iPhone模拟器向右滑动可以，但向左滑动不行？

Question

我正在尝试在 UIScrollView 上左右滑动。然而，看起来向左滑动在 iPhone 模拟器中不起作用，尽管向右滑动可以。我错过了什么步骤吗？

- (void)viewWillAppear:(BOOL)animated {    [super viewWillAppear:animated];    self.scrollView.multipleTouchEnabled = YES;    UISwipeGestureRecognizer *swipe = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipe:)];    swipe.delaysTouchesBegan = YES;    swipe.numberOfTouchesRequired = 2;    [self.scrollView addGestureRecognizer:swipe];    [swipe release];}- (void)handleSwipe:(UISwipeGestureRecognizer *)recognizer{    if (recognizer.direction == UISwipeGestureRecognizerDirectionLeft) {    } else if (recognizer.direction == UISwipeGestureRecognizerDirectionRight) {    }}

Answer 1

使用以下内容:

UISwipeGestureRecognizer *rightRecognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(rightSwipeHandle:)];
rightRecognizer.direction = UISwipeGestureRecognizerDirectionRight;
[rightRecognizer setNumberOfTouchesRequired:1];
[mainSlideShowImageScrollView addGestureRecognizer:rightRecognizer];
[rightRecognizer release];
UISwipeGestureRecognizer *leftRecognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(leftSwipeHandle:)];
leftRecognizer.direction = UISwipeGestureRecognizerDirectionLeft;
[leftRecognizer setNumberOfTouchesRequired:1];
[mainSlideShowImageScrollView addGestureRecognizer:leftRecognizer];
[leftRecognizer release];   



- (void)rightSwipeHandle:(UISwipeGestureRecognizer*)gestureRecognizer 
   {
      //Do moving
   }

- (void)leftSwipeHandle:(UISwipeGestureRecognizer*)gestureRecognizer 
{
  // do moving
}