ios - 在两个 UICollectionView 之间拖放

Question

我需要将一个单元格从CollectionView一个拖放到 CollectionView两个。一个 CollectionView 内的拖放是没有问题的，但我怎样才能将 Cell 从 CollectionView One 移到 CollectionView 2？

有任何想法吗？任何已经解决了这个问题的项目或框架？感谢您的帮助！

Answer 1

https://github.com/Ice3SteveFortune/i3-dragndrop Check this out - its a helper I'm working on to achieve just that. It also supports tableviews

UPDATE

I've recently released the second version of this codebase, called BetweenKit. Its now a fully-fledged drag-and-drop framework.

Hope it proves useful !

Answer 2

当您从第一个集合视图中选择单元格时，将其从此集合视图中删除，创建一个新视图作为该单元格的副本，并将其作为超级视图的子视图放在所有视图之上。使用平移手势使该视图可移动。一旦你“放下”这个中间单元，检测它的位置并将它添加到当前的集合视图中。

Answer 3

好的，这是以下示例中最简单的流程：

1. UIGestureRecognizer为每个添加UICollectionView。

2. 用一种方法连接每个手势识别器：

   @IBAction func longPressGestureChanged(recognizer: UILongPressGestureRecognizer) { ... }
   

3. 在为每个UIViewController添加：@IBOutletUICollectionView

   @IBOutlet var collectionViewGreen: UICollectionView!
   @IBOutlet var collectionViewYellow: UICollectionView!
   

4. 实现手势识别器方法来检测变化：

   @IBAction func longPressGestureChanged(recognizer: UILongPressGestureRecognizer) {
   
       let globalLocation = recognizer.locationInView(view)
   
       if CGRectContainsPoint(collectionViewGreen.frame, globalLocation) {
   
           //you cover green collection view
           let point = view.convertPoint(globalLocation, toView: collectionViewGreen)
           if let indexPath = collectionViewGreen.indexPathForItemAtPoint(point) {
              //you cover cell in green collection view
           } else {
               //you do not cover any of cells in green collection view
           }
   
       } else if CGRectContainsPoint(collectionViewYellow.frame, globalLocation) {
   
           //you cover yellow collection view
           let point = view.convertPoint(globalLocation, toView: collectionViewYellow)
           if let indexPath = collectionViewYellow.indexPathForItemAtPoint(point) {
               //you cover cell in yellow collection view
           } else {
               //you do not cover any of cells in yellow collection view
           }
   
       } else {
           //you do not cover any of collection views
       }
   }