我已经尝试了子类化UICollectionView并覆盖touchesBegan:withEvent:和hitTest:WithEvent:,当我触摸单元格时,这两个方法都会触发.但是,如果我触摸单元格之间的空间,则根本不会发生任何事情.这是我创造的:
- @interface WSImageGalleryCollectionView : UICollectionView
- @end
..和..
- @implementation WSImageGalleryCollectionView
- - (void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
- {
- NSLog(@"Touches began");
- [super touchesBegan:touches withEvent:event];
- }
- - (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event {
- NSLog(@"Hit test reached");
- return [super hitTest:point withEvent:event];
- }
- @end
注意:手势识别器似乎有完全相同的问题,这就是为什么我尝试使用touchesBegan进行更低级别的操作.
解决方法
您只需将视图设置为背景视图,然后就可以添加手势识别器:
- collectionView.backgroundView = [[UIView alloc] init];
- [collectionView.backgroundView addGestureRecognizer:[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapOnBackgroundRecognized)]];