iOS自定義全屏返回與tableView左劃刪除手勢衝突解決

當自定義一個navigationController實現全屏右劃返回時, 使用起來是否是很爽, 代碼以下:

 

- (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中打開左劃編輯功能時發現死活也左劃不了, 腫麼肥四呢, 是打開姿式不對嗎, MGD!  仍是手勢衝突呢?

        好吧, 打個斷點試試! 斷點後發現進不來tableView的編輯方法,  進到了自定義的navigationController的gestureRecognizerShouldBegin方法, 原來是被攔截了.  那來判斷一下是左劃仍是右劃吧, 若是左劃的話就不攔截, 交給tableView去響應! 代碼以下:

 

- (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;
}

貌似能夠了! 歐耶!

可若是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