UICollectionView添加长按手势,长按选中某一个item

很多时候,我们都需要在项目中添加长按手势,比如UICollectionView中,我们长按对某一个item进行删除,那么这时,我们就需要在集合试图中添加长按的手势,手势的添加是简单的,但是添加过手势之后,我们怎么区分我们长按选中的是哪一个item呢

首先,我们先来看看我们是如何添加长按手势的

1.创建集合试图,这个就比较简单了.创建完集合试图,我们在集合试图上面添加长按的手势

UIGestureRecognizerDelegate 先遵从协议

longPressGr = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPressToDo:)];
    longPressGr.minimumPressDuration = 1.0;
    longPressGr.delegate = self;
    longPressGr.delaysTouchesBegan = YES;
    [_myCollectionView addGestureRecognizer:longPressGr];

2.我们在longpressToDo里面添加方法

-(void)longPressToDo:(UILongPressGestureRecognizer *)gestureRecognizer
{
    if (gestureRecognizer.state != UIGestureRecognizerStateEnded) {
        return;
    }
    CGPoint p = [gestureRecognizer locationInView:self.collectionView];

    NSIndexPath *indexPath = [self.collectionView indexPathForItemAtPoint:p];
    if (indexPath == nil){
        NSLog(@"couldn‘t find index path");
    } else {
        // get the cell at indexPath (the one you long pressed)
        UICollectionViewCell* cell =
        [self.collectionView cellForItemAtIndexPath:indexPath];
        // do stuff with the cell
    }
}

在else里面我们根据indexpath对不同的item进行区分,这样是不是很简单