滑动手势识别器不触发？

Question

我有一个页面视图控制器，其中显示了五个视图控制器。

我已经尝试添加这些滑动手势，但它们没有被调用？

   UISwipeGestureRecognizer *swipeGestureRight = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleRightSwipe:)];
swipeGestureRight.numberOfTouchesRequired = 1;
swipeGestureRight.direction = (UISwipeGestureRecognizerDirectionRight);
[self.scrollView addGestureRecognizer:swipeGestureRight];

UISwipeGestureRecognizer *swipeGestureLeft = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleLeftSwipe:)];
swipeGestureLeft.numberOfTouchesRequired = 1;
swipeGestureLeft.direction = (UISwipeGestureRecognizerDirectionLeft);
[self.scrollView addGestureRecognizer:swipeGestureLeft];

为什么这些没有被触发，我该怎么办？我的目标是检测用户滑动页面视图控制器的方向。

Answer 1

添加手势 self.view

[self.view addGestureRecognizer:swipeGestureRight];

希望有用

Answer 2

试试这个

• 设置您的UIGestureRecognizer和

的代表

• 实施shouldRecognizeSimultaneouslyWithGestureRecognizer:

  -(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{
  return YES;
  }
  

• 实施shouldReceiveTouch:

  - (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch
  {
   return YES;
  }
  

希望这对您有所帮助。如果您仍然遇到此问题，请告诉我。