ios - MKMapView 不在 Pan 上调用 regionDidChangeAnimated

Question

我有一个带有 MKMapView 的应用程序和每次 map 更改位置时调用的代码(在 regionDidChangeAnimated 中)。当应用程序最初加载时，regionDidChangeAnimated 会在显式更新 map 坐标的平移(滑动)、捏合、点击和按钮上被调用。在加载其他 View 并返回到 map 后，regionDidChangeAnimated 仅在点击和明确更新 map 的按钮时被调用。平移 map 和捏合不再调用 regionDidChangeAnimated。

我看过这个stackoverflow post这并没有解决这个问题。论坛发帖devforums和 iphonedevsdk也没有用。有谁知道是什么导致了这个问题？我没有向 MKMapView 添加任何 subview 。

Answer 1

我最初不想这样做，但到目前为止它似乎没有任何问题(摘自有问题的 devforums 帖子):

将 UIGestureRecognizerDelegate 添加到您的标题中。现在添加版本号检查...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(delegate)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;
}