UICollectionView Cell 任意拖拽重排
1.首先给你的CollectionView 添加长按手势：
UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(handleLongPressGesture:)];
[self.collectionview addGestureRecognizer:longPress];
2.手势中处理只支持ios9之后
- (void)handleLongPressGesture:(UILongPressGestureRecognizer*)recognizer{
switch(recognizer.state) {
case UIGestureRecognizerStateBegan: {
NSIndexPath *indexPath = [self.collection indexPathForItemAtPoint:[recognizer locationInView:self.collection]];
if(nil== indexPath) {
break;
}
// 在路径上则开始移动该路径上的cell
[self.collection beginInteractiveMovementForItemAtIndexPath:indexPath];
break;
}
case UIGestureRecognizerStateChanged: {
// 移动过程当中随时更新cell位置
[self.collection updateInteractiveMovementTargetPosition:[recognizer locationInView:self.collection]];
break;
}
case UIGestureRecognizerStateEnded: {
// 移动结束后关闭cell移动
[self.collection endInteractiveMovement];
break;
}
default: {
[self.collection cancelInteractiveMovement];
break;
}
}
}
3.添加collectionviewitem的移动方法
- (void)collectionView:(UICollectionView*)collectionView moveItemAtIndexPath:(NSIndexPath*)sourceIndexPath toIndexPath:(NSIndexPath*)destinationIndexPath{
BOOLcanChange =self.dataArray.count> sourceIndexPath.item&&self.dataArray.count> destinationIndexPath.item;
if(canChange) {
[self handleDatasourceExchangeWithSourceIndexPath:sourceIndexPath destinationIndexPath:destinationIndexPath];
}
}
- (void)handleDatasourceExchangeWithSourceIndexPath:(NSIndexPath*)sourceIndexPath destinationIndexPath:(NSIndexPath*)destinationIndexPath{
NSMutableArray *tempArr = [self.dataArray mutableCopy];
NSIntegeractiveRange = destinationIndexPath.item- sourceIndexPath.item;
BOOLmoveForward = activeRange >0;
NSIntegeroriginIndex =0;
NSIntegertargetIndex =0;
for(NSIntegeri =1; i <=labs(activeRange); i ++) {
NSIntegermoveDirection = moveForward?1:-1;
originIndex = sourceIndexPath.item+ i*moveDirection;
targetIndex = originIndex -1*moveDirection;
[tempArrexchangeObjectAtIndex:originIndexwithObjectAtIndex:targetIndex];
}
}
