利用UICollectionView模仿iOS系統桌面圖標的交互：LxGridView

利用UICollectionView模仿iOS系統桌面圖標的交互，作用如動圖。

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Installation

You only need drag directory LxGridView to your project.

Support

Minimum support iOS version: iOS 6.0

Usage

You can use LxGridView as convenient as UICollectionView.

_gridViewFlowLayout = [[LxGridViewFlowLayout alloc]init];
//  ... config _gridViewFlowLayout
_gridView = [[LxGridView alloc]initWithFrame:GRIDVIEW_FRAME collectionViewLayout:_gridViewFlowLayout];
//  ... congif _gridView
[_gridView registerClass:[LxGridViewCell class] forCellWithReuseIdentifier:GRIDVIEW_CELL_REUSE_IDENTIFIER];
//  implement delegate method

(NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section
{
  return self.dataArray.count;
}

(UICollectionViewCell )collectionView:(UICollectionView )collectionView cellForItemAtIndexPath:(NSIndexPath )indexPath
{
  LxGridViewCell  cell = [collectionView dequeueReusableCellWithReuseIdentifier:LxGridViewCellReuseIdentifier forIndexPath:indexPath];
cell.delegate = self;
  cell.editing = _gridView.editing;
//  ... config cell
return cell;
}

(void)collectionView:(UICollectionView )collectionView itemAtIndexPath:(NSIndexPath )sourceIndexPath willMoveToIndexPath:(NSIndexPath )destinationIndexPath
{
  NSDictionary  dataDict = self.dataArray[sourceIndexPath.item];
  [self.dataArray removeObjectAtIndex:sourceIndexPath.item];
  [self.dataArray insertObject:dataDict atIndex:destinationIndexPath.item];
}

(void)deleteButtonClickedInGridViewCell:(LxGridViewCell )gridViewCell
{
  NSIndexPath  gridViewCellIndexPath = [_gridView indexPathForCell:gridViewCell];
if (gridViewCellIndexPath) {

  [self.dataArray removeObjectAtIndex:gridViewCellIndexPath.item];
  [_gridView performBatchUpdates:^{
      [_gridView deleteItemsAtIndexPaths:@[gridViewCellIndexPath]];
  } completion:nil];

}
}</pre>

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