blocks|key|4574213|text|要为应用程序中的所有UITextField一次性设置占位符颜色，您可以执行以下操作：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4574214|UILabel.appearanceWhenContainedInInstancesOfClasses([UITextField.self]).textColor+=+UIColor.redColor()|code-block|syntax|javascript|4574215|这将为整个应用程序中的所有TextField占位符设置所需的颜色。但它只在iOS+9之后才可用。|4574216|在iOS+9之前，swift中没有appearenceWhenContainedIn....()方法，但您可以使用此处提供的解决方案之一appearanceWhenContainedIn+in+Swift|4574217|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/24136874/appearancewhencontainedin-in-swift^0|A|B|0|0|D|9|0|1W|Y|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@$9|X|A|Y|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|Z|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|10|8|@$9|11|A|12|B|C]]|D|@]|E|$]]|$1|M|3|N|5|6|7|13|8|@]|D|@$9|14|A|15|1|16]]|E|$]]|$1|O|3|-4|5|6|7|17|8|@]|D|@]|E|$]]]|P|$Q|$5|R|S|T|E|$U|V]]]]

To set the placeholder color once for all the <code>UITextField</code> in your app you can do:

<pre><code>UILabel.appearanceWhenContainedInInstancesOfClasses([UITextField.self]).textColor = UIColor.redColor()
</code></pre>

This will set the desired color for all <code>TextField</code> placeholders in the entire app. But it is only available since iOS 9.

There is no appearenceWhenContainedIn....() method before iOS 9 in swift but you can use one of the solutions provided here <a href="https://stackoverflow.com/questions/24136874/appearancewhencontainedin-in-swift">appearanceWhenContainedIn in Swift</a>

blocks|key|67814|text|如下所示创建UITextField扩展：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|67815|extension+UITextField{
+++@IBInspectable+var+placeHolderColor:+UIColor?+{
++++++++get+{
++++++++++++return+self.placeHolderColor
++++++++}
++++++++set+{
++++++++++++self.attributedPlaceholder+=+NSAttributedString(string:self.placeholder+!=+nil+?+self.placeholder!+:+"",+attributes:[NSAttributedString.Key.foregroundColor:+newValue!])
++++++++}
++++}
}|code-block|syntax|javascript|67816|在你的故事板或.xib中。你会看到|67817|​|67818|📷|atomic|67819|67820|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/b6ae048102b0a5c2a4a3449f5a73f9e1.png|imageAlt^0|6|B|0|0|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|11|8|@$9|12|A|13|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|14|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|15|8|@]|D|@]|E|$]]|$1|M|3|N|5|6|7|16|8|@]|D|@]|E|$]]|$1|O|3|P|5|Q|7|17|8|@]|D|@$9|18|A|19|1|1A]]|E|$]]|$1|R|3|N|5|6|7|1B|8|@]|D|@]|E|$]]|$1|S|3|-4|5|6|7|1C|8|@]|D|@]|E|$]]]|T|$U|$5|V|W|X|E|$Y|Z|10|-4]]]]

Create <code>UITextField</code> Extension like this:

<pre><code>extension UITextField{
 @IBInspectable var placeHolderColor: UIColor? {
 get {
 return self.placeHolderColor
 }
 set {
 self.attributedPlaceholder = NSAttributedString(string:self.placeholder != nil ? self.placeholder! : "", attributes:[NSAttributedString.Key.foregroundColor: newValue!])
 }
 }
}
</code></pre>

And in your storyboard or .xib. You will see

<a href="https://i.stack.imgur.com/jnE0L.png" rel="noreferrer"><img src="https://i.stack.imgur.com/jnE0L.png" alt="enter image description here"></a>

blocks|key|4574378|text|下面的代码可以在Swift3中运行：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4574379|yourTextFieldName+.setValue(UIColor.init(colorLiteralRed:+80/255,+green:+80/255,+blue:+80/255,+alpha:+1.0),+forKeyPath:+"_placeholderLabel.textColor")|code-block|syntax|javascript|4574380|如果你有任何问题，请告诉我。|4574381|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

This code is working in Swift3:

<pre><code>yourTextFieldName .setValue(UIColor.init(colorLiteralRed: 80/255, green: 80/255, blue: 80/255, alpha: 1.0), forKeyPath: "_placeholderLabel.textColor")
</code></pre>

let me know if you have any issue.

blocks|key|67887|text|Swift+3(可能是2)，您可以重写UITextField子类中占位符上的didSet以对其应用属性，方法如下：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|67888|override+var+placeholder:+String?+{

++++didSet+{
++++++++guard+let+tmpText+=+placeholder+else+{
++++++++++++self.attributedPlaceholder+=+NSAttributedString(string:+"")
++++++++++++return
++++++++}

++++++++let+textRange+=+NSMakeRange(0,+tmpText.characters.count)
++++++++let+attributedText+=+NSMutableAttributedString(string:+tmpText)
++++++++attributedText.addAttribute(NSForegroundColorAttributeName+,+value:UIColor(white:147.0/255.0,+alpha:1.0),+range:+textRange)

++++++++self.attributedPlaceholder+=+attributedText
++++}
}|code-block|syntax|javascript|67889|entityMap^0|J|B|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

Swift 3 (probably 2), you can override didSet on placeholder in <code>UITextField</code> subclass to apply attribute on it, this way:

<pre><code>override var placeholder: String? {

 didSet {
 guard let tmpText = placeholder else {
 self.attributedPlaceholder = NSAttributedString(string: "")
 return
 }

 let textRange = NSMakeRange(0, tmpText.characters.count)
 let attributedText = NSMutableAttributedString(string: tmpText)
 attributedText.addAttribute(NSForegroundColorAttributeName , value:UIColor(white:147.0/255.0, alpha:1.0), range: textRange)

 self.attributedPlaceholder = attributedText
 }
}
</code></pre>

blocks|key|67893|text|yourTextfield.attributedPlaceholder+=+NSAttributedString(string:+"your+placeholder+text",attributes:+[NSForegroundColorAttributeName:+UIColor.white])|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|67894|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>yourTextfield.attributedPlaceholder = NSAttributedString(string: "your placeholder text",attributes: [NSForegroundColorAttributeName: UIColor.white])
</code></pre>

blocks|key|67929|text|在Swift+3.0中，使用|type|unstyled|depth|inlineStyleRanges|entityRanges|data|67930|let+color+=+UIColor.lightText
textField.attributedPlaceholder+=+NSAttributedString(string:+textField.placeholder,+attributes:+[NSForegroundColorAttributeName+:+color])|code-block|syntax|javascript|67931|在Siwft+5.0+%2B中使用|67932|let+color+=+UIColor.lightText
let+placeholder+=+textField.placeholder+??+""+//There+should+be+a+placeholder+set+in+storyboard+or+elsewhere+string+or+pass+empty
textField.attributedPlaceholder+=+NSAttributedString(string:+placeholder,+attributes:+[NSAttributedString.Key.foregroundColor+:+color])|67933|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

In Swift 3.0, Use

<pre><code>let color = UIColor.lightText
textField.attributedPlaceholder = NSAttributedString(string: textField.placeholder, attributes: [NSForegroundColorAttributeName : color])
</code></pre>

In Siwft 5.0 + Use

<pre><code>let color = UIColor.lightText
let placeholder = textField.placeholder ?? "" //There should be a placeholder set in storyboard or elsewhere string or pass empty
textField.attributedPlaceholder = NSAttributedString(string: placeholder, attributes: [NSAttributedString.Key.foregroundColor : color])
</code></pre>

blocks|key|67984|text|对于Swift|type|unstyled|depth|inlineStyleRanges|entityRanges|data|67985|func+setPlaceholderColor(textField:+UITextField,+placeholderText:+String)+{
++++textField.attributedPlaceholder+=+NSAttributedString(string:+placeholderText,+attributes:+[NSForegroundColorAttributeName:+UIColor.pelorBlack])
}|code-block|syntax|javascript|67986|你可以使用这个；|67987|self.setPlaceholderColor(textField:+self.emailTextField,+placeholderText:+"E-Mail/Username")|67988|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

For Swift

<pre><code>func setPlaceholderColor(textField: UITextField, placeholderText: String) {
 textField.attributedPlaceholder = NSAttributedString(string: placeholderText, attributes: [NSForegroundColorAttributeName: UIColor.pelorBlack])
}
</code></pre>

You can use this;

<pre><code>self.setPlaceholderColor(textField: self.emailTextField, placeholderText: "E-Mail/Username")
</code></pre>

blocks|key|4574510|text|使用此命令添加属性化占位符：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4574511|let+attributes+:+[String+:+Any]++=+[+NSForegroundColorAttributeName:+UIColor.lightGray,
+++++++++++++++++++++++++++++++++++++NSFontAttributeName+:+UIFont(name:+"Helvetica+Neue+Light+Italic",+size:+12.0)!
+++++++++++++++++++++++++++++++++++]
x_textfield.attributedPlaceholder+=+NSAttributedString(string:+"Placeholder+Text",+attributes:attributes)|code-block|syntax|javascript|4574512|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Use this for adding an attributed placeholder:

<pre><code>let attributes : [String : Any] = [ NSForegroundColorAttributeName: UIColor.lightGray,
 NSFontAttributeName : UIFont(name: "Helvetica Neue Light Italic", size: 12.0)!
 ]
x_textfield.attributedPlaceholder = NSAttributedString(string: "Placeholder Text", attributes:attributes)
</code></pre>

blocks|key|68030|text|对于Swift+3和3.1，这非常好用：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|68031|passField.attributedPlaceholder+=+NSAttributedString(string:+"password",+attributes:+[NSForegroundColorAttributeName:+UIColor.white])|code-block|syntax|javascript|68032|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

For Swift 3 and 3.1 this works perfectly fine:

<pre><code>passField.attributedPlaceholder = NSAttributedString(string: "password", attributes: [NSForegroundColorAttributeName: UIColor.white])
</code></pre>

blocks|key|4574567|text|它更多的是关于个性化你的textField，但不管怎样，我会分享从另一个页面得到的代码，并使它变得更好：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4574568|import+UIKit
extension+UITextField+{
func+setBottomLine(borderColor:+UIColor,+fontColor:+UIColor,+placeHolderColor:UIColor,+placeHolder:+String)+{
++++self.borderStyle+=+UITextBorderStyle.none
++++self.backgroundColor+=+UIColor.clear
++++let+borderLine+=+UIView()
++++let+height+=+1.0
++++borderLine.frame+=+CGRect(x:+0,+y:+Double(self.frame.height)+-+height,+width:+Double(self.frame.width),+height:+height)
++++self.textColor+=+fontColor
++++borderLine.backgroundColor+=+borderColor
++++self.addSubview(borderLine)
++++self.attributedPlaceholder+=+NSAttributedString(
++++++++string:+placeHolder,
++++++++attributes:+[NSAttributedStringKey.foregroundColor:+placeHolderColor]
++++)
++}
}|code-block|syntax|javascript|4574569|你可以这样使用它：|4574570|self.textField.setBottomLine(borderColor:+lineColor,+fontColor:+fontColor,+placeHolderColor:+placeHolderColor,+placeHolder:+placeHolder)|4574571|知道您已将UITextField连接到ViewController。|offset|length|style|CODE|4574572|来源：http://codepany.com/blog/swift-3-custom-uitextfield-with-single-line-input/|4574573|entityMap|0|LINK|mutability|MUTABLE|url|http://codepany.com/blog/swift-3-custom-uitextfield-with-single-line-input/^0|0|0|0|0|5|B|J|E|0|3|23|0|0^^$0|@$1|2|3|4|5|6|7|10|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|11|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|12|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|13|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|14|8|@$M|15|N|16|O|P]|$M|17|N|18|O|P]]|9|@]|A|$]]|$1|Q|3|R|5|6|7|19|8|@]|9|@$M|1A|N|1B|1|1C]]|A|$]]|$1|S|3|-4|5|6|7|1D|8|@]|9|@]|A|$]]]|T|$U|$5|V|W|X|A|$Y|Z]]]]

It is more about personalize your textField but anyways I'll share this code got from another page and made it a little better:

<pre><code>import UIKit
extension UITextField {
func setBottomLine(borderColor: UIColor, fontColor: UIColor, placeHolderColor:UIColor, placeHolder: String) {
 self.borderStyle = UITextBorderStyle.none
 self.backgroundColor = UIColor.clear
 let borderLine = UIView()
 let height = 1.0
 borderLine.frame = CGRect(x: 0, y: Double(self.frame.height) - height, width: Double(self.frame.width), height: height)
 self.textColor = fontColor
 borderLine.backgroundColor = borderColor
 self.addSubview(borderLine)
 self.attributedPlaceholder = NSAttributedString(
 string: placeHolder,
 attributes: [NSAttributedStringKey.foregroundColor: placeHolderColor]
 )
 }
}
</code></pre>

And you can use it like this:

<pre><code>self.textField.setBottomLine(borderColor: lineColor, fontColor: fontColor, placeHolderColor: placeHolderColor, placeHolder: placeHolder)
</code></pre>

Knowing that you have an <code>UITextField</code> connected to a <code>ViewController</code>.

Source: <a href="http://codepany.com/blog/swift-3-custom-uitextfield-with-single-line-input/" rel="nofollow noreferrer">http://codepany.com/blog/swift-3-custom-uitextfield-with-single-line-input/</a>

blocks|key|68110|text|以下是我对swift+4的快速实现：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|68111|extension+UITextField+{
++++func+placeholderColor(_+color:+UIColor){
++++++++var+placeholderText+=+""
++++++++if+self.placeholder+!=+nil{
++++++++++++placeholderText+=+self.placeholder!
++++++++}
++++++++self.attributedPlaceholder+=+NSAttributedString(string:+placeholderText,+attributes:+[NSAttributedStringKey.foregroundColor+:+color])
++++}
}|code-block|syntax|javascript|68112|像这样使用：|68113|streetTextField?.placeholderColor(AppColor.blueColor)|68114|希望它能帮助一些人！|68115|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

Here is my quick implementation for swift 4: 

<pre><code>extension UITextField {
 func placeholderColor(_ color: UIColor){
 var placeholderText = ""
 if self.placeholder != nil{
 placeholderText = self.placeholder!
 }
 self.attributedPlaceholder = NSAttributedString(string: placeholderText, attributes: [NSAttributedStringKey.foregroundColor : color])
 }
}
</code></pre>

use like:

<pre><code>streetTextField?.placeholderColor(AppColor.blueColor)
</code></pre>

hope it helps someone!

blocks|key|4574646|text|对于Swift+4|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4574647|txtField1.attributedPlaceholder+=+NSAttributedString(string:+"-",+attributes:+[NSAttributedStringKey.foregroundColor:+UIColor.white])|code-block|syntax|javascript|4574648|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

For Swift 4

<pre><code>txtField1.attributedPlaceholder = NSAttributedString(string: "-", attributes: [NSAttributedStringKey.foregroundColor: UIColor.white])
</code></pre>

blocks|key|4574681|text|对于swift+4.2及更高版本，您可以执行以下操作：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4574682|textField.attributedPlaceholder+=+NSAttributedString(string:+"Placeholder+Text",+attributes:+[NSAttributedString.Key.foregroundColor:+UIColor.white])|code-block|syntax|javascript|4574683|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

For swift 4.2 and above you can do it as below: 

<pre><code>textField.attributedPlaceholder = NSAttributedString(string: "Placeholder Text", attributes: [NSAttributedString.Key.foregroundColor: UIColor.white])
</code></pre>

blocks|key|4574694|text|在我的例子中，我做了以下工作：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4574695|extension+UITextField+{
++++@IBInspectable+var+placeHolderColor:+UIColor?+{
++++++++get+{
++++++++++++if+let+color+=+self.attributedPlaceholder?.attribute(.foregroundColor,+at:+0,+effectiveRange:+nil)+as?+UIColor+{
++++++++++++++++return+color
++++++++++++}
++++++++++++return+nil
++++++++}
++++++++set+(setOptionalColor)+{
++++++++++++if+let+setColor+=+setOptionalColor+{
++++++++++++++++let+string+=+self.placeholder+??+""
++++++++++++++++self.attributedPlaceholder+=+NSAttributedString(string:+string+,+attributes:[NSAttributedString.Key.foregroundColor:+setColor])
++++++++++++}
++++++++}
++++}
}|code-block|syntax|javascript|4574696|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

In my case, I have done following:

<pre><code>extension UITextField {
 @IBInspectable var placeHolderColor: UIColor? {
 get {
 if let color = self.attributedPlaceholder?.attribute(.foregroundColor, at: 0, effectiveRange: nil) as? UIColor {
 return color
 }
 return nil
 }
 set (setOptionalColor) {
 if let setColor = setOptionalColor {
 let string = self.placeholder ?? ""
 self.attributedPlaceholder = NSAttributedString(string: string , attributes:[NSAttributedString.Key.foregroundColor: setColor])
 }
 }
 }
}
</code></pre>

blocks|key|68269|text|Swift+4：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|68270|txtControl.attributedPlaceholder+=+NSAttributedString(string:+"Placeholder+String...",attributes:+[NSAttributedStringKey.foregroundColor:+UIColor.gray])|code-block|syntax|javascript|68271|Objective-C：|68272|UIColor+*color+=+[UIColor+grayColor];
txtControl.attributedPlaceholder+=+[[NSAttributedString+alloc]+initWithString:@"Placeholder+String..."+attributes:@{NSForegroundColorAttributeName:+color}];|68273|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Swift 4 :

<pre><code>txtControl.attributedPlaceholder = NSAttributedString(string: "Placeholder String...",attributes: [NSAttributedStringKey.foregroundColor: UIColor.gray])
</code></pre>

Objective-C :

<pre><code>UIColor *color = [UIColor grayColor];
txtControl.attributedPlaceholder = [[NSAttributedString alloc] initWithString:@"Placeholder String..." attributes:@{NSForegroundColorAttributeName: color}];
</code></pre>

blocks|key|68308|text|这是我写的所有UITextField的UIDesignable。在此代码的帮助下，您可以直接从故事板中的UI文件检查器访问它|type|unstyled|depth|inlineStyleRanges|entityRanges|data|68309|@IBDesignable
class+CustomTextField:+UITextField+{

@IBInspectable+var+leftImage:+UIImage?+{
++++didSet+{
++++++++updateView()
++++}
}

@IBInspectable+var+leftPadding:+CGFloat+=+0+{
++++didSet+{
++++++++updateView()
++++}
}

@IBInspectable+var+rightImage:+UIImage?+{
++++didSet+{
++++++++updateView()
++++}
}

@IBInspectable+var+rightPadding:+CGFloat+=+0+{
++++didSet+{
++++++++updateView()
++++}
}

private+var+_isRightViewVisible:+Bool+=+true
var+isRightViewVisible:+Bool+{
++++get+{
++++++++return+_isRightViewVisible
++++}
++++set+{
++++++++_isRightViewVisible+=+newValue
++++++++updateView()
++++}
}

func+updateView()+{
++++setLeftImage()
++++setRightImage()

++++//+Placeholder+text+color
++++attributedPlaceholder+=+NSAttributedString(string:+placeholder+!=+nil+?++placeholder!+:+"",+attributes:[NSAttributedString.Key.foregroundColor:+tintColor])
}

func+setLeftImage()+{
++++leftViewMode+=+UITextField.ViewMode.always
++++var+view:+UIView

++++if+let+image+=+leftImage+{
++++++++let+imageView+=+UIImageView(frame:+CGRect(x:+leftPadding,+y:+0,+width:+20,+height:+20))
++++++++imageView.image+=+image
++++++++//+Note:+In+order+for+your+image+to+use+the+tint+color,+you+have+to+select+the+image+in+the+Assets.xcassets+and+change+the+"Render+As"+property+to+"Template+Image".
++++++++imageView.tintColor+=+tintColor

++++++++var+width+=+imageView.frame.width+%2B+leftPadding

++++++++if+borderStyle+==+UITextField.BorderStyle.none+%7C%7C+borderStyle+==+UITextField.BorderStyle.line+{
++++++++++++width+%2B=+5
++++++++}

++++++++view+=+UIView(frame:+CGRect(x:+0,+y:+0,+width:+width,+height:+20))
++++++++view.addSubview(imageView)
++++}+else+{
++++++++view+=+UIView(frame:+CGRect(x:+0,+y:+0,+width:+leftPadding,+height:+20))
++++}

++++leftView+=+view
}

func+setRightImage()+{
++++rightViewMode+=+UITextField.ViewMode.always

++++var+view:+UIView

++++if+let+image+=+rightImage,+isRightViewVisible+{
++++++++let+imageView+=+UIImageView(frame:+CGRect(x:+0,+y:+0,+width:+20,+height:+20))
++++++++imageView.image+=+image
++++++++//+Note:+In+order+for+your+image+to+use+the+tint+color,+you+have+to+select+the+image+in+the+Assets.xcassets+and+change+the+"Render+As"+property+to+"Template+Image".
++++++++imageView.tintColor+=+tintColor

++++++++var+width+=+imageView.frame.width+%2B+rightPadding

++++++++if+borderStyle+==+UITextField.BorderStyle.none+%7C%7C+borderStyle+==+UITextField.BorderStyle.line+{
++++++++++++width+%2B=+5
++++++++}

++++++++view+=+UIView(frame:+CGRect(x:+0,+y:+0,+width:+width,+height:+20))
++++++++view.addSubview(imageView)

++++}+else+{
++++++++view+=+UIView(frame:+CGRect(x:+0,+y:+0,+width:+rightPadding,+height:+20))
++++}

++++rightView+=+view
}


@IBInspectable+public+var+borderColor:+UIColor+=+UIColor.clear+{
++++didSet+{
++++++++layer.borderColor+=+borderColor.cgColor
++++}
}

@IBInspectable+public+var+borderWidth:+CGFloat+=+0+{
++++didSet+{
++++++++layer.borderWidth+=+borderWidth
++++}
}

@IBInspectable+public+var+cornerRadius:+CGFloat+=+0+{
++++didSet+{
++++++++layer.cornerRadius+=+cornerRadius
++++}
}
@IBInspectable+public+var+bottomBorder:+CGFloat+=+0+{
++++didSet+{
+++++++borderStyle+=+.none
++++++++layer.backgroundColor+=+UIColor.white.cgColor

++++++++layer.masksToBounds+=+false
+++++//+++layer.shadowColor+=+UIColor.gray.cgColor
++++++++layer.shadowOffset+=+CGSize(width:+0.0,+height:+1.0)
++++++++layer.shadowOpacity+=+1.0
++++++++layer.shadowRadius+=+0.0
++++}
}
@IBInspectable+public+var+bottomBorderColor+:+UIColor+=+UIColor.clear+{
++++didSet+{

++++++++layer.shadowColor+=+bottomBorderColor.cgColor
++++++++layer.shadowOffset+=+CGSize(width:+0.0,+height:+1.0)
++++++++layer.shadowOpacity+=+1.0
++++++++layer.shadowRadius+=+0.0
++++}
}
///+Sets+the+placeholder+color
@IBInspectable+var+placeHolderColor:+UIColor?+{
++++get+{
++++++++return+self.placeHolderColor
++++}
++++set+{
++++++++self.attributedPlaceholder+=+NSAttributedString(string:self.placeholder+!=+nil+?+self.placeholder!+:+"",+attributes:[NSAttributedString.Key.foregroundColor:+newValue!])
++++}
}

}|code-block|syntax|javascript|68310|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Here am i writing all UIDesignable of UITextField. With the help of this code you can directly access it from UI file Inspector in storyboard

<pre><code>@IBDesignable
class CustomTextField: UITextField {

@IBInspectable var leftImage: UIImage? {
 didSet {
 updateView()
 }
}

@IBInspectable var leftPadding: CGFloat = 0 {
 didSet {
 updateView()
 }
}

@IBInspectable var rightImage: UIImage? {
 didSet {
 updateView()
 }
}

@IBInspectable var rightPadding: CGFloat = 0 {
 didSet {
 updateView()
 }
}

private var _isRightViewVisible: Bool = true
var isRightViewVisible: Bool {
 get {
 return _isRightViewVisible
 }
 set {
 _isRightViewVisible = newValue
 updateView()
 }
}

func updateView() {
 setLeftImage()
 setRightImage()

 // Placeholder text color
 attributedPlaceholder = NSAttributedString(string: placeholder != nil ? placeholder! : "", attributes:[NSAttributedString.Key.foregroundColor: tintColor])
}

func setLeftImage() {
 leftViewMode = UITextField.ViewMode.always
 var view: UIView

 if let image = leftImage {
 let imageView = UIImageView(frame: CGRect(x: leftPadding, y: 0, width: 20, height: 20))
 imageView.image = image
 // Note: In order for your image to use the tint color, you have to select the image in the Assets.xcassets and change the "Render As" property to "Template Image".
 imageView.tintColor = tintColor

 var width = imageView.frame.width + leftPadding

 if borderStyle == UITextField.BorderStyle.none || borderStyle == UITextField.BorderStyle.line {
 width += 5
 }

 view = UIView(frame: CGRect(x: 0, y: 0, width: width, height: 20))
 view.addSubview(imageView)
 } else {
 view = UIView(frame: CGRect(x: 0, y: 0, width: leftPadding, height: 20))
 }

 leftView = view
}

func setRightImage() {
 rightViewMode = UITextField.ViewMode.always

 var view: UIView

 if let image = rightImage, isRightViewVisible {
 let imageView = UIImageView(frame: CGRect(x: 0, y: 0, width: 20, height: 20))
 imageView.image = image
 // Note: In order for your image to use the tint color, you have to select the image in the Assets.xcassets and change the "Render As" property to "Template Image".
 imageView.tintColor = tintColor

 var width = imageView.frame.width + rightPadding

 if borderStyle == UITextField.BorderStyle.none || borderStyle == UITextField.BorderStyle.line {
 width += 5
 }

 view = UIView(frame: CGRect(x: 0, y: 0, width: width, height: 20))
 view.addSubview(imageView)

 } else {
 view = UIView(frame: CGRect(x: 0, y: 0, width: rightPadding, height: 20))
 }

 rightView = view
}


@IBInspectable public var borderColor: UIColor = UIColor.clear {
 didSet {
 layer.borderColor = borderColor.cgColor
 }
}

@IBInspectable public var borderWidth: CGFloat = 0 {
 didSet {
 layer.borderWidth = borderWidth
 }
}

@IBInspectable public var cornerRadius: CGFloat = 0 {
 didSet {
 layer.cornerRadius = cornerRadius
 }
}
@IBInspectable public var bottomBorder: CGFloat = 0 {
 didSet {
 borderStyle = .none
 layer.backgroundColor = UIColor.white.cgColor

 layer.masksToBounds = false
 // layer.shadowColor = UIColor.gray.cgColor
 layer.shadowOffset = CGSize(width: 0.0, height: 1.0)
 layer.shadowOpacity = 1.0
 layer.shadowRadius = 0.0
 }
}
@IBInspectable public var bottomBorderColor : UIColor = UIColor.clear {
 didSet {

 layer.shadowColor = bottomBorderColor.cgColor
 layer.shadowOffset = CGSize(width: 0.0, height: 1.0)
 layer.shadowOpacity = 1.0
 layer.shadowRadius = 0.0
 }
}
/// Sets the placeholder color
@IBInspectable var placeHolderColor: UIColor? {
 get {
 return self.placeHolderColor
 }
 set {
 self.attributedPlaceholder = NSAttributedString(string:self.placeholder != nil ? self.placeholder! : "", attributes:[NSAttributedString.Key.foregroundColor: newValue!])
 }
}

}
</code></pre>

blocks|key|4574845|text|目的C代码改变占位符文本颜色。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4574846|首先导入这个objc/运行时类-|4574847|​|4574848|#import+<objc/runtime.h>|code-block|syntax|javascript|4574849|4574850|然后替换您的文本字段名称-|4574851|Ivar+ivar+=++class_getInstanceVariable([UITextField+class],+"_placeholderLabel");
UILabel+*placeholderLabel+=+object_getIvar(YourTxtField,+ivar);
placeholderLabel.textColor+=+[UIColor+whiteColor];|4574852|4574853|entityMap^0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|U|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|V|8|@]|9|@]|A|$I|J]]|$1|K|3|E|5|6|7|W|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|X|8|@]|9|@]|A|$]]|$1|N|3|O|5|H|7|Y|8|@]|9|@]|A|$I|J]]|$1|P|3|E|5|6|7|Z|8|@]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|10|8|@]|9|@]|A|$]]]|R|$]]

Objective C code for changing placeholder text color.

First import this objc/runtime class -

<div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
<div class="snippet-code">
<pre class="snippet-code-html lang-html prettyprint-override"><code>#import &lt;objc/runtime.h&gt;</code></pre>
</div>
</div>


then replace your textfield name - 
<div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
<div class="snippet-code">
<pre class="snippet-code-html lang-html prettyprint-override"><code>Ivar ivar = class_getInstanceVariable([UITextField class], "_placeholderLabel");
UILabel *placeholderLabel = object_getIvar(YourTxtField, ivar);
placeholderLabel.textColor = [UIColor whiteColor];</code></pre>
</div>
</div>

blocks|key|68369|text|对于iOS13|type|unstyled|depth|inlineStyleRanges|entityRanges|data|68370|%2B(void)ChangeplaceholderColor+:(UITextField+*)TxtFld+andColor:(UIColor*)color+{+
++++NSMutableAttributedString+*placeholderAttributedString+=+[[NSMutableAttributedString+alloc]+initWithAttributedString:TxtFld.attributedPlaceholder];
+++++++[placeholderAttributedString+addAttribute:NSForegroundColorAttributeName+value:color+range:NSMakeRange(0,+[placeholderAttributedString+length])];
+++++++TxtFld.attributedPlaceholder+=+placeholderAttributedString;

}|code-block|syntax|javascript|68371|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

for iOS13 

<pre><code>+(void)ChangeplaceholderColor :(UITextField *)TxtFld andColor:(UIColor*)color { 
 NSMutableAttributedString *placeholderAttributedString = [[NSMutableAttributedString alloc] initWithAttributedString:TxtFld.attributedPlaceholder];
 [placeholderAttributedString addAttribute:NSForegroundColorAttributeName value:color range:NSMakeRange(0, [placeholderAttributedString length])];
 TxtFld.attributedPlaceholder = placeholderAttributedString;

}
</code></pre>

blocks|key|68404|text|在Swift中像这样使用，|type|unstyled|depth|inlineStyleRanges|entityRanges|data|68405|+let+placeHolderText+=+textField.placeholder+??+""
+let+str+=+NSAttributedString(string:placeHolderText!,+attributes:+[NSAttributedString.Key.foregroundColor+:UIColor.lightGray])
+textField.attributedPlaceholder+=+str|code-block|syntax|javascript|68406|在目标C中|68407|NSString+*placeHolder+=+[textField.placeholder+length]>0+?+textField.placeholder:+@"";
NSAttributedString+*str+=+[[NSAttributedString+alloc]+initWithString:placeHolder+attributes:@{+NSForegroundColorAttributeName+:+[UIColor+lightGrayColor]+}];
textField.attributedPlaceholder+=+str;|68408|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Use like this in Swift,

<pre><code> let placeHolderText = textField.placeholder ?? ""
 let str = NSAttributedString(string:placeHolderText!, attributes: [NSAttributedString.Key.foregroundColor :UIColor.lightGray])
 textField.attributedPlaceholder = str
</code></pre>

In Objective C

<pre><code>NSString *placeHolder = [textField.placeholder length]&gt;0 ? textField.placeholder: @"";
NSAttributedString *str = [[NSAttributedString alloc] initWithString:placeHolder attributes:@{ NSForegroundColorAttributeName : [UIColor lightGrayColor] }];
textField.attributedPlaceholder = str;
</code></pre>

blocks|key|4574905|text|++++extension+UITextField{
++++++++++++@IBInspectable+var+placeHolderColor:+UIColor?+{
++++++++++++++++get+{
++++++++++++++++++++return+self.placeHolderColor
++++++++++++++++}
++++++++++++++++set+{
++++++++++++++++++++self.attributedPlaceholder+=+NSAttributedString(string:self.placeholder+!=+nil+?
++++++++self.placeholder!+:+"",
++++++++attributes:[NSAttributedString.Key.foregroundColor+:+newValue!])
++++++++++++++++}
++++++++++++}+
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|4574906|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code> extension UITextField{
 @IBInspectable var placeHolderColor: UIColor? {
 get {
 return self.placeHolderColor
 }
 set {
 self.attributedPlaceholder = NSAttributedString(string:self.placeholder != nil ?
 self.placeholder! : &quot;&quot;,
 attributes:[NSAttributedString.Key.foregroundColor : newValue!])
 }
 } 
}
</code></pre>

I have a design that implements a dark blue <code>UITextField</code>, as the placeholder text is by default a dark grey colour I can barely make out what the place holder text says.

I've googled the problem of course but I have yet to come up with a solution while using the Swift language and not Obj-c.

Is there a way to change the placeholder text colour in a <code>UITextField</code> using Swift?

Changing Placeholder Text Color with Swift

Objective-C

Swift

我有一个实现了深蓝色UITextField的设计，因为占位符文本默认是深灰色的，我几乎不能理解占位符文本所说的内容。当然，我已经用谷歌搜索了这个问题，但在使用Swift语言而不是Obj-c时，我还没有想出解决方案。有没有办法使用Swift更改UITextField中的占位符文本颜色？

问使用Swift更改占位符文本颜色
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