Question

我有一个收藏视图/滚动视图，我添加了我的UILongPressGestureRecognizer。它有效，但状态.Began只与州一起被解雇。结束。这对我来说不起作用，因为我想跟踪状态。更改为获取gesture.locationInView。

我发现的问题是它与集合视图的Scroll手势发生冲突。

如果我将scrollEnabled设置为false，则一切都按预期工作。

在我的viewDidLoad中我有

let longPressedGestureRecognizer = UILongPressGestureRecognizer(target: self, action: #selector(PhotosViewController.Scrubber(_:)))
self.scrubberCollectionView.addGestureRecognizer(longPressedGestureRecognizer)
longPressedGestureRecognizer.minimumPressDuration = 0.6
longPressedGestureRecognizer.delegate = self

self.scrubberCollectionView.addGestureRecognizer(longPressedGesture)

我还尝试添加这些以尝试在启用平移手势时使一个手势失败...（我也尝试了shouldRecognizeSimultaneouslyWithGestureRecognizer。

longPressedGestureRecognizer.requireGestureRecognizerToFail(scrubberCollectionView.panGestureRecognizer)

 func overridePan(gestureRecognizer: UILongPressGestureRecognizer, shouldRequireFailureOfGestureRecognizer otherGestureRecognizer: UIPanGestureRecognizer ) -> Bool {
        return (gestureRecognizer == longPressedGesture && otherGestureRecognizer == self.scrubberCollectionView.panGestureRecognizer )
    }

......无济于事。

对于我有的主要功能

        func Scrubber(gesture: UILongPressGestureRecognizer) {
            if (gesture.state == .Began ) {
                 print("Began")
            }
            else if (gesture.state == .Changed) {
                 print("Changed")
            }
            else if (gesture.state == .Ended){
                 print("Ended")
            }
        }

当我长按时，我没有触及任何事件，然后在触摸时我得到这些结果：

Began
Ended

实际的长按正在工作，如果我点击然后没有调用Scrubber功能，它只会在Ended状态下触发Began和Ended。

并将这些内容添加到viewDidLoad以尝试延迟滚动视图的触摸，甚至完全取消它...

self.scrubberCollectionView.delaysContentTouches = true

    let longPress = UILongPressGestureRecognizer()
    func gestureRecognizer(gestureRecognizer: UILongPressGestureRecognizer, shouldReceiveTouch touch: UITouch) -> Bool {

        if(touch.view == scrubberCollectionView && gestureRecognizer == longPress){
            return true
        }else{
            return false
        }
    }

......什么也没有。

Answer 1

我明白了。我在viewDidLoad中添加了shouldRequireFailureOfGestureRecognizer。它需要在它之外。

为了将它放在外面并使其工作，你需要在viewDidLoad之外创建你的手势变量（在我的情况下＆＃34; longPressedGesture＆＃34;）作为选项，如：

var longPressedGesture : UILongPressGestureRecognizer?

然后在viewDidLoad中创建手势

 longPressedGesture = UILongPressGestureRecognizer(target: self, action: #selector(PhotosViewController.Scrubber(_:)))
            longPressedGesture.delegate = self
            self.scrubberCollectionView.addGestureRecognizer(longPressedGesture)

UILongPressGestureRecognizer仅在Touch Up上触发（swift）

1 个答案: