滑动手势识别器不会触发？

Question

我有一个页面视图控制器，其中显示了五个视图控制器。

我尝试添加这些滑动手势但是没有被调用？

   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];

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

Answer 1

向self.view添加手势

[self.view addGestureRecognizer:swipeGestureRight];

我希望它会起作用

Answer 2

试试这个

• 设置UIGestureRecognizer和

的代理人

• 实施shouldRecognizeSimultaneouslyWithGestureRecognizer：

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

• 实施shouldReceiveTouch：

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

希望这会有所帮助。如果你仍然面临这个问题，请告诉我。