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我有一个UIViewController加载地图,上面已经有一堆图钉。让图钉出现没有问题,但是MKMapView当用户第一次到达 mapView 时,我似乎无法执行 setRegion。我已经尝试将代码放入所有可行的方法中,viewDidLoad, viewWillLoad, mapViewWillStartLoadingMap,mapViewDidFinishLoadingMap等,但无济于事。

然而,如果我返回前一个 viewController 然后再次进入包含 mapView 的 viewContoller,它将“缩放”到指定区域。

有没有我不知道的超级秘密方法?不应该调用[mapView setRegion:(...) animated:YES];足以让地图“缩放”/更新以显示所选区域吗?

另外,如果有人知道如何让图钉(我用MKPointAnnotation的是我的)来动画下降以及让地图动画放大,(虽然我都设置为动画......) ,我也会很感激这些信息。

谢谢!

代码:

@implementation FindOnMapMapView
@synthesize mapView;
@synthesize mapViewTabBarItem;
@synthesize results;
@synthesize reverseGeocoder;

    - (void)viewDidLoad
    {
        [super viewDidLoad];

        NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];

        MKCoordinateRegion mapRegion = MKCoordinateRegionMake(CLLocationCoordinate2DMake([defaults doubleForKey:@"latitude"], [defaults doubleForKey:@"longitude"]), MKCoordinateSpanMake(0.744494189288569, 0.744494189288569));

        mapView.region = mapRegion;
        [mapView setRegion:mapRegion animated:YES];



NSMutableArray *annotations = [[NSMutableArray alloc] init];
        for(ThePlace *place in results)
        {
            MKPointAnnotation *addAnnotation = [[MKPointAnnotation alloc] init];

            [addAnnotation setCoordinate:CLLocationCoordinate2DMake(place.latitude, place.longitude)];

            addAnnotation.title = place.placename;
            addAnnotation.subtitle = [NSString stringWithFormat:@"Distance: %@", place.distance];

            [mapView addAnnotation:addAnnotation];

        }

        [self.mapView addAnnotations:annotations ];
    }

    - (void)viewWillAppear:(BOOL)animated
    {
        NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];

        MKCoordinateRegion mapRegion = MKCoordinateRegionMake(CLLocationCoordinate2DMake([defaults doubleForKey:@"latitude"], [defaults doubleForKey:@"longitude"]), MKCoordinateSpanMake(0.744494189288569, 0.744494189288569));
        NSLog(@"Region Coords are: Latitude:%f, Longitude:%f", [defaults doubleForKey:@"latitude"], [defaults doubleForKey:@"longitude"]);
        mapView.region = mapRegion;
        [mapView setRegion:mapRegion animated:YES];
    }
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1 回答 1

0
- (void) viewDidAppear:(BOOL)animated {
    MKCoordinateRegion region = MKCoordinateRegionMakeWithDistance(firstPoint.coordinate, 2000, 2000);
    [mapView setRegion:region animated:YES];
}

这对我有用。

于 2013-02-14T12:28:53.090 回答