ios - UIButton 不可点击但可接收手势

Question

我有一个 UIButton，我希望它能够用 pan 手势 移动，但不能单击它。我想要的是当用户点击按钮时按钮不会改变其外观，就像您只是点击一个 View 一样。将 isEnabled 设置为 false 并将 userInteractionIsEnabled 设置为 false 都会导致按钮未接收到平移事件。我可以通过自定义 View 实现所需的效果，但我可以通过按钮以某种方式实现吗？ 根据要求发布带有按钮创建的代码片段:

func createAnswerButton() {
    let width : CGFloat = 154
    let height : CGFloat = 60
    let originX = (view.frame.size.width - width) / 2
    let originY = startOverButton.frame.origin.y + collectionView.frame.size.height
    let frame = CGRect(x: originX, y: originY, width: width, height: height)
    let button = UIButton(frame: frame)
    answerButton = button
    button.backgroundColor = .clear
    self.answerButton.setTitleColor(.white, for: .normal)
    let image = UIImage(named: "item_neutral")
    button.setBackgroundImage(image, for: .normal)
    view.addSubview(button)

    let panGesture = UIPanGestureRecognizer(target: self, action: (#selector(MoviesViewController.didPanButton(_:))))
    button.addGestureRecognizer(panGesture)
}

Answer 1

要实现此目的，您必须将按钮的 adjustsImageWhenHighlighted 设置为 false(如果您想以编程方式执行此操作)。在界面生成器中，您可以将按钮 type 更改为 custom。

以下是以编程方式执行此操作的代码:

 override func viewDidLoad() {
    super.viewDidLoad()

    // Do any additional setup after loading the view.

    let width : CGFloat = 154
    let height : CGFloat = 60
    let originX = (view.frame.size.width - width) / 2
    let originY = (view.frame.size.height - width) / 2
    let frame = CGRect(x: originX, y: originY, width: width, height: height)

    let button = UIButton(type: .custom)
    button.adjustsImageWhenHighlighted = false
    button.frame = frame

    button.addTarget(self, action: #selector(buttonInCodeTapped), for: .touchUpInside)
    button.addGestureRecognizer(UIPanGestureRecognizer(target: self, action: #selector(panForButtonInCode(recognizer:))))
    button.setBackgroundImage(UIImage(named: "X"), for: .normal)
    view.addSubview(button)
}

这是该属性设置为 false 时的结果:

下面是该属性设置为 true 时的结果(您可以看到，点击时 X 会突出显示):