ios 快速正确地继承 UITextField
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Properly Subclassing UITextField in swift
提问by nikagar4
So i have these textfields that i realised that they all have same properties, so i created new class called "UserInputs" and extended from UITextField, everything works properly except one thing, UITextFieldDelegatefunctions doesn't work, i mean when i focus on them it doesn't work, i want to add it in code because when you focus on my input fields they change border, how do i properly subclass from UITextField
所以我有这些文本字段，我意识到它们都具有相同的属性，所以我创建了一个名为“ UserInputs”的新类并从中扩展UITextField，除了一件事外，一切正常，UITextFieldDelegate函数不起作用，我的意思是当我专注于它们时它不会不工作，我想在代码中添加它，因为当你关注我的输入字段时，它们会改变边框，我如何正确地从UITextField
the only problems that i have are that functions:
我唯一的问题是功能：
textFieldDidBeginEditing
textFieldDidEndEditing
and so doesn't work.
所以不起作用。
this is my classwhere everything happens:
这是我的课堂，一切都会发生：
import Foundation
import UIKit
class RegistrationViewController: UIViewController, UITextFieldDelegate {
@IBOutlet weak var firstName: UserInputs!
@IBOutlet weak var test: UserInputs!
override func viewDidLoad() {
super.viewDidLoad()
self.firstName.delegate = self
self.test.delegate = self
}
}
This is my subclass:
这是我的子类：
class UserInputs: UITextField{
required init(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)!
createBorder()
}
func createBorder(){
let border = CALayer()
let width = CGFloat(2.0)
border.borderColor = UIColor(red: 55/255, green: 78/255, blue: 95/255, alpha: 1.0).CGColor
border.frame = CGRect(x: 0, y: self.frame.size.height-width, width: self.frame.size.width, height: self.frame.size.height)
border.borderWidth = width
self.layer.addSublayer(border)
self.layer.masksToBounds = true
//print("border created")
}
func textFieldDidBeginEditing() {
print("focused")
self.pulseBorderColor()
}
func textFieldDidEndEditing() {
print("lost focus")
self.reversePulseBorderColor()
}
func pulseBorderColor(){
let pulseAnimation = CABasicAnimation(keyPath: "borderColor")
pulseAnimation.duration = 0.35
pulseAnimation.fromValue = UIColor(red: 55/255, green: 78/255, blue: 95/255, alpha: 1.0).CGColor
pulseAnimation.toValue = UIColor(red: 252/255, green: 180/255, blue: 29/255, alpha: 1.0).CGColor
pulseAnimation.fillMode = kCAFillModeForwards
pulseAnimation.removedOnCompletion = false
pulseAnimation.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseInEaseOut)
self.layer.sublayers![0].addAnimation(pulseAnimation,forKey: nil)
}
func reversePulseBorderColor(){
let pulseAnimation = CABasicAnimation(keyPath: "borderColor")
pulseAnimation.duration = 0.35
pulseAnimation.fromValue = UIColor(red: 252/255, green: 180/255, blue: 29/255, alpha: 1.0).CGColor
pulseAnimation.toValue = UIColor(red: 55/255, green: 78/255, blue: 95/255, alpha: 1.0).CGColor
pulseAnimation.fillMode = kCAFillModeForwards
pulseAnimation.removedOnCompletion = false
pulseAnimation.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseInEaseOut)
self.layer.sublayers![0].addAnimation(pulseAnimation,forKey: nil)
}
}
this code worked when i had no subclass and was doing it inside my main class, but after creating subclass focus functions stopped working, everything else works
当我没有子类并且在我的主类中执行此代码时，此代码有效，但是在创建子类焦点函数后停止工作，其他一切正常
main problem is that i want to implement
主要问题是我想实施
func textFieldDidBeginEditing() {
print("focused")
}
func textFieldDidEndEditing() {
print("lost focus")
}
these in my textfields so i don't write it over and over again
这些在我的文本字段中，所以我不会一遍又一遍地写
回答by Gaston Gonzalez
Your UITextFieldDelegate should probably stay in your RegistrationViewController.
您的 UITextFieldDelegate 应该留在您的 RegistrationViewController 中。
Instead of overriding the delegate you can do this. In your init method, add a target to self with the appropriate function.
您可以这样做，而不是覆盖委托。在您的 init 方法中，使用适当的函数向 self 添加一个目标。
class UserInputs: UITextField {
override init(frame: CGRect) {
super.init(frame: frame)
self.addTarget(self, action: "formatText", for: .editingChanged)
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
self.addTarget(self, action: "formatText", for: .editingChanged)
}
func formatText() {
// Edit self.text here
}
//.......//
}
回答by Jason Barker
It looks like the UITextFieldDelegatefunctions you have in your code are a little off. They should be:
看起来UITextFieldDelegate您在代码中的功能有点偏离。他们应该是：
func textFieldDidBeginEditing(textField: UITextField) {
print("focused")
}
func textFieldDidEndEditing(textField: UITextField) {
print("lost focus")
}
And since you want the UserInputsobjects to be their own delegates, I've added that code, too. To demonstrate this, I have the following two files:
由于您希望UserInputs对象成为它们自己的委托，因此我也添加了该代码。为了证明这一点，我有以下两个文件：
ViewController.swift
视图控制器.swift
import UIKit
class ViewController: UIViewController, UITextFieldDelegate {
var textField: UserInputs!
override func viewDidLoad() {
super.viewDidLoad()
textField = UserInputs(frame: CGRectMake(100, 100, 200, 40))
view.addSubview(textField!)
}
}
UserInputs.swift
用户输入.swift
import UIKit
class UserInputs: UITextField, UITextFieldDelegate {
required init(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)!
delegate = self
createBorder()
}
required override init(frame: CGRect) {
super.init(frame: frame)
delegate = self
createBorder()
}
func createBorder(){
let border = CALayer()
let width = CGFloat(2.0)
border.borderColor = UIColor(red: 55/255, green: 78/255, blue: 95/255, alpha: 1.0).CGColor
border.frame = CGRect(x: 0, y: self.frame.size.height-width, width: self.frame.size.width, height: self.frame.size.height)
border.borderWidth = width
self.layer.addSublayer(border)
self.layer.masksToBounds = true
//print("border created")
}
func textFieldDidBeginEditing(textField: UITextField) {
print("focused")
}
func textFieldDidEndEditing(textField: UITextField) {
print("lost focus")
}
}
回答by Hamza Ansari
You can change border by calling delegate in UserInput
您可以通过在 UserInput 中调用委托来更改边框
class UserInputs: UITextField, UITextFieldDelegate{
let border = CALayer()
required init(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)!
createBorder()
self.delegate = self
}
func createBorder(){
let width = CGFloat(2.0)
border.borderColor = UIColor(red: 55/255, green: 78/255, blue: 95/255, alpha: 1.0).CGColor
border.frame = CGRect(x: 0, y: self.frame.size.height-width, width: self.frame.size.width, height: self.frame.size.height)
border.borderWidth = width
self.layer.addSublayer(border)
self.layer.masksToBounds = true
//print("border created")
}
func pulseBorderColor(){
border.borderColor = UIColor.greenColor().CGColor
}
func normalColor(){
border.borderColor = UIColor(red: 55/255, green: 78/255, blue: 95/255, alpha: 1.0).CGColor
}
func textFieldDidBeginEditing(textField: UITextField) {
print("focused")
pulseBorderColor()
}
func textFieldDidEndEditing(textField: UITextField) {
print("lost focus")
normalColor()
}
}
