找出按下了哪个按钮，同时长按和点击之间存在差异。 swift

Question

所以我有长按和短按按钮的监听器，但我需要知道按下了哪个按钮。是否可以找出在 tap 和 long 函数中按下了什么按钮，还是我需要为每个按钮执行两个函数？

let tapGesture = UITapGestureRecognizer(target: self, action: #selector(tap))
let longGesture = UILongPressGestureRecognizer(target: self, action: #selector(long))
longGesture.minimumPressDuration = 0.5
smallOption.addGestureRecognizer(tapGesture)
mediumOption.addGestureRecognizer(tapGesture)
largeOption.addGestureRecognizer(tapGesture)
smallOption.addGestureRecognizer(longGesture)
mediumOption.addGestureRecognizer(longGesture)
largeOption.addGestureRecognizer(longGesture)

@objc func tap(_ sender: UIGestureRecognizer){
    print("short-press")
}
@objc func long(_ sender: UIGestureRecognizer){
    print("long-press")
}

Answer 1

您不需要为每个按钮的相同手势使用两个函数。更改方法定义以接受 UIButton（在您的情况下）而不是 UIGestureRecognizer。然后，直接通过验证标签或类型来检查发件人...

@objc func tap(_ sender: UIButton){
  switch sender {
  case button1: // or by tags of buttons
  case button2:
  ...
  default: break
}

Answer 2

在这种情况下，主要问题是仅为 largeOption 按钮添加两种手势！澄清一下，仅为一个组件添加手势，在您的情况下，应该仅为最新的组件添加手势（即 largeOption）：

smallOption.addGestureRecognizer(tapGesture) <-- skipped
mediumOption.addGestureRecognizer(tapGesture) <-- skipped
largeOption.addGestureRecognizer(tapGesture) <-- added
smallOption.addGestureRecognizer(longGesture) <-- skipped
mediumOption.addGestureRecognizer(longGesture) <-- skipped
largeOption.addGestureRecognizer(longGesture) <-- added

从逻辑上讲，这可能是您问题的答案：

Is it possible to find out what button was pressed in the tap and long function, or will I need to do two functions for each button?

您需要为每个按钮添加两个手势，因为一个特定的手势只能添加到一个视图。

但是，除了 @objc func tap(_ sender: UIGestureRecognizer) 和 @objc func long(_ sender: UIGestureRecognizer) 现有方法之外，您不必声明新的操作方法。您可以改为检查 sender 的视图。示例：

假设我们为每个按钮手动添加了拖曳手势：

// gestures:
let smallOptionTapGesture = UITapGestureRecognizer(target: self, action: #selector(tap))
let smallOptionLongGesture = UILongPressGestureRecognizer(target: self, action: #selector(long))
smallOptionLongGesture.minimumPressDuration = 0.5

let mediumOptionTapGesture = UITapGestureRecognizer(target: self, action: #selector(tap))
let mediumOptionLongGesture = UILongPressGestureRecognizer(target: self, action: #selector(long))
mediumOptionLongGesture.minimumPressDuration = 0.5

let largeOptionTapGesture = UITapGestureRecognizer(target: self, action: #selector(tap))
let largeOptionLongGesture = UILongPressGestureRecognizer(target: self, action: #selector(long))
largeOptionLongGesture.minimumPressDuration = 0.5

// adding them:
smallOption.addGestureRecognizer(smallOptionTapGesture)
mediumOption.addGestureRecognizer(mediumOptionTapGesture)
largeOption.addGestureRecognizer(largeOptionTapGesture)

smallOption.addGestureRecognizer(smallOptionLongGesture)
mediumOption.addGestureRecognizer(mediumOptionLongGesture)
largeOption.addGestureRecognizer(largeOptionLongGesture)

因此，您可以做的是：

@objc func tap(_ sender: UIGestureRecognizer) {
    // an example of how you could check the button
    if sender.view == smallOption {
        print("small short-press")
    } else if sender.view == mediumOption {
        print("medium short-press")
    } else if sender.view == largeOption {
        print("large short-press")
    }
}
@objc func long(_ sender: UIGestureRecognizer) {
    // you could apply the same above approach here
}

另一种选择是分别为每个按钮创建操作方法。

找出按下了哪个按钮，同时长按和点击之间存在差异。 swift

figure out which button was pressed while differ between long-press and tap. swift

uibutton

ios

swift