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];
}