UITapGestureRecognizer - 单击和双击

Question

我正在尝试向视图添加2 UITapGestureRecognizers，一个用于单击，一个用于双击事件。单击识别器按预期工作（单独）。但我似乎无法让双击识别器工作。

尝试使用以下属性进行试验：cancelsTouchesInView，delaysTouchesBegan和delaysTouchesEnded，但仍无效。

当我双击时，单击识别器将始终被激活，双击事件也将被发送到超级视图。但是，似乎根本没有通知自定义双击识别器。

文件似乎表明上述3个属性可用于此目的。但我只是不确定应该设置什么值以及哪个识别器（单个，双个或两个）。希望熟悉这一点的人可以提供帮助。

以下是最新更新的代码块。

// ****** gesture recognizers ******

- (void)addSingleAndDoubleTapGestureRecognizersToView:(UIView *)view
{
    // single tap    
    UITapGestureRecognizer *singleTapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget: tableViewController action: @selector(handleSingleTapOnView:)];                                 
    [singleTapRecognizer setNumberOfTouchesRequired:1];
    [view addGestureRecognizer: singleTapRecognizer];

    // double tap 
    UITapGestureRecognizer *doubleTapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget: tableViewController action: @selector (handleDoubleTapOnView:)];        
    [doubleTapRecognizer setNumberOfTouchesRequired:2];         
    [singleTapRecognizer requireGestureRecognizerToFail: doubleTapRecognizer];
    [view addGestureRecognizer: doubleTapRecognizer];         
}

- (void)handleSingleTapOnView:(id)sender
{

}

- (void)handleDoubleTapOnView:(id)sender
{

}

Answer 1

UITapGestureRecognizer *singleTap = [[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(doSingleTap)] autorelease];
singleTap.numberOfTapsRequired = 1; 
[self.view addGestureRecognizer:singleTap];

UITapGestureRecognizer *doubleTap = [[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(doDoubleTap)] autorelease];
doubleTap.numberOfTapsRequired = 2; 
[self.view addGestureRecognizer:doubleTap];

[singleTap requireGestureRecognizerToFail:doubleTap];

注意： 如果您使用的是 numberOfTouchesRequired ，则必须 {{1} }

对于Swift

.numberOfTouchesRequired = 1;

Answer 2

Swift 3解决方案：

let singleTap = UITapGestureRecognizer(target: self, action:#selector(self.singleTapAction(_:)))
singleTap.numberOfTapsRequired = 1
view.addGestureRecognizer(singleTap)

let doubleTap = UITapGestureRecognizer(target: self, action:#selector(self.doubleTapAction(_:)))
doubleTap.numberOfTapsRequired = 2
view.addGestureRecognizer(doubleTap)

singleTap.require(toFail: doubleTap)

在代码行 singleTap.require（toFail：doubleTap） 中，我们强制单击等待并确保点击事件不是双击。

Answer 3

您需要使用requireGestureRecognizerToFail：方法。像这样：

[singleTapRecognizer requireGestureRecognizerToFail:doubleTapRecognizer];

Answer 4

// ----首先你必须分配双击和单击手势------- //

UITapGestureRecognizer* doubleTap = [[UITapGestureRecognizer alloc] initWithTarget : self action : @selector (handleDoubleTap:)];

UITapGestureRecognizer* singleTap = [[UITapGestureRecognizer alloc] initWithTarget : self action : @selector (handleSingleTap:)];

[singleTap requireGestureRecognizerToFail : doubleTap];
[doubleTap setDelaysTouchesBegan : YES];
[singleTap setDelaysTouchesBegan : YES];

// -----------------------点击次数---------------- // < / p>

[doubleTap setNumberOfTapsRequired : 2];
[singleTap setNumberOfTapsRequired : 1];

// -------在视图或按钮上添加双击和单击手势-------- //

[self.view addGestureRecognizer : doubleTap];
[self.view addGestureRecognizer : singleTap];

Answer 5

不确定这究竟是你在寻找什么，但我没有手势识别器就做了单/双击。我在UITableView中使用它，所以我在didSelectRowAtIndexPath方法中使用了该代码

    tapCount++;
    switch (tapCount)
    {
        case 1: //single tap
            [self performSelector:@selector(singleTap:) withObject: indexPath afterDelay: 0.2];
            break;
        case 2: //double tap
            [NSObject cancelPreviousPerformRequestsWithTarget:self selector:@selector(singleTap:) object:indexPath];
            [self performSelector:@selector(doubleTap:) withObject: indexPath];
            break;
        default:
            break;
    }
    if (tapCount>2) tapCount=0;

使用NSIndexPath作为参数，方法singleTap和doubleTap只是空的：

- (void)singleTap:(NSIndexPath *)indexPath {
  //do your stuff for a single tap
}

- (void)doubleTap:(NSIndexPath *)indexPath {
  //do your stuff for a double tap
}

希望有所帮助

Answer 6

Swift 2的解决方案：

.ebextensions/efs.config

Answer 7

我实现了UIGestureRecognizerDelegate方法来检测singleTap和doubleTap。

就这样做。

 UITapGestureRecognizer *doubleTap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(handleDoubleTapGesture:)];
    [doubleTap setDelegate:self];
    doubleTap.numberOfTapsRequired = 2;
    [self.headerView addGestureRecognizer:doubleTap];

    UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(handleSingleTapGesture:)];
    singleTap.numberOfTapsRequired = 1;
    [singleTap setDelegate:self];
    [doubleTap setDelaysTouchesBegan:YES];
    [singleTap setDelaysTouchesBegan:YES];
    [singleTap requireGestureRecognizerToFail:doubleTap];
    [self.headerView addGestureRecognizer:singleTap];

然后实现这些委托方法。

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch{
    return  YES;
}

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{
    return YES;
}

Answer 8

某些视图内置了自己的双击识别器（MKMapView为例）。要解决此问题，您需要实施UIGestureRecognizerDelegate方法shouldRecognizeSimultaneouslyWithGestureRecognizer并返回YES：

首先实现双重和单一识别器：

// setup gesture recognizers
UITapGestureRecognizer* singleTapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self
                                                                                action:@selector(mapViewTapped:)];
singleTapRecognizer.delegate = self;
singleTapRecognizer.numberOfTapsRequired = 1;


UITapGestureRecognizer* doubleTapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self
                                                                                      action:@selector(mapViewDoubleTapped:)];
doubleTapRecognizer.delegate = self;    // this allows
doubleTapRecognizer.numberOfTapsRequired = 2;
[singleTapRecognizer requireGestureRecognizerToFail:doubleTapRecognizer];

然后实施：

#pragma mark UIGestureRecognizerDelegate
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer
*)otherGestureRecognizer {  return YES; }

Answer 9

参考@ stanley的评论 -

请勿尝试使用点击手势将选项排成UITableView，因为它已经完全点击处理....

但是你必须在视图中设置＆＃39;取消触摸＆＃39;到了没有＆＃39;在您的单击手势识别器上，或者它永远不会获得点击事件。