Geek asks and answers

Custom Annotation View in the Google Maps SDK

I created a map-based iOS application in which I thought of using the Google Maps SDK for iOS instead of Mapkit, I found documentation, but I did not find methods related to custom annotation presentation, could someone provide me with a solution on how to create user annotation view (information window) and how to add content for it (name, fragment).

+3
source share
2 answers

If you check out GMSMapView.h in GoogleMaps.Framework, you can see the method described below, which should allow you to add a custom infowindow for the marker instead of using only the standard title and snippet:

: (op) say annotationView = infoWindow
: annotationView = calloutView = infoWindow

/**
 * Called when a marker is about to become selected, and provides an optional
 * custom info window to use for that marker if this method returns a UIView.
 * If you change this view after this method is called, those changes will not
 * necessarily be reflected in the rendered version.
 *
 * The returned UIView must not have bounds greater than 500 points on either
 * dimension.  As there is only one info window shown at any time, the returned
 * view may be reused between other info windows.
 *
 * @return The custom info window for the specified marker, or nil for default
 */
- (UIView *)mapView:(GMSMapView *)mapView
    markerInfoWindow:(id<GMSMarker>)marker;
+8

y'all, , Google UIView . SMCalloutView Ryan Maxwell, .

Google Maps SDK v1.8.1, 2014 10 .

Default SMCalloutView on Google Maps

:

#import <SMCalloutView/SMCalloutView.h>

static const CGFloat CalloutYOffset = 10.0f;

@interface ViewController ()
@property (strong, nonatomic) SMCalloutView *calloutView;
@property (strong, nonatomic) UIView *emptyCalloutView;
@end

SMCalloutView, , UIView:

- (void)viewDidLoad
{
    /* all your other view init, settings, etc... */

    self.calloutView = [[SMCalloutView alloc] init];
    self.calloutView.hidden = YES;

    UIButton *button = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
    [button addTarget:self
               action:@selector(calloutAccessoryButtonTapped:)
     forControlEvents:UIControlEventTouchUpInside];
    self.calloutView.rightAccessoryView = button;

    self.emptyCalloutView = [[UIView alloc] initWithFrame:CGRectZero];
}

UIView, SDK Maps, SMCalloutView. .

:

#pragma mark - GMSMapViewDelegate

- (UIView *)mapView:(GMSMapView *)mapView markerInfoWindow:(GMSMarker *)marker {
    CLLocationCoordinate2D anchor = marker.position;

    CGPoint point = [mapView.projection pointForCoordinate:anchor];

    self.calloutView.title = marker.title;

    self.calloutView.calloutOffset = CGPointMake(0, -CalloutYOffset);

    self.calloutView.hidden = NO;

    CGRect calloutRect = CGRectZero;
    calloutRect.origin = point;
    calloutRect.size = CGSizeZero;

    [self.calloutView presentCalloutFromRect:calloutRect
                                      inView:mapView
                           constrainedToView:mapView
                                    animated:YES];

    return self.emptyCalloutView;
}

- (void)mapView:(GMSMapView *)pMapView didChangeCameraPosition:(GMSCameraPosition *)position {
    /* move callout with map drag */
    if (pMapView.selectedMarker != nil && !self.calloutView.hidden) {
        CLLocationCoordinate2D anchor = [pMapView.selectedMarker position];

        CGPoint arrowPt = self.calloutView.backgroundView.arrowPoint;

        CGPoint pt = [pMapView.projection pointForCoordinate:anchor];
        pt.x -= arrowPt.x;
        pt.y -= arrowPt.y + CalloutYOffset;

        self.calloutView.frame = (CGRect) {.origin = pt, .size = self.calloutView.frame.size };
    } else {
        self.calloutView.hidden = YES;
    }
}

- (void)mapView:(GMSMapView *)mapView didTapAtCoordinate:(CLLocationCoordinate2D)coordinate {
    self.calloutView.hidden = YES;
}

- (BOOL)mapView:(GMSMapView *)mapView didTapMarker:(GMSMarker *)marker {
    /* don't move map camera to center marker on tap */
    mapView.selectedMarker = marker;
    return YES;
}

, :

- (void)calloutAccessoryButtonTapped:(id)sender {
    if (mapView_.selectedMarker) {
        GMSMarker *marker = mapView_.selectedMarker;
        //NSDictionary *userData = marker.userData;

        UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:marker.title
                                                            message:marker.snippet
                                                           delegate:nil
                                                  cancelButtonTitle:@"OK"
                                                  otherButtonTitles:nil];
        [alertView show];
    }
}

, , ViewController (.h) GMSMapViewDelegate:

@interface ViewController : UIViewController <GMSMapViewDelegate>

. xcode . .

+11

More articles:


All Articles