touchesEnd沒有被稱為bit touchesBegin和touchesMoved被調用

Question

我試圖在ios中拖延。 如果拖動移動距離很短，我會將拖動計為點擊事件，方法是將開始x，y（來自touchesBegan）與touchesEnd中的x，y進行比較。 似乎touchesEnd永遠不會被調用。 我給了一個斷點來驗證它並且斷點從未消失。

code:
- (void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {

    NSUInteger touchCount = [touches count];
    NSUInteger tapCount = [[touches anyObject] tapCount];

    [ self UpdateDrag];

   }

- (void) touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
    NSUInteger touchCount = [touches count];
    NSUInteger tapCount = [[touches anyObject] tapCount];

    }


- (void) touchesEnd:(NSSet *)touches withEvent:(UIEvent *)event {
   // this methes never gets called 
    NSUInteger touchCount = [touches count];
    NSUInteger tapCount = [[touches anyObject] tapCount];


    if (mDisplay==nil)
    {
        mDisplay = [[cDisplayYesOrNo_iPhone alloc]
                    initWithNibName:@"cDisplayYesOrNo_iPhone"
                    bundle:[NSBundle mainBundle]];
    }
    [ mDisplay SetUp];
    [self presentModalViewController: mDisplay animated:NO];


}

Answer 1

是- (void)touchesEnded: not - (void)touchesEnd:

https://developer.apple.com/library/ios/documentation/uikit/reference/UIResponder_Class/Reference/Reference.html#//apple_ref/occ/instm/UIResponder/touchesEnded:withEvent ：

Answer 2

你需要編輯touchesEnd到touchesEnded 。

此外，對於完整性，你需要考慮你是否還需要應對touchesCancelled這就是所謂的替代touchesEnded在某些情況下。