很多時候,我們都需要在項目中添加長按手勢,比如UICollectionView中,我們長按對某一個item進行刪除,那么這時,我們就需要在集合試圖中添加長按的手勢,手勢的添加是簡單的,但是添加過手勢之后,我們怎么區(qū)分我們長按選中的是哪一個item呢
首先,我們先來看看我們是如何添加長按手勢的
1.創(chuàng)建集合試圖,這個就比較簡單了.創(chuàng)建完集合試圖,我們在集合試圖上面添加長按的手勢
UIGestureRecognizerDelegate 先遵從協(xié)議
longPressGr =[[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPressToDo:)];
longPressGr.minimumPressDuration=1.0;
longPressGr.delegate=self;
longPressGr.delaysTouchesBegan=YES;
[_myCollectionView addGestureRecognizer:longPressGr];
2.我們在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}
}
