我尝试将 UISwipeGestureRecognizer 添加到我以编程方式创建的 UIColletionView 中,但识别器从未调用该操作。这是我的代码。
UICollectionViewFlowLayout *flowLayout = [[UICollectionViewFlowLayout alloc] init];
flowLayout.scrollDirection = UICollectionViewScrollDirectionVertical;
self.currentCollectionView = [[UICollectionView alloc] initWithFrame:CGRectMake( 0.0f, 54.0f, 320.0f, 470.0f) collectionViewLayout:flowLayout];
[self.currentCollectionView setBackgroundColor:[UIColor whiteColor]];
self.currentCollectionView.delegate = self;
self.currentCollectionView.dataSource = self;
self.currentCollectionView.showsHorizontalScrollIndicator = NO;
self.currentCollectionView.showsVerticalScrollIndicator = NO;
self.currentCollectionView.scrollEnabled = YES;
self.currentCollectionView.bounces = YES;
[self.currentCollectionView setBackgroundColor:[UIColor lightGrayColor]];
[self.currentCollectionView registerClass:[TripexpPhotoCell class] forCellWithReuseIdentifier:@"photoCell"];
[self.view addSubview:self.currentCollectionView];
self.swipeUpRecognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(didSwipeUp:)];
self.swipeUpRecognizer.numberOfTouchesRequired = 1;
[self.swipeUpRecognizer setDirection:UISwipeGestureRecognizerDirectionUp];
self.swipeDownRecognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(didSwipeDown:)];
self.swipeDownRecognizer.numberOfTouchesRequired = 1;
[self.swipeDownRecognizer setDirection:UISwipeGestureRecognizerDirectionDown];
[self.currentCollectionView addGestureRecognizer:self.swipeDownRecognizer];
[self.currentCollectionView addGestureRecognizer:self.swipeUpRecognizer];
这是同时接收相同识别器的函数和委托
#pragma mark - UISwipeGestureRecognizer Action
-(void)didSwipeUp: (UISwipeGestureRecognizer*) recognizer {
NSLog(@"Swiped Up");
}
-(void)didSwipeDown: (UISwipeGestureRecognizer*) recognizer {
NSLog(@"Swiped Down");
}
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
NSLog(@"Asking permission");
return YES;
}
我还在 UICollectionView 内部循环并检查是否有任何现有的 UISwipeGestureRecognizer 但我没有找到。所以在我附加了我的 2 个识别器之后,我看到了那些 2。