2

我想隐藏和显示导航栏，就像照片应用程序中的导航栏一样，但不会丢失 MKMapView 的功能。用户应该仍然能够双击缩放、捏合和缩放，并且能够选择注释。

我试过了：

 UITapGestureRecognizer* tapRec = [[UITapGestureRecognizer alloc] 
                                  initWithTarget:self action:@selector(hideBar:)];
[self.myMKMapView addGestureRecognizer:tapRec];
[tapRec release];

但随后用户无法再选择注释！而且它也隐藏在双击。

有任何想法吗 ？

4

4 回答 4

6

我知道，这几乎已经晚了一年，但我希望有人可以利用它。根据@Cocoanetics 的回答，我是这样做的：

BOOL                mapReceivedDoubleTap;

...

UITapGestureRecognizer *tapGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(didTapMap:)];
[tapGestureRecognizer setDelegate:self];
[_mapView addGestureRecognizer:tapGestureRecognizer];
[tapGestureRecognizer release];

...

// ignore annotations
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch {
    return (![[touch view] isKindOfClass:[MKAnnotationView class]]);
}

// take care of double taps for zoom
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer  shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {

    if([otherGestureRecognizer isKindOfClass:[UITapGestureRecognizer class]]) {
        UITapGestureRecognizer *tr = (UITapGestureRecognizer *)otherGestureRecognizer;
        if(tr.numberOfTapsRequired == 2)
            mapReceivedDoubleTap = YES;
    }

    return NO;
}

- (void)didTapMap:(UITapGestureRecognizer *)tapGestureRecognizer {

    mapReceivedDoubleTap = NO;

    // hide/show on delay
    dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, .2f * NSEC_PER_SEC);
    dispatch_after(popTime, dispatch_get_main_queue(), ^(void){
        if(!mapReceivedDoubleTap)
            [self.navigationController setNavigationBarHidden:!self.navigationController.navigationBarHidden animated:YES];
    });
}

迅速

import MapKit

class MapViewController: UIViewController, UIGestureRecognizerDelegate {

    @IBOutlet weak var myMapView: MKMapView!

    var mapReceivedDoubleTap = false

    override func viewDidLoad() {
        super.viewDidLoad()

        let tapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(MapViewController.didTapMap(_:)))            
        tapGestureRecognizer.delegate = self            
        myMapView.addGestureRecognizer(tapGestureRecognizer)
    }

    // ignore annotations
    func gestureRecognizer(gestureRecognizer: UIGestureRecognizer, shouldReceiveTouch touch: UITouch) -> Bool {
        return !touch.isKindOfClass(MKAnnotationView)
    }

    // take care of double taps for zoom
    func gestureRecognizer(gestureRecognizer: UIGestureRecognizer,
                           shouldRecognizeSimultaneouslyWithGestureRecognizer otherGestureRecognizer: UIGestureRecognizer) -> Bool {

        if otherGestureRecognizer.isKindOfClass(UITapGestureRecognizer) {
            let tr = otherGestureRecognizer as! UITapGestureRecognizer
            if tr.numberOfTapsRequired == 2 {
                mapReceivedDoubleTap = true
            }
        }

        return false
    }

    func didTapMap(gestureRecognizer: UIGestureRecognizer) {

        mapReceivedDoubleTap = false

        // hide/show on delay
        let popTime = dispatch_time(DISPATCH_TIME_NOW, Int64(0.2 * Double(NSEC_PER_SEC)))
        dispatch_after(popTime, dispatch_get_main_queue(), {
            if !self.mapReceivedDoubleTap {
                self.navigationController?.setNavigationBarHidden(!(self.navigationController?.navigationBarHidden)!, animated: true)
            }
        })
    }
}
于 2012-10-03T15:17:08.033 回答
2

您可能需要为此手势识别器实现委托方法，以同时检测为 MKMapView 上的手势识别器。然后，您需要延迟执行隐藏/显示，如果选择了注释，则需要取消此操作。

或者，您可以在委托方法中执行 hitTest，如果命中视图是 MKAnnotationView，则可以防止触摸传递到您的手势。

于 2011-09-09T14:49:49.987 回答
0

只有当地图中的每个手势识别器都失败时，您才能告诉手势识别器触发。

 UITapGestureRecognizer* tapRec = [[UITapGestureRecognizer alloc] 
                                  initWithTarget:self action:@selector(hideBar:)];
for (UIGestureRecognizer recognizer in self.myMKMapView.gestureRecognizers) {
    [tapRec requireGestureRecognizerToFail:recognizer];
}
[self.myMKMapView addGestureRecognizer:tapRec];
[tapRec release];

我不知道它是一个处理注释的手势识别器。估计你得试试。

于 2011-09-09T15:04:02.970 回答
0

您可以使用以下代码防止单击手势识别器窃取双击手势识别器：

self.singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleTap:)];
singleTap.numberOfTapsRequired = 1;
for (UIGestureRecognizer* recognizer in self.mapView.gestureRecognizers) {
    if([recognizer isKindOfClass: [UITapGestureRecognizer class]] && ((UITapGestureRecognizer*)recognizer).numberOfTapsRequired == 2) {
        [singleTap requireGestureRecognizerToFail:recognizer];
    }
}
[self.mapView addGestureRecognizer:self.singleTap];

Can可以防止它以同样的方式窃取其他手势。

于 2011-11-30T22:32:27.910 回答