iphone - MKMapView 在点击时隐藏导航栏，就像在照片应用程序中一样，而不会丢失 MKMapView 的功能

Question

我想像照片应用程序中那样隐藏和显示导航栏但不会丢失 MKMapView 的功能。用户仍然应该能够双击进行缩放、捏合和缩放，并能够选择注释。

我试过:

 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!而且它还会在双击时隐藏。

有什么想法吗？

Answer 1

我知道，这几乎晚了整整一年，但我希望有人可以利用它。根据@Cocoanetics 的回答，这是我的做法:

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];
    });
}

swift

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)
            }
        })
    }
}