Question

我有一个MainView，当按下注册按钮时会添加一个子视图（signUpWindow）。

在我的signUpWindow子视图（SignUpWindowView.swift）中，我使用函数设置每个字段，例如：

func confirmPasswordText()
    {
        confirmPasswordTextField.frame=CGRectMake(50, 210, 410, 50)
        confirmPasswordTextField.placeholder=("Confirm Password")
        confirmPasswordTextField.textColor=textFieldFontColor
        confirmPasswordTextField.secureTextEntry=true
        confirmPasswordTextField.returnKeyType = .Next
        confirmPasswordTextField.clearButtonMode = .WhileEditing
        confirmPasswordTextField.tag=5
        self.addSubview(confirmPasswordTextField)
    }

我让键盘在出现时上下移动signUpWindow并在MainView中消失。

SignUpWindowView实现UITextFieldDelegate

我的问题是我正在尝试配置键盘上的“下一个/完成”按钮，并且不确定要添加MainView功能的视图（SignUpWindowView或textFieldShouldReturn）。我已经尝试了两种方法，但是甚至无法触发println来测试该函数是否被执行。一旦我开始textFieldShouldReturn，我相信我可以执行必要的代码以使Next / Done按钮完成我想要的操作，并将发布最终解决方案以包含Next / Done功能。

更新为包含SignUpWindowView.swift的缩写版本

import UIKit

class SignUpWindowView: UIView,UITextFieldDelegate {

let firstNameTextField:UITextField=UITextField()
let lastNameTextField:UITextField=UITextField()

override func drawRect(rect: CGRect){
    func firstNameText(){
        firstNameTextField.delegate=self
        firstNameTextField.frame=CGRectMake(50, 25, 200, 50)
        firstNameTextField.placeholder="First Name"
        firstNameTextField.returnKeyType = .Next
        self.addSubview(firstNameTextField)
     }

    func lastNameText(){
        lastNameTextField.delegate=self
        lastNameTextField.frame=CGRectMake(260, 25, 200, 50)
        lastNameTextField.placeholder="Last Name"
        lastNameTextField.returnKeyType = .Done
        self.addSubview(lastNameTextField)
     }

    func textFieldShouldReturn(textField: UITextField!) -> Bool{
        println("next button should work")
        if (textField === firstNameTextField)
        {
            firstNameTextField.resignFirstResponder()
            lastNameTextField.becomeFirstResponder()
        }
        return true
     }

    firstNameText()
    lastNameText()
}

Answer 1

您需要在班级中实施UITextFieldDelegate并将该对象设置为UITextField的委托。然后像这样实现方法textFieldShouldReturn:：

func textFieldShouldReturn(textField: UITextField) -> Bool {
    textField.resignFirstResponder()
    if textField == someTextField { // Switch focus to other text field
        otherTextField.becomeFirstResponder()
    }
    return true
}

在你的例子中，你错过了这一行：

confirmPasswordTextField.delegate = self

如果您已经实施了委托。

Answer 2

我试图在SignUpWindowView.swift中测试我的文本字段，这是创建所有textField的地方。但是，因为我将SignUpWindowView作为子视图放入我的MainViewController，所有我的UITextField＆＃34;处理＆＃34;需要在MainView而不是它的子视图中完成。

所以这是我的整个代码（目前）是我的MainViewController，当键盘显示/隐藏然后从一个字段移动到下一个字段时，它处理向上/向下移动我的SignUpWindowView。当用户位于最后一个文本字段（其键盘的“下一步”按钮现在在子视图中设置为“完成”）时，键盘就会丢失，然后用户可以使用注册按钮提交表单。

MainViewController：

import UIKit

@objc protocol ViewControllerDelegate
{
    func keyboardWillShowWithSize(size:CGSize, andDuration duration:NSTimeInterval)
    func keyboardWillHideWithSize(size:CGSize,andDuration duration:NSTimeInterval)
}

class ViewController: UIViewController,UITextFieldDelegate
{
    var keyboardDelegate:ViewControllerDelegate?

    let signUpWindow=SignUpWindowView()
    let signUpWindowPosition:CGPoint=CGPointMake(505, 285)

    override func viewDidLoad()
    {
        super.viewDidLoad()

        // Keyboard Notifications
        NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardWillShow:", name: UIKeyboardWillShowNotification, object: nil)
        NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardWillHide:", name: UIKeyboardWillHideNotification, object: nil)

        // set the textFieldDelegates
        signUpWindow.firstNameTextField.delegate=self
        signUpWindow.lastNameTextField.delegate=self
        signUpWindow.userNameTextField.delegate=self
        signUpWindow.passwordTextField.delegate=self
        signUpWindow.confirmPasswordTextField.delegate=self
        signUpWindow.emailTextField.delegate=self
    }


    func keyboardWillShow(notification: NSNotification)
    {
        var info:NSDictionary = notification.userInfo!
        let keyboardFrame = info[UIKeyboardFrameEndUserInfoKey] as! NSValue
        let keyboardSize = keyboardFrame.CGRectValue().size

        var keyboardHeight:CGFloat = keyboardSize.height

        let animationDurationValue = info[UIKeyboardAnimationDurationUserInfoKey] as! NSNumber

        var animationDuration : NSTimeInterval = animationDurationValue.doubleValue

        self.keyboardDelegate?.keyboardWillShowWithSize(keyboardSize, andDuration: animationDuration)

        // push up the signUpWindow
        UIView.animateWithDuration(animationDuration, delay: 0.25, options: UIViewAnimationOptions.CurveEaseInOut, animations: {
            self.signUpWindow.frame = CGRectMake(self.signUpWindowPosition.x, (self.signUpWindowPosition.y - keyboardHeight+140), self.signUpWindow.bounds.width, self.signUpWindow.bounds.height)
            }, completion: nil)
    }

    func keyboardWillHide(notification: NSNotification)
    {
        var info:NSDictionary = notification.userInfo!

        let keyboardFrame = info[UIKeyboardFrameEndUserInfoKey] as! NSValue
        let keyboardSize = keyboardFrame.CGRectValue().size

        var keyboardHeight:CGFloat = keyboardSize.height

        let animationDurationValue = info[UIKeyboardAnimationDurationUserInfoKey] as! NSNumber

        var animationDuration : NSTimeInterval = animationDurationValue.doubleValue

        self.keyboardDelegate?.keyboardWillHideWithSize(keyboardSize, andDuration: animationDuration)

        // pull signUpWindow back to its original position
        UIView.animateWithDuration(animationDuration, delay: 0.25, options: UIViewAnimationOptions.CurveEaseInOut, animations: {
            self.signUpWindow.frame = CGRectMake(self.signUpWindowPosition.x, self.signUpWindowPosition.y, self.signUpWindow.bounds.width, self.signUpWindow.bounds.height)
            }, completion: nil)
    }

    func textFieldShouldReturn(textField: UITextField) -> Bool
    {
        switch textField
        {
        case signUpWindow.firstNameTextField:
            signUpWindow.lastNameTextField.becomeFirstResponder()
            break
        case signUpWindow.lastNameTextField:
            signUpWindow.userNameTextField.becomeFirstResponder()
            break
        case signUpWindow.userNameTextField:
            signUpWindow.passwordTextField.becomeFirstResponder()
            break
        case signUpWindow.passwordTextField:
            signUpWindow.confirmPasswordTextField.becomeFirstResponder()
            break
        case signUpWindow.confirmPasswordTextField:
            signUpWindow.emailTextField.becomeFirstResponder()
            break
        default:
            textField.resignFirstResponder()
        }
        return true
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    override func viewWillDisappear(animated: Bool) {
        NSNotificationCenter.defaultCenter().removeObserver(self, name: UIKeyboardWillShowNotification, object: nil)
        NSNotificationCenter.defaultCenter().removeObserver(self, name: UIKeyboardWillHideNotification, object: nil)
    }

    @IBAction func signup()
    {
        signUpWindow.frame=CGRectMake(signUpWindowPosition.x, signUpWindowPosition.y, 485,450)
        signUpWindow.backgroundColor=UIColor.clearColor()

        self.view.addSubview(signUpWindow)
    }
}

Answer 3

使用标签可以更轻松。将标签按升序分配给您在屏幕上使用的所有文本字段。

func textFieldShouldReturn(_ textField: UITextField) -> Bool {

    let textTag = textField.tag+1
    let nextResponder = textField.superview?.viewWithTag(textTag) as UIResponder!
    if(nextResponder != nil)
    {
        //textField.resignFirstResponder()
        nextResponder?.becomeFirstResponder()
    }
    else{
        // stop editing on pressing the done button on the last text field.

        self.view.endEditing(true)
    }
    return true
}

Answer 4

你连接了DidEndOnExit（我在内存中写了这个，所以也许它没有被称为完全相似但是类似的）UIControl事件使用@IBAction并且在那个func中你使用{{1} }或textF.resignFirstResponder()

修改

UITextField是UIControl的子类，并以编程方式添加使用addTarget（）方法的新事件。例如：

.becomeFirstResponder()

UIControl docs

使用Swift和textFieldShouldReturn

4 个答案:

修改