ios 如何使用 swift 2.0 更改 UITextfield 占位符颜色和字体大小？

How to change UITextfield placeholder color and fontsize using swift 2.0?

提问by Xcode

How to change UITextfieldplaceholder& fontsizein SWIFT 2.0?

如何在 SWIFT 2.0 中更改UITextfieldplaceholder& fontsize？

回答by Kirit Modi

#1. set Placeholder textfield color Programmatically

#1. 以编程方式设置占位符文本字段颜色

    var myMutableStringTitle = NSMutableAttributedString()
    let Name  = "Enter Title" // PlaceHolderText

    myMutableStringTitle = NSMutableAttributedString(string:Name, attributes: [NSFontAttributeName:UIFont(name: "Georgia", size: 20.0)!]) // Font
    myMutableStringTitle.addAttribute(NSForegroundColorAttributeName, value: UIColor.redColor(), range:NSRange(location:0,length:Name.characters.count))    // Color
    txtTitle.attributedPlaceholder = myMutableStringTitle

OR

或者

txtTitle.attributedPlaceholder = NSAttributedString(string:"Enter Title", attributes: [NSForegroundColorAttributeName: yellowColor])

Note : Nameis your placeholder of textField.

注意：Name是您的textField.

PlaceHolder TextFiled :

占位符文本文件：

-------------------------------- OR -------------------------------------

- - - - - - - - - - - - - - - - 或者 - - - - - - - - - --------------------

#2. set Placeholder textfield color at runtime attribute

#2. 在运行时属性设置占位符文本字段颜色

1. Set textfield placeHolder text Enter Title

   

2. Click on identity inspector of textfield property.

   

3. User Define Runtime Attributes, add color attributes

   Key Path : _placeholderLabel.textColor

   Type : Color

   value : Your Color or RGB value

   

   PlaceHolder TextFiled :

   

1. 设置文本字段 placeHolder 文本 Enter Title

   

2. 单击文本字段属性的身份检查器。

   

3. 用户定义运行时属性，添加颜色属性

   关键路径： _placeholderLabel.textColor

   类型 ： Color

   价值 ： Your Color or RGB value

   

   占位符文本文件：

   

回答by Kiran jadhav

Updated for Swift 3

为 Swift 3 更新

If you want to change the UITextField Placeholder color for Swift 3, use the following lines of code:

如果要更改 Swift 3 的 UITextField 占位符颜色，请使用以下代码行：

let yourTextFieldName = UITextField(frame: CGRect(x: 0, y: 0, width: 180, height: 21))
yourTextFieldName.attributedPlaceholder = NSAttributedString(string: "placeholder text", attributes: [NSForegroundColorAttributeName: UIColor.white])

回答by Serguei Vinnitskii

For swift 4 instead of

对于 swift 4 而不是

NSForegroundColorAttributeName

NSForegroundColorAttributeName

use

用

NSAttributedStringKey.foregroundColor

NSAttributedStringKey.foregroundColor

回答by Jin

For swift 5.0 use NSAttributedString.Key.foregroundColorinstead of NSForegroundColorAttributeName

对于 swift 5.0 使用NSAttributedString.Key.foregroundColor而不是NSForegroundColorAttributeName

So, do it like so

所以，这样做

textField.attributedPlaceholder = NSAttributedString(string: "placeholder text", attributes: [NSAttributedString.Key.foregroundColor: UIColor.white])

回答by Jamil

You can try with this sample code

您可以尝试使用此示例代码

let  textFld = UITextField();
textFld.frame = CGRectMake(0,0, 200, 30)
textFld.center = self.view.center;
textFld.attributedPlaceholder = NSAttributedString(string:"Test Data for place holder", attributes:[NSForegroundColorAttributeName: UIColor.blueColor(),NSFontAttributeName :UIFont(name: "Arial", size: 10)!])
self.view.addSubview(textFld)

回答by Dharmesh Mansata

Placeholder for textfield Objective C

文本字段目标 C 的占位符

NSString* str = @"Placeholder text...";                                    
NSRange range1 = [str rangeOfString:@"Placeholder text..."];


NSMutableAttributedString *attributedText = [[NSMutableAttributedString alloc] initWithString:str];
[attributedText setAttributes:@{
                                NSFontAttributeName:[UIFont fontWithName:customFont_NotoSans_Regular size:13.0]
                                }
                        range:range1];

[attributedText addAttribute:NSForegroundColorAttributeName value:[UIColor whiteColor] range:range1];

txtFld.font = [UIFont fontWithName:customFont_NotoSans_Regular size:13.0];
txtFld.keyboardType = UIKeyboardTypeDefault;
txtFld.attributedPlaceholder = attributedText;

回答by Demosthese

It's easy to do with a subclass of UITextField.

使用 UITextField 的子类很容易做到。

Add placeholderColorproperty to easily set the color, and then observer changing of .placeholderto apply the color to it (with use of .attributedPlaceholderproperty)

添加placeholderColor属性以轻松设置颜色，然后观察者更改以.placeholder对其应用颜色（使用.attributedPlaceholder属性）

var placeholderColor: UIColor = .lightGray

override var placeholder: String? {
    didSet {
        let attributes = [ NSAttributedString.Key.foregroundColor: placeholderColor ]
        attributedPlaceholder = NSAttributedString(string: placeholder ?? "", attributes: attributes)
    }
}

You do need to set the placeholder text programatically for the color to apply.

您确实需要以编程方式设置占位符文本以应用颜色。

回答by huync

A simple solution is override placeholderproperty in an UITextFieldextension. It will update color of placeholder whole project. You don't need to update your code in many places.

一个简单的解决方案是placeholder在UITextField扩展中覆盖属性。它将更新占位符整个项目的颜色。您无需在许多地方更新您的代码。

extension UITextField {
  var placeholder: String? {
      get {
          attributedPlaceholder?.string
      }

      set {
          guard let newValue = newValue else {
              attributedPlaceholder = nil
              return
          }

          let attributes: [NSAttributedString.Key: Any] = [.foregroundColor: Color.textFieldPlaceholder.color]

          let attributedText = NSAttributedString(string: newValue, attributes: attributes)

          attributedPlaceholder = attributedText
      }
  }
}

回答by CSE 1994

set Textfield placeholder

设置文本字段占位符

let leftBarButtonItem = UIBarButtonItem.init(image: UIImage(named:"ic_nav-bar_back.png"), landscapeImagePhone: nil, style: .plain, target: viewController, action: #selector(viewController.buttonClick(_:)))
        leftBarButtonItem.imageInsets = UIEdgeInsets(top: 0, left: -15, bottom: 0, right: 0)
        leftBarButtonItem.tintColor = UIColor(hex: 0xED6E19)
        viewController.navigationItem.setLeftBarButton(leftBarButtonItem, animated: true)