Ios 点击UITextField不工作

我读了很多书，试图找到一种处理uitextfield单击的方法，但对我来说没有任何效果

我想要的是：

我想在UITextField上添加点击并打开对话框

我尝试的是：

class CreateMessagesViewController: UIViewController {

    @IBOutlet weak var testField: UITextField!
    @IBOutlet weak var testView: UIView!

    override func viewDidLoad() {
        super.viewDidLoad()

        let tap = UITapGestureRecognizer(target: self, action: #selector(self.handleTap(_:)))
//        testField.addGestureRecognizer(tap)
        testView.addGestureRecognizer(tap)

        testField.addTarget(self, action: #selector(onTapped(_:)), for: .touchDown)
    }

    func onTapped(_ sender : UITextField){

        print("Hello World")
    }

    func handleTap(_ sender: UITapGestureRecognizer) {
        print("Hello World")
    }
}

如您所见，我尝试了两种方法：

UITAPPgestureRecognitor

选择器

为了进行测试，我添加了简单的UIView，以确保tap正常工作，并且正常工作

---

为什么它在uiTextField上不起作用？我错过了什么吗？

不可能。因为Textfield委托方法调用

将手势识别器添加到

UITextField

superview，并检查是否有帮助：

testField.superview.addGestureRecognizer(tap)

---

您可以在中编写打开对话框的代码，而不是添加手势识别器

func textFieldShouldBeginEditing(_ textField: UITextField) -> Bool{
    openDialog()//Function which will open the dialog
    return false
}

---

我认为它应该具有与您想要的相同的效果。

我为您的问题创建了一个示例，包括Swift和Objective C，但它不起作用。我使用了文本字段的点击手势识别器代码，但它甚至没有调用

未在Swift和Objective C中的代码下工作

Swift

let tap = UITapGestureRecognizer(target: self,action: #selector(handleTaponTextField(_:)))
tap.numberOfTapsRequired = 1
tap.delegate = self
txtFldTapMe.isUserInteractionEnabled = true
txtFldTapMe.addGestureRecognizer(tap)

func handleTaponTextField(_ sender: UITapGestureRecognizer)
{
    print("Tap is handled here!")
}

txtFldTapMe.addTarget(self, action: #selector(textFieldEditDidBegin(_:)), for: .editingDidBegin)

func textFieldEditDidBegin(_ textField: UITextField) {
    print("Text editing begin here!")
}

目标C

UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleTap:)];
tapGesture.numberOfTapsRequired = 1;
tapGesture.delegate = self;
txtfldTapME.userInteractionEnabled = YES;
[txtfldTapME addGestureRecognizer:tapGesture];

func handleTaponTextField(_ sender: UITapGestureRecognizer)
{
    print("Tap is handled here!")
}

[txtfldTapME addTarget:self action:@selector(editingDidBeginStarted:) forControlEvents: UIControlEventEditingDidBegin];   

-(void)editingDidBeginStarted:(UITapGestureRecognizer *)sender{
  NSLog(@"Editing started here");
}

然后我尝试了textField下面的addTarget操作方法，效果很好

在Swift和Objective C代码下工作

Swift

let tap = UITapGestureRecognizer(target: self,action: #selector(handleTaponTextField(_:)))
tap.numberOfTapsRequired = 1
tap.delegate = self
txtFldTapMe.isUserInteractionEnabled = true
txtFldTapMe.addGestureRecognizer(tap)

func handleTaponTextField(_ sender: UITapGestureRecognizer)
{
    print("Tap is handled here!")
}

txtFldTapMe.addTarget(self, action: #selector(textFieldEditDidBegin(_:)), for: .editingDidBegin)

func textFieldEditDidBegin(_ textField: UITextField) {
    print("Text editing begin here!")
}

参见方法

您应该使用上述textField方法

目标C

UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleTap:)];
tapGesture.numberOfTapsRequired = 1;
tapGesture.delegate = self;
txtfldTapME.userInteractionEnabled = YES;
[txtfldTapME addGestureRecognizer:tapGesture];

func handleTaponTextField(_ sender: UITapGestureRecognizer)
{
    print("Tap is handled here!")
}

[txtfldTapME addTarget:self action:@selector(editingDidBeginStarted:) forControlEvents: UIControlEventEditingDidBegin];   

-(void)editingDidBeginStarted:(UITapGestureRecognizer *)sender{
  NSLog(@"Editing started here");
}

请参阅下面的textField方法

1）添加手势识别器：

let tapGR = UITapGestureRecognizer(target: self, action: #selector(someFunc))
tapGR.delegate = self
textField.addGestureRecognizer(tapGR)

2） 确保在必要时允许您的点击处理程序：

func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWith otherGestureRecognizer: UIGestureRecognizer) -> Bool {
    return true //or add your custom check here if you need
}

---

如果没有第二部分，你会得到一个错误的

textField

，有时候点击手势不起作用，有时候默认手势不被处理

有一种更简单的方法来实现这一点。您应该将视图控制器类确认为

UITextFieldDelegate

，并在类中实现

textfieldDiBeginediting

func textFieldDidBeginEditing(_ textField: UITextField){
       //show popup here
}

如果有多个文本字段，请在情节提要（或代码）中为文本字段指定一个标记以识别文本字段

 func textFieldDidBeginEditing(_ textField: UITextField){

// check your tag here
   if textField.tag == 0{

            //show your popup here
        }

}

试试下面的代码

yourTextField.addTarget(self, action: #selector(didChangeText), for: .editingChanged)
    addSubview(view)

@objc func didChangeText(textField:UITextField) {
    let str = textField.text
        //your functionality here
}

---

可能重复的可能重复的尝试禁用文本字段的选择。或者在不使用手势的情况下，apple将提供didBeginEditing委托方法。为什么不使用textfield委托方法的可能重复项，并检查此textfield然后打开对话框SuperView是否不是此处的解决方案。链接按我所需工作。您的

点击.delegate=self

做什么？似乎由于您遗漏了某些内容，

UITapGestureRecognitor

无法正常工作。