是否可以禁用滑动手势而仅使平移手势在滚动视图中起作用？

Question

我使用UIScrollView来显示一些图像。我发现滑动手势和平移手势都可以。一次只能使摇动手势起作用吗？

我尝试了以下代码：

for gestureRecognizer in scrollView.gestureRecognizers ?? [] {
    if gestureRecognizer is UISwipeGestureRecognizer) {
        gestureRecognizer.isEnabled = false
    }
}

它不起作用。我打印scrollView.gestureRecognizers!，得到手势列表：

  

UIScrollViewDelayedTouchesBeganGestureRecognizer

     

UIScrollViewPanGestureRecognizer

     

_UIDragAutoScrollGestureRecognizer

     

UIScrollViewPagingSwipeGestureRecognizer

我尝试了UIScrollViewPagingSwipeGestureRecognizer：

if gestureRecognizer is UIScrollViewPagingSwipeGestureRecognizer) {
    gestureRecognizer.isEnabled = false
}

上面写着Use of undeclared type 'UIScrollViewPagingSwipeGestureRecognizer'。

Answer 1

如果我对您的理解正确...也许您可以使用以下UIScrollViewDelegate方法：

func scrollViewWillEndDragging(_ scrollView: UIScrollView, withVelocity velocity: CGPoint, targetContentOffset: UnsafeMutablePointer<CGPoint>) {
    targetContentOffset.pointee = scrollView.contentOffset
}