禁用 uicollectionview 水平滚动的外部平移手势

Posted 2023-03-14

【中文标题】禁用 uicollectionview 水平滚动的外部平移手势

【英文标题】：disable external pan gesture for uicollectionview horizontal scroll

【发布时间】：2018-11-07 12:45:39

【问题描述】：

在我的 viewController 中，我有一个 CollectionView:mainCollectionView 作为 UIView 子视图，其中包含三个水平滚动的单元格（viewController 框架大小）。 mainCollectionView 也有一个 panGesture 显示另一个 viewController：sideMenuController。

在我的mainCollectionView Cell 中是另一个水平滚动的collectionView：weekCollectionView 作为子视图。当我在 weekCollectionView 中滚动时，我将如何禁用 panGesture 和 mainCollectionView 滚动？

这是我的代码 -

mainCollectionView panGesture:

fileprivate func setupPanGesture() 
        panGesture = UIPanGestureRecognizer(target: self, action: #selector(panRight(sender:)))
        panGesture.delegate = self
        mainCollectionView.addGestureRecognizer(panGesture)
    

@objc func panRight(sender: UIPanGestureRecognizer) 
    let translation = sender.translation(in: mainCollectionView)
    let indexPath = NSIndexPath(item: 0, section: 0)
    if (mainCollectionView.cellForItem(at: indexPath as IndexPath) != nil) 
        if translation.x > 0 
            (UIApplication.shared.keyWindow?.rootViewController as? MasterViewController)?.handlePan(sender: sender)
            mainCollectionView.isScrollEnabled = false
         else if translation.y > 0 || translation.y < 0 
            panGesture.isEnabled = false
            mainCollectionView.isScrollEnabled = true
        
    
    if (mainCollectionView.cellForItem(at: indexPath as IndexPath) == nil) 
        panGesture.isEnabled = false
        mainCollectionView.isScrollEnabled = true
    
    panGesture.isEnabled = true
    mainCollectionView.isScrollEnabled = true


func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWith otherGestureRecognizer: UIGestureRecognizer) -> Bool 
    return true

【参考方案1】：

实现 UIGestureRecognizerDelegate 到你的类

将手势委托设置为自身。

panGesture.delegate = self

添加这个委托功能

func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWith otherGestureRecognizer: UIGestureRecognizer) -> Bool 
    if (gestureRecognizer is UIPanGestureRecognizer || gestureRecognizer is UIRotationGestureRecognizer) 
        return true
     else 
        return false