更改自定义文本字段背景颜色和文本颜色 IOS Swift
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Change custom text field background color and text color IOS Swift
提问by Arvin Jayanake
I'm using following custom text field class to change appearance of the text field. Now I need to change text field's background color, text color and place holder color, when user start editing and end editing the text field. How to do it, using this class.
我正在使用以下自定义文本字段类来更改文本字段的外观。现在我需要在用户开始编辑和结束编辑文本字段时更改文本字段的背景颜色、文本颜色和占位符颜色。怎么做，使用这个类。
import Foundation
import UIKit
class CustomTextField: UITextField{
required init(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
//Border
self.layer.cornerRadius = 15.0;
self.layer.borderWidth = 1.5
self.layer.borderColor = UIColor.whiteColor().CGColor
//Background
self.backgroundColor = UIColor(white: 1, alpha: 0.0)
//Text
self.textColor = UIColor.whiteColor()
self.textAlignment = NSTextAlignment.Center
}
}
采纳答案by Yaser
Add self as a target for the UIControl events you need according to documentation
根据文档将 self 添加为您需要的 UIControl 事件的目标
There you have control events for EditingDidBegin and such.
在那里你有 EditingDidBegin 等的控制事件。
Something like this:
像这样的东西：
self.addTarget(self, action: "myFunc", forControlEvents: UIControlEvents.EditingDidBegin);
回答by Eendje
In your CustomTextFieldclass you can add a property observer:
在您的CustomTextField课程中，您可以添加一个属性观察者：
var change: Bool = false {
didSet {
textColor = change ? .yellow : .black
backgroundColor = change ? .blue : .white
}
}
and in your ViewController:
并在您的 ViewController 中：
func textFieldDidBeginEditing(textField: UITextField) {
customTextField.change = true
}
func textFieldDidEndEditing(textField: UITextField) {
customTextField.change = false
}
Don't forget to set the delegate of your textfield, in storyboard or programmatically.
不要忘记在故事板中或以编程方式设置文本字段的委托。
EDIT:
Shortened the code and updated for Swift 3
编辑：
缩短代码并更新 Swift 3
回答by HafizAnser
Select the text field -> click "identity inspector" icon -> click on Plus button "user Defined runtime attributes" -> add this text "_placeholderLabel.textColor" in "key path" field -> choose the "Type" "color" and set the value color.
选择文本字段-> 单击“身份检查器”图标-> 单击加号按钮“用户定义的运行时属性”-> 在“关键路径”字段中添加此文本“_placeholderLabel.textColor”-> 选择“类型”“颜色”并设置值颜色。
