ios - 让 UIPanGesture 和 UISwipeGesture 朝同一方向协同工作

Question

我已将我的 UIView 设置为在平移 View 时调用一个方法，并在向上滑动 View 时调用其他方法。我的平移工作正常，如果我的 velocity.y 超过某个限制，我可以让我的平移保持禁用状态，但是当我的平移失败时，我永远无法让滑动 Action 起作用。我试过使用委托(delegate)方法，但运气不佳。查看了这个解决方案但没有运气:https://stackoverflow.com/a/21728621/1925859

- (void)viewDidLoad
{
    [super viewDidLoad];

    UIPanGestureRecognizer * panRec = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(handlePan:)];
    panRec.delegate = self;
    [panedView addGestureRecognizer:panRec];

    UISwipeGestureRecognizer * swipeRec = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipe:)];
    swipeRec.delegate = self;
    [panedView addGestureRecognizer:swipeRec];

    [swipeRec requireGestureRecognizerToFail:panRec];
}

- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer
{
    if ([gestureRecognizer isKindOfClass:[UIPanGestureRecognizer class]])
    {
        UIPanGestureRecognizer *pan = (UIPanGestureRecognizer *)gestureRecognizer;
        CGPoint velocity = [pan velocityInView:gestureRecognizer.view];
        if (ABS(velocity.y) > 200)
        {

            NSLog(@"Swipe actiavted");
            return NO;
        }
    }
        return YES;  
}

 - (IBAction)handleSwipe:(UISwipeGestureRecognizer *)recognizer
{
    NSLog(@"In Swipe");
     if(recognizer.direction == UISwipeGestureRecognizerDirectionUp)
    {
        panedView.frame =CGRectOffset( panedView.frame, 0, -1*self.view.bounds.size.height*.80);
    }
}

Answer 1

如果您删除委托(delegate)方法，为滑动添加方向并更改 requireGestureRecognizerToFail 的接收器，那么它将起作用。请注意，平移必须比扫描慢得多才能被识别。

- (void)viewDidLoad
{
    [super viewDidLoad];

    UIPanGestureRecognizer * panRec = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(handlePan:)];
    [panedView addGestureRecognizer:panRec];

    UISwipeGestureRecognizer * swipeRec = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipe:)];

    swipeRec.direction = UISwipeGestureRecognizerDirectionUp;
    [panedView addGestureRecognizer:swipeRec];

    [panRec requireGestureRecognizerToFail:swipeRec];
}


- (IBAction)handleSwipe:(UISwipeGestureRecognizer *)recognizer
{
    NSLog(@"In Swipe");
    if(recognizer.direction == UISwipeGestureRecognizerDirectionUp)
    {
        panedView.frame =CGRectOffset( panedView.frame, 0, -1*self.view.bounds.size.height*.80);
    }
}

- (IBAction)handlePan:(UISwipeGestureRecognizer *)recognizer
{
    NSLog(@"PAN");
}