如何在 UIView 上使用 UIPanGestureRecognizer 时禁用滚动

Question

在我的应用程序中，我有一个包含在 UIScrollView 中的可拖动 UIView，以便我可以缩放它。这个移动 UIView 有一个 UIPanGestureRecognizer 但是如果我先放大然后我尝试移动 UIView，那不会发生，而是执行滚动就像没有检测到 UIPanGestureRecognizer .

这是我关联到 UIPanGestureRecognizer 的方法：

func handlePan(recognizer: UIPanGestureRecognizer) {
    if (self.panRec.state == UIGestureRecognizerState.Began) {
        self.scrollViewContainer.scrollEnabled = false
    }

    else if (self.panRec.state == UIGestureRecognizerState.Ended) {
        self.scrollViewContainer.scrollEnabled = true
    }

    let translation = recognizer.translationInView(self)
    if let view = recognizer.view {
        self.center = CGPoint(x:view.center.x + translation.x,
            y:view.center.y + translation.y)
    }
    recognizer.setTranslation(CGPointZero, inView: self)
    self.updatePinsPosition()

}

如您所见，我尝试在用户点击可拖动对象 UIView 时禁用滚动并在最后重新激活它，但它不起作用。我在哪里犯了错误？我错过了什么？

更新所以更好地解释我自己，我有一个 UIScrollView 其中包含一个 UIView 并且在最后一个里面还有一些其他 UIViews 作为捏，天蓝色的。我决定进一步使用 UIView 作为容器，以便子视图通过滚动一起缩放。所以，我的缩放代码如下：

class PhotoViewController: UIViewController, UINavigationControllerDelegate, UIImagePickerControllerDelegate, UIScrollViewDelegate {

  @IBOutlet weak var scrollView: UIScrollView!
  @IBOutlet weak var containerView: ContainerController!

  override func viewDidLoad() {
    ...
    self.scrollView.delegate = self
    self.scrollView.showsVerticalScrollIndicator = true
    self.scrollView.flashScrollIndicators()

    self.scrollView.minimumZoomScale = 1.0
    self.scrollView.maximumZoomScale = 10.0

  }

  func viewForZoomingInScrollView(scrollView: UIScrollView) -> UIView? {
    return self.containerView
  }

}

Answer 1

You have to override this method of Scrollview Delegate in your ViewController for both zooming and panning

- (void)scrollViewDidEndZooming:(UIScrollView *)scrollView withView:(UIView *)view atScale:(float)scale {

   scale *= [[[self.scrollView window] screen] scale];
   [view setContentScaleFactor:scale]; // View which you want to Zoom & pan.
   for (UIView *subview in view.subviews) {
    [subview setContentScaleFactor:scale]; // all the Container Views
    }
 }

希望能帮到您解决问题。

如何在 UIView 上使用 UIPanGestureRecognizer 时禁用滚动

How to disable scrolling while using UIPanGestureRecognizer on a UIView

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