Question

我的视图控制器有两个识别器：

（viewDidLoad中）

//Add gestures
    UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:nil];
    [tap setDelaysTouchesBegan:YES];
    tap.delegate = self;
    [self.view addGestureRecognizer:tap];

    UISwipeGestureRecognizer *leftSwipe = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:nil];

    leftSwipe.delegate = self;

    [self.view addGestureRecognizer:leftSwipe];

点击我希望发生一些事情，刷卡我想做点别的事情。但是，点击始终同时调用滑动手势和点按手势。

如何根据动作调用它？

以下是我尝试辨别（但失败）的代码

-(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch{


    if ([gestureRecognizer isKindOfClass:[UISwipeGestureRecognizer class]]) {

        UISwipeGestureRecognizer *rg = (UISwipeGestureRecognizer*)gestureRecognizer;
        if (rg.direction == UISwipeGestureRecognizerDirectionRight && !self.itemsOnScreen) {
            NSLog(@"swipe");
            return YES;
        }else{
            return NO;

        }

    }

    if (self.itemsOnScreen) {

        self.itemsOnScreen = NO;

        //Actions for my tap

        return YES;

    }else{
        return NO;
    }
}

Answer 1

您可以为点击和滑动设置不同的方法，并为每个方法设置为操作，

你可以做点什么，

-(void)viewDidLoad
{
    UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(tap:)];
    [tap setDelaysTouchesBegan:YES];
    [self.view addGestureRecognizer:tap];

    UISwipeGestureRecognizer *leftSwipe = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swipe:)];

    [self.view addGestureRecognizer:leftSwipe];

}
- (IBAction)tap:(id)sender
{

    NSLog(@"taptap");
}
- (IBAction)swipe:(id)sender
{

    NSLog(@"swipe");
}

我测试过这对我有用。

Answer 2

<强>建议

除了其他人提到的建议外，您可能还想实施以下手势识别器代理方法：

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer  shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer

可能......

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRequireFailureOfGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer

以下是此主题Apple Documentation的链接。

Answer 3

UIGesture Rec上有一个回调方法......

// called when the recognition of one of gestureRecognizer or otherGestureRecognizer would be blocked by the other
// return YES to allow both to recognize simultaneously. the default implementation returns NO (by default no two gestures can be recognized simultaneously)
//
// note: returning YES is guaranteed to allow simultaneous recognition. returning NO is not guaranteed to prevent simultaneous recognition, as the other gesture's delegate may return YES
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer;

这应该可以解决你的问题

与UITapGestureRecognizer一起使用时，UISwipeGestureRecognizer不会注册滑动

3 个答案: