1、 UIScrollView里面嵌套兩個(gè)tableView，右邊一個(gè)tableView 又要實(shí)現(xiàn)左滑刪除功能，寫好左滑刪除的代理方法，準(zhǔn)備調(diào)試... 發(fā)現(xiàn)tableView左滑失效了，調(diào)試發(fā)現(xiàn)原來是UIScrollView的滑動(dòng)手勢和tableView的左滑手勢沖突了。

2、寫了一個(gè)繼承UISrollView類 MyScrollView，在里面重寫

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRequireFailureOfGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
  NSLog(@"_____%@______other:%@",gestureRecognizer,otherGestureRecognizer);
return NO;
}

（上面方法是UIGestureRecognizerDelegate有兩個(gè)沒公開的函數(shù)之一，只要重載了就會(huì)被調(diào)用，是可以通過appstore審核的）
調(diào)試輸出發(fā)現(xiàn) return NO會(huì)忽略otherGestureRecognizer 手勢（被攔截） ；return YES則會(huì)調(diào)用 otherGestureRecognizer的方法（不攔截）；但是需求是cell左滑的手勢可以執(zhí)行，而不是所有的手勢；單純的return YES會(huì)造成UISrollView 無法左右滑動(dòng)。

3、知道上面的的問題，那我們只需要判斷 如果otherGestureRecognizer是cell左滑的手勢 return yes 即可，其他return no。 通過調(diào)試打印發(fā)現(xiàn)

___<UIScrollViewPanGestureRecognizer: 0x138081870; state = Possible; delaysTouchesEnded = NO; view = <ANTScrollView 0x1370e9400>; target= <(action=handlePan:, target=<ANTScrollView 0x1370e9400>)>; must-fail = {
        <UIScrollViewPagingSwipeGestureRecognizer: 0x138014430; state = Failed; view = <ANTScrollView 0x1370e9400>; target= <(action=_handleSwipe:, target=<ANTScrollView 0x1370e9400>)>>
    }>______other:<UIScrollViewPanGestureRecognizer: 0x1380175c0; state = Possible; cancelsTouchesInView = NO; delaysTouchesEnded = NO; view = <UITableViewWrapperView 0x1370cec00>; targets= <(
    "(action=handlePan:, target=<UITableViewWrapperView 0x1370cec00>)",
    "(action=handleSwipeBeginning:, target=<UITableViewWrapperView 0x1370cec00>)"
)>>
2016-07-14 14:53:32.463 antQueen[7614:3034218] ___<UIScrollViewPanGestureRecognizer: 0x138081870; state = Possible; delaysTouchesEnded = NO; view = <ANTScrollView 0x1370e9400>; target= <(action=handlePan:, target=<ANTScrollView 0x1370e9400>)>; must-fail = {
        <UIScrollViewPagingSwipeGestureRecognizer: 0x138014430; state = Failed; view = <ANTScrollView 0x1370e9400>; target= <(action=_handleSwipe:, target=<ANTScrollView 0x1370e9400>)>>
    }>______other:<UIScrollViewDelayedTouchesBeganGestureRecognizer: 0x13807a5a0; state = Possible; delaysTouchesBegan = YES; view = <UITableView 0x13703f000>; target= <(action=delayed:, target=<UITableView 0x13703f000>)>>
2016-07-14 14:53:32.472 antQueen[7614:3034218] ___<UIScrollViewPanGestureRecognizer: 0x138081870; state = Possible; delaysTouchesEnded = NO; view = <ANTScrollView 0x1370e9400>; target= <(action=handlePan:, target=<ANTScrollView 0x1370e9400>)>; must-fail = {
        <UIScrollViewPagingSwipeGestureRecognizer: 0x138014430; state = Failed; view = <ANTScrollView 0x1370e9400>; target= <(action=_handleSwipe:, target=<ANTScrollView 0x1370e9400>)>>
    }>______other:<UIScrollViewDelayedTouchesBeganGestureRecognizer: 0x136db8360; state = Possible; delaysTouchesBegan = YES; view = <ANTScrollView 0x1370e9400>; target= <(action=delayed:, target=<ANTScrollView 0x1370e9400>)>>

我們發(fā)現(xiàn)其中有個(gè)UITableViewWrapperView這個(gè)就是我們要找的view，然后我們?cè)诜椒ɡ锩孀鰝€(gè)判斷：

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRequireFailureOfGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
    if ([otherGestureRecognizer.view isKindOfClass:NSClassFromString(@"UITableViewWrapperView")]) {
        return YES;
    }
    NSLog(@"_____%@______other:%@",gestureRecognizer,otherGestureRecognizer);
    return NO;
}

大功告成...調(diào)試發(fā)現(xiàn)cell可以實(shí)現(xiàn)左滑。

通過上面的私有方法，也可以去解決UIScrollView滑動(dòng)與UINavigationVIewController的手勢返回的沖突（自己研究下吧?。?/p>