在iOS 5中檢測用戶對MKMapView的觸摸

Question

我在ViewController中有一個MKMapView ，並希望在他/她用這些方法觸摸地圖時檢測用戶的手勢：

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event;
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event;
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event;
- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event;

該應用程序適用於iOS 3，iOS 4，但當我在iOS 5上運行iPhone調試應用程序時，我看到此消息：

Pre-iOS 5.0 touch delivery method forwarding relied upon. Forwarding -touchesCancelled:withEvent: to <MKAnnotationContainerView: 0x634790; frame = (0 0; 262144 262144); autoresizesSubviews = NO; layer = <CALayer: 0x634710>>

並且未達到上述4種方法中的代碼。

你知道怎么解決嗎？

謝謝。

Answer 1

某種形式的UIGestureRecognizer可以幫助你。 這是在地圖視圖中使用的點擊識別器的示例; 如果這不是你想要的，請告訴我。

// in viewDidLoad...

// Create map view
MKMapView *mapView = [[MKMapView alloc] initWithFrame:(CGRect){ CGPointZero, 200.f, 200.f }];
[self.view addSubview:mapView];
_mapView = mapView;

// Add tap recognizer, connect it to the view controller
UITapGestureRecognizer *tapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(mapViewTapped:)];
[mapView addGestureRecognizer:tapRecognizer];

// ...

// Handle touch event
- (void)mapViewTapped:(UITapGestureRecognizer *)recognizer
{
    CGPoint pointTappedInMapView = [recognizer locationInView:_mapView];
    CLLocationCoordinate2D geoCoordinatesTapped = [_mapView convertPoint:pointTappedInMapView toCoordinateFromView:_mapView];

    switch (recognizer.state) {
        case UIGestureRecognizerStateBegan:
            /* equivalent to touchesBegan:withEvent: */
            break;

        case UIGestureRecognizerStateChanged:
            /* equivalent to touchesMoved:withEvent: */
            break;

        case UIGestureRecognizerStateEnded:
            /* equivalent to touchesEnded:withEvent: */
            break;

        case UIGestureRecognizerStateCancelled:
            /* equivalent to touchesCancelled:withEvent: */
            break;

        default:
            break;
    }
}