UIScrollView覆蓋我的子視圖的平移手勢識別器

Question

如果我有一個帶有子視圖的scrollView，並且子視圖有一個平移手勢識別器，則scrollView的平移手勢覆蓋子視圖的平移。我想要的是相反的，我認爲，所以我拖動一個子視圖，它將在滾動視圖內平移，但如果我觸摸另一個區域，滾動視圖將平常平移。有沒有簡單的方法來設置？

Answer 1

這裏對我來說是什麼在起作用：

UIPanGestureRecognizer *subviewPanRecognizer = [[UIPanGestureRecognizer alloc] 
    initWithTarget:self action:@selector(panSubview:)]; 
[subview addGestureRecognizer:subviewPanRecognizer]; 

// play nice with subview's pan gesture 
[scrollView.panGestureRecognizer 
    requireGestureRecognizerToFail:subviewPanRecognizer]; 

Answer 2

覆蓋下面這兩個代表，

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

}

這將讓你認識到這兩個手勢，默認的回報是NO，所以我們需要覆蓋它並返回YES。

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldBeRequiredToFailByGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{ 
if ([gestureRecognizer isKindOfClass:[UITapGestureRecognizer class]]) { 
    if ([otherGestureRecognizer isKindOfClass:[UIPanGestureRecognizer class]]) { 
     return NO; 
    }else{ 
     return YES; 
    } 
} 
return YES; 

}

在這個委託作爲你願意，你可以做任何事情，因爲它的名字gestureRecoginzer將需要由otherGestureRecognizer失敗，所有你需要做的是判斷什麼這兩種手勢中的一種並返回YES或NO。