iOS自訂全屏返回與tableView左劃刪除手勢衝突解決

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當自訂一個navigationController實現全屏右劃返回時, 使用起來是不是很爽, 代碼如下:

 

- (void)viewDidLoad {    [super viewDidLoad];    UIGestureRecognizer  *gester = self.interactivePopGestureRecognizer;
    UIPanGestureRecognizer *panGesTer = [[UIPanGestureRecognizer alloc] initWithTarget:gester.delegate action:NSSelectorFromString(@"handleNavigationTransition:")];
    [gester.view addGestureRecognizer:panGesTer];
    gester.delaysTouchesBegan = YES;
    panGesTer.delegate = self;}

-(BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer{

    if (self.childViewControllers.count == 1 ) {

        return NO;

    }

    return YES;

}

 

        然鵝, 當你在tableView中開啟左劃編輯功能時發現死活也左劃不了, 腫麼肥四呢, 是開啟姿勢不對嗎, MGD!  還是手勢衝突呢?

        好吧, 打個斷點試試! 斷點後發現進不來tableView的編輯方法,  進到了自訂的navigationController的gestureRecognizerShouldBegin方法, 原來是被攔截了.  那來判斷一下是左劃還是右劃吧, 如果左劃的話就不攔截, 交給tableView去響應! 代碼如下:

 

- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer{    if ([gestureRecognizer isKindOfClass:[UIPanGestureRecognizer class]]) {                if (self.childViewControllers.count == 1 ) {            return NO;        }                if (self.interactivePopGestureRecognizer &&            [[self.interactivePopGestureRecognizer.view gestureRecognizers] containsObject:gestureRecognizer]) {                        CGPoint tPoint = [(UIPanGestureRecognizer *)gestureRecognizer translationInView:gestureRecognizer.view];                        if (tPoint.x >= 0) {                CGFloat y = fabs(tPoint.y);                CGFloat x = fabs(tPoint.x);                CGFloat af = 30.0f/180.0f * M_PI;                CGFloat tf = tanf(af);                if ((y/x) <= tf) {                    return YES;                }                return NO;                            }else{                return NO;            }        }    }        return YES;}

貌似可以了! 歐耶!

可如果tableView也有右劃呢......

史上最詳細的iOS之事件的傳遞和響應機制-原理篇

iOS自訂全屏返回與tableView左劃刪除手勢衝突解決