Question

我有一个带有MKMapView的应用程序和每次地图更改位置时调用的代码（在regionDidChangeAnimated中）。应用程序最初加载时，将在显式更新地图坐标的平移（滑动），捏合，点击和按钮上调用regionDidChangeAnimated。加载其他视图并返回到地图后，仅调用tapDidChangeAnimated和显式更新地图的按钮。平移地图并捏不再调用regionDidChangeAnimated。

我看过这个没有解决这个问题的stackoverflow post。 devforums和iphonedevsdk上的论坛帖子也无效。有谁知道这个问题的原因是什么？我没有向MKMapView添加任何子视图。

Answer 1

我最初不想这样做，但到目前为止似乎没有任何问题（取自相关的devforums帖子）：

将UIGestureRecognizerDelegate添加到标题中。现在添加一个版本号的检查...如果我们在iOS 4上，我们可以这样做：

 if (NSFoundationVersionNumber >= 678.58){

      UIPinchGestureRecognizer *pinch = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinchGestureCaptured:)];
      pinch.delegate = self;          
      [mapView addGestureRecognizer:pinch];

      [pinch release];

      UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panGestureCaptured:)];
      pan.delegate = self;
      [mapView addGestureRecognizer:pan];

      [pan release];
 }

添加委托方法来处理手势：

#pragma mark -
#pragma mark Gesture Recognizers

- (void)pinchGestureCaptured:(UIPinchGestureRecognizer*)gesture{
    if(UIGestureRecognizerStateEnded == gesture.state){
         ///////////////////[self doWhatYouWouldDoInRegionDidChangeAnimated];
    }
}

- (void)panGestureCaptured:(UIPanGestureRecognizer*)gesture{

    if(UIGestureRecognizerStateEnded == gesture.state){
        ///////////////////[self doWhatYouWouldDoInRegionDidChangeAnimated];
    }
}

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

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

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

MKMapView未在Pan上调用regionDidChangeAnimated

1 个答案: