滑動手勢識別器未觸發？

Question

我有一個頁面視圖控制器，其中包含五個顯示的視圖控制器。

我嘗試添加這些滑動手勢，但沒有被調用？

   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];

為什么不觸發這些，我該怎么辦？ 我的目標是檢測用戶向哪個方向滑動頁面視圖控制器。

Answer 1

向self.view添加手勢

[self.view addGestureRecognizer:swipeGestureRight];

我希望它能起作用

Answer 2

嘗試這個

• 設置您的UIGestureRecognizer的代表，並

• 工具應使用shouldRecognizeSimultaneouslyWithGestureRecognizer ：

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

• 實現shouldReceiveTouch ：

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

希望這可以幫助。 讓我知道您是否仍然面對這個問題。