iPhone: Detecting Tap in MKMapView

问题:

How do I detect a single tap on an instance of MKMapView? Do I have to subclass MKMapView and then override the touchesEnded method?

Thanks,

-Chris

回答1:

Hope this will help : How to intercept touches events on a MKMapView or UIWebView objects?

回答2:

If you're just looking to get notified of tap gestures without affecting any of the other touch behavior of the map, you'll want to use a UITapGestureRecognizer. It's super simple, just put in some code like this.

UITapGestureRecognizer* tapRec = [[UITapGestureRecognizer alloc] 
   initWithTarget:self action:@selector(didTapMap:)];
[theMKMapView addGestureRecognizer:tapRec];
[tapRec release];

That will call the didTapMap whenever theMKMapView receives a tap gesture and all the pinching, and dragging gestures will still work as they did before.

回答3:

Working Perfectly on iOS 8

- (void)viewDidLoad 
    {
        [super viewDidLoad];

        UITapGestureRecognizer *doubleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:nil];
        doubleTap.numberOfTapsRequired = 2;
        doubleTap.numberOfTouchesRequired = 1;
        [self.mapView addGestureRecognizer:doubleTap];

        UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleGesture:)];
        singleTap.numberOfTapsRequired = 1;
        singleTap.numberOfTouchesRequired = 1;
        [singleTap requireGestureRecognizerToFail: doubleTap];
        [self.mapView addGestureRecognizer:singleTap];
     }

   - (void)handleGesture:(UIGestureRecognizer *)gestureRecognizer
     {
            if (gestureRecognizer.state != UIGestureRecognizerStateEnded)
                return;
            //Do your work ...
     }

回答4:

Or depending on what you are trying to do, add an MKAnnotation (push pin, with a callout), so you have something to tap on - and then your map delegate will receive an event eg.

mapView:(MKMapView *)mapView annotationView:(MKAnnotationView *)view calloutAccessoryControlTapped:(UIControl *)control

回答5:

You cant at this time intercept touches on a map view, you can try layering an opaque view on there and see if it picks up touches...

回答6:

Just add some code snippet as illustration of @tt-kilew answer. In my case, I want to point the user to itself on the map but do not want to interrupt his drag touch.

@interface PrettyViewController () <MKMapViewDelegate>

@property (weak, nonatomic) IBOutlet MKMapView *mapView;
@property (assign, nonatomic) BOOL userTouchTheMap;

@end

@implementation PrettyViewController

#pragma mark - UIResponder

- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
    [super touchesBegan:touches withEvent:event];

    self.userTouchTheMap = [[touches anyObject].view isEqual:self.mapView];
}


#pragma mark - MKMapViewDelegate

- (void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation {
    //We just positioning to user
    if (!self.userTouchTheMap) {
        CLLocationDistance radius = 5000;
        [self.mapView setRegion:MKCoordinateRegionMakeWithDistance(userLocation.location.coordinate, 2*radius, 2*radius) animated:YES];
    }
}

@end

回答7:

Nothing I ever found worked, but I came up with this unperfect solution : In viewDidLoad

let singleTapRecognizer = UITapGestureRecognizer(target: self, action: #selector(onMapClicked))
singleTapRecognizer.delegate = self
mapView.addGestureRecognizer(singleTapRecognizer)

In delegate :

func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldReceive touch: UITouch) -> Bool {
    return touch.view!.frame.equalTo(mapView.frame)
}