+        if let msg = message { errorMessage = msg }
+        showErrorLabel = true
+    }
+    
+    public func hideError()  {
+        showErrorLabel = false
+    }
+    
+    fileprivate func commonInit() {
+        
+        dtLayer.cornerRadius        = 4.5
+        dtLayer.borderWidth         = 0.5
+        dtLayer.borderColor         = borderColor.cgColor
+        dtLayer.backgroundColor     = UIColor.white.cgColor
+        
+        floatPlaceholderColor       = UIColor(red: 204.0/255.0, green: 204.0/255.0, blue: 204.0/255.0, alpha: 1.0)
+        floatPlaceholderActiveColor = tintColor
+        lblFloatPlaceholder.frame   = CGRect.zero
+        lblFloatPlaceholder.alpha   = 0.0
+        lblFloatPlaceholder.font    = floatPlaceholderFont
+        lblFloatPlaceholder.text    = placeholderFinal
+        
+        addSubview(lblFloatPlaceholder)
+        
+        lblError.frame              = CGRect.zero
+        lblError.font               = errorFont
+        lblError.textColor          = UIColor.red
+        lblError.numberOfLines      = 0
+        lblError.isHidden           = true
+        
+        addTarget(self, action: #selector(textFieldTextChanged), for: .editingChanged)
+        
+        addSubview(lblError)
+        
+        layer.insertSublayer(dtLayer, at: 0)
+    }
+    
+    fileprivate func showErrorMessage(){
+        
+        lblError.text = errorMessage
+        lblError.isHidden = false
+        let boundWithPadding = CGSize(width: bounds.width - (x * 2), height: bounds.height)
+        let errorLabelSize =  lblError.sizeThatFits(boundWithPadding)
+        lblError.frame = CGRect(x: paddingX, y: 0, width: errorLabelSize.width, height: errorLabelSize.height)
+        invalidateIntrinsicContentSize()
+    }
+    
+    fileprivate func hideErrorMessage(){
+        lblError.text = ""
+        lblError.isHidden = true
+        lblError.frame = CGRect.zero
+        invalidateIntrinsicContentSize()
+    }
+    
+    fileprivate func showFloatingLabel(_ animated:Bool) {
+        
+        let animations:(()->()) = {
+            self.lblFloatPlaceholder.alpha = 1.0
+            self.lblFloatPlaceholder.frame = CGRect(x: self.lblFloatPlaceholder.frame.origin.x,
+                                                    y: self.paddingYFloatLabel,
+                                                    width: self.lblFloatPlaceholder.bounds.size.width,
+                                                    height: self.lblFloatPlaceholder.bounds.size.height)
+        }
+        
+        if animated && animateFloatPlaceholder {
+            UIView.animate(withDuration: floatingLabelShowAnimationDuration,
+                           delay: 0.0,
+                           options: [.beginFromCurrentState,.curveEaseOut],
+                           animations: animations){ status in
+                            DispatchQueue.main.async {
+                                self.layoutIfNeeded()
+                            }
+            }
+        }else{
+            animations()
+        }
+    }
+    
+    fileprivate func hideFlotingLabel(_ animated:Bool) {
+        
+        let animations:(()->()) = {
+            self.lblFloatPlaceholder.alpha = 0.0
+            self.lblFloatPlaceholder.frame = CGRect(x: self.lblFloatPlaceholder.frame.origin.x,
+                                                    y: self.lblFloatPlaceholder.font.lineHeight,
+                                                    width: self.lblFloatPlaceholder.bounds.size.width,
+                                                    height: self.lblFloatPlaceholder.bounds.size.height)
+        }
+        
+        if animated && animateFloatPlaceholder {
+            UIView.animate(withDuration: floatingLabelShowAnimationDuration,
+                           delay: 0.0,
+                           options: [.beginFromCurrentState,.curveEaseOut],
+                           animations: animations){ status in
+                            DispatchQueue.main.async {
+                                self.layoutIfNeeded()
+                            }
+            }
+        }else{
+            animations()
+        }
+    }
+    
+    fileprivate func insetRectForEmptyBounds(rect:CGRect) -> CGRect{
+        
+        guard showErrorLabel else { return CGRect(x: x, y: 0, width: rect.width - paddingX, height: rect.height) }
+        
+        let topInset = (rect.size.height - lblError.bounds.size.height - paddingYErrorLabel - fontHeight) / 2.0
+        let textY = topInset - ((rect.height - fontHeight) / 2.0)
+        
+        return CGRect(x: x, y: floor(textY), width: rect.size.width - paddingX, height: rect.size.height)
+    }
+    
+    fileprivate func insetRectForBounds(rect:CGRect) -> CGRect {
+        
+        guard !lblFloatPlaceholder.text!.isEmptyStr else { return insetRectForEmptyBounds(rect: rect) }
+        
+        if floatingDisplayStatus == .never {
+            return insetRectForEmptyBounds(rect: rect)
+        }else{
+            
+            if let text = text,text.isEmptyStr && floatingDisplayStatus == .defaults {
+                return insetRectForEmptyBounds(rect: rect)
+            }else{
+                let topInset = paddingYFloatLabel + lblFloatPlaceholder.bounds.size.height + (paddingHeight / 2.0)
+                let textOriginalY = (rect.height - fontHeight) / 2.0
+                var textY = topInset - textOriginalY
+                
+                if textY < 0 && !showErrorLabel { textY = topInset }
+                
+                return CGRect(x: x, y: ceil(textY), width: rect.size.width - paddingX, height: rect.height)
+            }
+        }
+    }
+    
+    @objc fileprivate func textFieldTextChanged(){
+        guard hideErrorWhenEditing && showErrorLabel else { return }
+        showErrorLabel = false
+    }
+    
+    override public var intrinsicContentSize: CGSize{
+        self.layoutIfNeeded()
+        
+        let textFieldIntrinsicContentSize = super.intrinsicContentSize
+        
+        lblError.sizeToFit()
+        
+        if showErrorLabel {
+            lblFloatPlaceholder.sizeToFit()
+            return CGSize(width: textFieldIntrinsicContentSize.width,
+                          height: textFieldIntrinsicContentSize.height + paddingYFloatLabel + paddingYErrorLabel + lblFloatPlaceholder.bounds.size.height + lblError.bounds.size.height + paddingHeight)
+        }else{
+            return CGSize(width: textFieldIntrinsicContentSize.width,
+                          height: textFieldIntrinsicContentSize.height + paddingYFloatLabel + lblFloatPlaceholder.bounds.size.height + paddingHeight)
+        }
+    }
+    
+    override public func textRect(forBounds bounds: CGRect) -> CGRect {
+        let rect = super.textRect(forBounds: bounds)
+        return insetRectForBounds(rect: rect)
+    }
+    
+    override public func editingRect(forBounds bounds: CGRect) -> CGRect {
+        let rect = super.editingRect(forBounds: bounds)
+        return insetRectForBounds(rect: rect)
+    }
+    
+    fileprivate func insetForSideView(forBounds bounds: CGRect) -> CGRect{
+        var rect = bounds
+        rect.origin.y = 0
+        rect.size.height = dtLayerHeight
+        return rect
+    }
+    
+    override public func leftViewRect(forBounds bounds: CGRect) -> CGRect {
+        let rect = super.leftViewRect(forBounds: bounds)
+        return insetForSideView(forBounds: rect)
+    }
+    
+    override public func rightViewRect(forBounds bounds: CGRect) -> CGRect {
+        let rect = super.rightViewRect(forBounds: bounds)
+        return insetForSideView(forBounds: rect)
+    }
+    
+    override public func clearButtonRect(forBounds bounds: CGRect) -> CGRect {
+        var rect = super.clearButtonRect(forBounds: bounds)
+        rect.origin.y = (dtLayerHeight - rect.size.height) / 2
+        return rect
+    }
+    
+    override public func layoutSubviews() {
+        super.layoutSubviews()
+        
+        CATransaction.begin()
+        CATransaction.setDisableActions(true)
+        dtLayer.frame = CGRect(x: bounds.origin.x,
+                               y: bounds.origin.y,
+                               width: bounds.width,
+                               height: dtLayerHeight)
+        CATransaction.commit()
+        
+        if showErrorLabel {
+            
+            var lblErrorFrame = lblError.frame
+            lblErrorFrame.origin.y = dtLayer.frame.origin.y + dtLayer.frame.size.height + paddingYErrorLabel
+            lblError.frame = lblErrorFrame
+        }
+        
+        let floatingLabelSize = lblFloatPlaceholder.sizeThatFits(lblFloatPlaceholder.superview!.bounds.size)
+        
+        lblFloatPlaceholder.frame = CGRect(x: x, y: lblFloatPlaceholder.frame.origin.y,
+                                           width: floatingLabelSize.width,
+                                           height: floatingLabelSize.height)
+        
+        lblFloatPlaceholder.textColor = isFirstResponder ? floatPlaceholderActiveColor : floatPlaceholderColor
+        
+        switch floatingDisplayStatus {
+        case .never:
+            hideFlotingLabel(isFirstResponder)
+        case .always:
+            showFloatingLabel(isFirstResponder)
+        default:
+            if let enteredText = text,!enteredText.isEmptyStr{
+                showFloatingLabel(isFirstResponder)
+            }else{
+                hideFlotingLabel(isFirstResponder)
+            }
+        }
+    }
+}

Example/DTTextField/Images.xcassets/AppIcon.appiconset/Contents.json

@@ -1,5 +1,15 @@
 {
   "images" : [
+    {
+      "idiom" : "iphone",
+      "size" : "20x20",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "iphone",
+      "size" : "20x20",
+      "scale" : "3x"
+    },
     {
       "idiom" : "iphone",
       "size" : "29x29",
@@ -35,4 +45,4 @@
     "version" : 1,
     "author" : "xcode"
   }
-}
+}

Example/DTTextField/ViewController.swift

@@ -7,10 +7,10 @@
 //
 
 import UIKit
-import DTTextField
 
 class ViewController: UIViewController {
 
+    @IBOutlet weak var scrollView: UIScrollView!
     @IBOutlet weak var txtFirstName: DTTextField!
     @IBOutlet weak var txtLastName: DTTextField!
     @IBOutlet weak var txtEmail: DTTextField!
@@ -27,16 +27,23 @@ class ViewController: UIViewController {
     override func viewDidLoad() {
         super.viewDidLoad()
         
-        title                           = "Registration"
-        txtFirstName.errorMessage       = firstNameMessage
-        txtLastName.errorMessage        = lastNameMessage
-        txtEmail.errorMessage           = emailMessage
-        txtPassword.errorMessage        = passwordMessage
-        txtConfirmPassword.errorMessage = confirmPasswordMessage
-        
+        title = "Registration"
         // Do any additional setup after loading the view, typically from a nib.
     }
     
+    override func viewWillAppear(_ animated: Bool) {
+        super.viewWillAppear(animated)
+        
+        NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow(notification:)), name: .UIKeyboardWillShow, object: nil)
+        NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide(notification:)), name: .UIKeyboardWillHide, object: nil)
+    }
+    
+    override func viewWillDisappear(_ animated: Bool) {
+        super.viewWillDisappear(animated)
+        NotificationCenter.default.removeObserver(self, name: .UIKeyboardWillShow, object: nil)
+        NotificationCenter.default.removeObserver(self, name: .UIKeyboardWillHide, object: nil)
+    }
+    
     override func didReceiveMemoryWarning() {
         super.didReceiveMemoryWarning()
         // Dispose of any resources that can be recreated.
@@ -67,38 +74,44 @@ class ViewController: UIViewController {
 // MARK: User Define Methods
 extension ViewController{
     
+    func keyboardWillShow(notification:Notification) {
+        guard let keyboardHeight = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue else { return }
+        scrollView.contentInset = UIEdgeInsetsMake(0, 0, keyboardHeight.height, 0)
+    }
+    
+    func keyboardWillHide(notification:Notification) {
+        scrollView.contentInset = .zero
+    }
     
     func validateData() -> Bool {
         
         guard !txtFirstName.text!.isEmptyStr else {
-            txtFirstName.showError = true
+            txtFirstName.showError(message: firstNameMessage)
             return false
         }
         
         guard !txtLastName.text!.isEmptyStr else {
-            txtLastName.showError = true
+            txtLastName.showError(message: lastNameMessage)
             return false
         }
         
         guard !txtEmail.text!.isEmptyStr else {
-            txtEmail.showError = true
+            txtEmail.showError(message: emailMessage)
             return false
         }
         
         guard !txtPassword.text!.isEmptyStr else {
-            txtPassword.showError = true
+            txtPassword.showError(message: passwordMessage)
             return false
         }
         
         guard !txtConfirmPassword.text!.isEmptyStr else {
-            txtConfirmPassword.errorMessage = confirmPasswordMessage
-            txtConfirmPassword.showError = true
+            txtConfirmPassword.showError(message: confirmPasswordMessage)
             return false
         }
         
         guard txtPassword.text == txtConfirmPassword.text else {
-            txtConfirmPassword.errorMessage = mismatchPasswordMessage
-            txtConfirmPassword.showError = true
+            txtConfirmPassword.showError(message: mismatchPasswordMessage)
             return false
         }
         

Example/Podfile

@@ -1,11 +0,0 @@
-use_frameworks!
-
-target 'DTTextField_Example' do
-  pod 'DTTextField', :path => '../'
-
-  target 'DTTextField_Tests' do
-    inherit! :search_paths
-
-    
-  end
-end

README.md

@@ -1,16 +1,28 @@
 # DTTextField
 
-![Version](https://img.shields.io/badge/Version-0.1.0-green.svg)
-![License](https://img.shields.io/github/license/mashape/apistatus.svg)
-![Platform](https://img.shields.io/badge/Swift-3.0-orange.svg)
+[![Version](https://img.shields.io/badge/Pod-V0.2.5-green.svg)](https://github.com/iDhaval/DTTextField/releases/tag/0.2.4)
+[![License](https://img.shields.io/github/license/mashape/apistatus.svg)](https://github.com/iDhaval/DTTextField/blob/master/LICENSE)
+[![Awesome](https://cdn.rawgit.com/sindresorhus/awesome/d7305f38d29fed78fa85652e3a63e154dd8e8829/media/badge.svg)](https://github.com/matteocrippa/awesome-swift)
+[![Platform](https://img.shields.io/badge/Language-Swift_3.0-orange.svg)](https://developer.apple.com/library/content/documentation/Swift/Conceptual/Swift_Programming_Language/)
 ![Xcode](https://img.shields.io/badge/Xcode-8.0-blue.svg)
 
+![Demo](https://github.com/iDhaval/DTTextField/blob/master/DTTextField.gif?raw=true)
+
+## Introduction
+
+DTTextField is a UITextField library with floating placeholder and error label.
+
+Floating placeholder inspired from [JVFloatLabeledTextField](https://github.com/jverdi/JVFloatLabeledTextField) :+1:.
+
 ## Example
 
-To run the example project, clone the repo, and run `pod install` from the Example directory first.
+Clone the repo and run the example project from the Example directory.
 
 ## Requirements
 
+* Xcode 8.0
+* Swift 3.0
+
 ## Installation
 
 DTTextField is available through [CocoaPods](http://cocoapods.org). To install
@@ -20,10 +32,54 @@ it, simply add the following line to your Podfile:
 pod 'DTTextField'
 ```
 
+## Usage
+
+1. Open a storyboard or Xib file.  
+2. Drag and drop a `UITextField` to a ViewController.  
+3. In Identity Inspector, replace the class from `UITextField` to `DTTextField` and the module to `DTTextField`.  
+
+## Properties
+
+| Property name | Type | Remark |
+| ------------- |------------- | ----- |
+| errorMessage | String | Add your error message to this property|
+| errorFont | UIFont | Change font of error text |
+| paddingYErrorLabel | CGFloat | Error text top padding |
+| floatPlaceholderColor | UIColor | To change float placeholder color |
+| floatPlaceholderActiveColor | UIColor | To change float placeholder color while TextField is active(First responder)|
+| floatPlaceholderFont | UIFont | Change font of float placeholder |
+| paddingYFloatLabel | CGFloat | float placeholder top padding |
+| placeholderColor | UIColor | change placeholder color |
+| animateFloatPlaceholder | Bool | animate float placeholder label |
+| hideErrorWhenEditing | Bool | hide error label when typing |
+| floatingDisplayStatus | enum | maintain display status always, never, defaults | 
+
+### Important Properties
+
+| Property name | Type | Remark |
+| ------------- |------------- | ----- |
+| dtLayer | CALayer | If you want to formate DTTextField than use dtLayer property instead of layer |
+| borderColor | UIColor | Change border color of DTTextField |
+| canShowBorder | Bool | Toggle border of DTTextField |
+
+## Methods
+
+| Method Name | Remark |
+| ------------|--------|
+| showError | to show error message |
+| hideError | to hide error message |
+
+## Note
+
+Don't give height constraint to DTTextField otherwise it won't work properly.
+
+## TODO
+* Add inbuilt validation
+
 ## Author
 
-Dhaval Thanki
+Dhaval Thanki :sunglasses:
 
 ## License
 
-DTTextField is available under the MIT license. See the LICENSE file for more info.
+```DTTextField``` is available under the MIT license. See the [LICENSE](https://github.com/iDhaval/DTTextField/blob/master/LICENSE) file for more info.