我想在视图中添加2个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。
试图尝试像cancelsTouchesInView，delaysTouchesBegan和delaysTouchesEnded这样的属性，但仍然无效。
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
{
}
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：如果你使用numberOfTouchesRequired，它必须是.numberOfTouchesRequired = 1;
对于斯威夫特
let singleTapGesture = UITapGestureRecognizer(target: self, action: #selector(didPressPartButton))
singleTapGesture.numberOfTapsRequired = 1
view.addGestureRecognizer(singleTapGesture)
let doubleTapGesture = UITapGestureRecognizer(target: self, action: #selector(didDoubleTap))
doubleTapGesture.numberOfTapsRequired = 2
view.addGestureRecognizer(doubleTapGesture)
singleTapGesture.require(toFail: doubleTapGesture)
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。
您需要使用requireGestureRecognizerToFail：方法。像这样的东西：
[singleTapRecognizer requireGestureRecognizerToFail:doubleTapRecognizer];
// ----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---------------- //
[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];
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;
方法singleTap和doubleTap只是无效，NSIndexPath作为参数：
- (void)singleTap:(NSIndexPath *)indexPath {
//do your stuff for a single tap
}
- (void)doubleTap:(NSIndexPath *)indexPath {
//do your stuff for a double tap
}
希望能帮助到你
Swift 2的解决方案：
let singleTapGesture = UITapGestureRecognizer(target: self, action: #selector(handleSingleTap))
singleTapGesture.numberOfTapsRequired = 1 // Optional for single tap
view.addGestureRecognizer(singleTapGesture)
let doubleTapGesture = UITapGestureRecognizer(target: self, action: #selector(handleDoubleTap))
doubleTapGesture.numberOfTapsRequired = 2
view.addGestureRecognizer(doubleTapGesture)
singleTapGesture.requireGestureRecognizerToFail(doubleTapGesture)
我实现了UIGestureRecognizerDelegate方法来检测singleTap和doubleTap。
就这样做吧。
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;
}
有些视图内置了自己的双击识别器（MKMapView就是一个例子）。要解决这个问题，你需要实现UIGestureRecognizerDelegate方法shouldRecognizeSimultaneouslyWithGestureRecognizer并返回YES：
首先实现双重和单个识别器：
// 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];
然后执行：
#pragma mark UIGestureRecognizerDelegate
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer
*)otherGestureRecognizer { return YES; }
参考@ stanley的评论 -
不要尝试使用点击手势来排列选择在UITableView工作，因为它已经有完整的点击处理....
但是，您必须在单击手势识别器上将“取消触摸视图”设置为“否”，否则它将永远不会获得点击事件。