iOS/Swift:如何检测UITextField上的触摸动作 [英] iOS/Swift: how to detect touch action on a UITextField

问题描述

我想检测UITextField上的触摸动作.

I would like to detect the touch action on a UITextField.

似乎没有通过在文本字段内部进行触摸来触发"Touch Up Inside"操作.

It seems the "Touch Up Inside" action is not fired by touching inside the textfield.

推荐答案

UITextField似乎未启用"Touch Up Inside"，但"Touch Down"有效.

It seems "Touch Up Inside" is not enabled for UITextField, but "Touch Down" works.

因此解决方案如下:

Swift 4.x

myTextField.addTarget(self, action: #selector(myTargetFunction), for: .touchDown)
@objc func myTargetFunction(textField: UITextField) {
    print("myTargetFunction")
}

Swift 3.x

myTextField.addTarget(self, action: #selector(myTargetFunction), for: UIControlEvents.touchDown)

@objc func myTargetFunction(textField: UITextField) {
    print("myTargetFunction")
}

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