QQ20181010-151146-HD.gif
1.为cell添加长按手势
let tap = UILongPressGestureRecognizer(target: self, action: #selector(delectBtn(_:)))
tap.minimumPressDuration = 1
tap.numberOfTouchesRequired = 1
cell.addGestureRecognizer(tap)
2.为长按手势添加事件
@objc func delectBtn(_ sender: UILongPressGestureRecognizer) {
switch sender.state {
case .began:
//取得要移动cell的索引
let selectedCellIndex = collectionView.indexPathForItem(at: sender.location(in: collectionView))
//开始移动
collectionView.beginInteractiveMovementForItem(at: selectedCellIndex!)
case .changed:
//移动ing
collectionView.updateInteractiveMovementTargetPosition(sender.location(in: collectionView))
case .ended:
//结束移动
collectionView.endInteractiveMovement()
default:
//取消移动
collectionView.cancelInteractiveMovement()
}
}
3.处理移动后数据的改变
//sourceIndexPath.item移动前cell的索引
//destinationIndexPath.item移动后的索引
func collectionView(_ collectionView: UICollectionView, moveItemAt sourceIndexPath: IndexPath, to destinationIndexPath: IndexPath) {
let tempMybook = mybook[sourceIndexPath.item]
mybook.remove(at: sourceIndexPath.item)
mybook.insert(tempMybook, at: destinationIndexPath.item)
}