iphone - 检测从 iPhone MapView 开始的捏合手势

我们正在为 iPhone 开发基于 map 的应用程序。我们需要检测 MapView 上拖动和捏合手势的开始。

我们能够使用 regionWillChange 委托(delegate)方法检测拖动的开始。我们无法检测到捏合手势的开始。

我们正在寻找一种检测捏合手势开始的方法。在 MapView 上可以吗？

提前致谢。

编辑: 我们尝试了以下代码，但没有成功。

UIPinchGestureRecognizer *pinch = [[UIPinchGestureRecognizer alloc]initWithTarget:self actionselector(checkpinch)]; 
[self.mapView addGestureRecognizer:pinch]; 
[pinch release];

双击手势识别器正在使用类似代码在 MapView 上工作。

UITapGestureRecognizer *Tap= [[UITapGestureRecognizer alloc]initWithTarget:self actionselector(checktap)]; 
[self.mapView addGestureRecognizer:Tap]; 
[Tap release];

---

Best Answer-推荐答案

完美而简单的解决方案。

首先在你的.h文件中添加UIGestureRecognizerDelegate 而不是在你的 .m 文件中添加以下两种方法

    -(BOOL)gestureRecognizerUIGestureRecognizer *)gestureRecognizer shouldReceiveTouchUITouch *)touch
{
    return YES;
}

-(BOOL)gestureRecognizerUIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizerUIGestureRecognizer *)otherGestureRecognizer

{
    return  YES;
}

-(BOOL)gestureRecognizerShouldBeginUIGestureRecognizer *)gestureRecognizer

{
    return  YES;
}

在 viewdidload 中进行以下更改

[self.view insertSubview:mapView atIndex:0];

UIPinchGestureRecognizer *pinch = [[UIPinchGestureRecognizer alloc]initWithTarget:self actionselector(yourmethod)];
[pinch setDelegate:self];
[pinch setDelaysTouchesBegan:YES];
[self.mapView addGestureRecognizer:pinch];
[pinch release];

UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]initWithTarget:self actionselector(youemethod)];
[tap setDelegate:self];
[self.mapView addGestureRecognizer:tap];
[tap release];

关于iphone - 检测从 iPhone MapView 开始的捏合手势，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/8708518/