ios - 如何创建 UIBarButton 以使用 Swift 调用 UITapGestureRecognizer 函数？

Question

在我的场景中，我正在尝试实现 UIBarButton 单击以调用以下两个 函数。下面的代码已经适用于 view tab 和平移 但现在我正在更改按钮单击以调用下面两个函数。如何修改下面的代码？

@objc
    func handleCardTap(recognzier:UITapGestureRecognizer) {
        switch recognzier.state {
        case .ended:
            animateTransitionIfNeeded(state: nextState, duration: 0.9)
        default:
            break
        }
    }

    @objc
    func handleCardPan (recognizer:UIPanGestureRecognizer) {
        switch recognizer.state {
        case .began:
            startInteractiveTransition(state: nextState, duration: 0.9)
        case .changed:
            let translation = recognizer.translation(in: self.cardViewController.handleArea)
            var fractionComplete = translation.y / cardHeight
            fractionComplete = cardVisible ? fractionComplete : -fractionComplete
            updateInteractiveTransition(fractionCompleted: fractionComplete)
        case .ended:
            continueInteractiveTransition()
        default:
            break
        }

    }

Answer 1

如果您需要从 UIBarButtonItem 调用这两个点击手势识别器函数，最好的办法是创建自定义 View 栏按钮项并将手势识别器添加到该自定义 View 。这样的事情会起作用:

let tapGestureView = UIView() // initialize & size this as you need
tapGestureView.addGestureRecognizer(UITapGestureRecognizer(action: #selector(handleCardTap(_:)), target: self))
tapGestureView.addGestureRecognizer(UITapGestureRecognizer(action: #selector(handleCardPan(_:)), target: self))
let barButton = UIBarButtonItem(customView: tapGestureView)

以下是 UITapGestureRecognizers 的一些额外资源 和 UIBarButtonItems .不过，为同一 View 设置 2 个不同的点击手势似乎有点奇怪，其中一个是平移 Action (至少从名字上看)似乎很奇怪，但这就是你实现它的方式!