我有一个 UIViewController
可以加载一张 map ,上面已经有一堆图钉。让图钉出现没有问题,但我似乎无法让 MKMapView
在用户首次到达 mapView 时执行 setRegion。我已尝试将代码放入所有可行的方法中,viewDidLoad
、viewWillLoad
、mapViewWillStartLoadingMap
、mapViewDidFinishLoadingMap
等,无济于事。
然而,如果我返回到前一个 viewController,然后再次进入包含 mapView 的 viewContoller,它将“缩放”到指定区域。
是否有一种我不知道的 super secret 方法?调用 [mapView setRegion:(...) animated:YES];
是否足以使 map “缩放”/更新以显示所选区域?
此外,如果有人知道如何获取图钉(我正在使用 MKPointAnnotation
)来制作插入动画以及制作 map 动画放大,(两者都没有这样做,尽管我将两者都设置为动画......),但我也很感激该信息。
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];
}
最佳答案
- (void) viewDidAppear:(BOOL)animated {
MKCoordinateRegion region = MKCoordinateRegionMakeWithDistance(firstPoint.coordinate, 2000, 2000);
[mapView setRegion:region animated:YES];
}
这对我有用。
关于iphone - 无法将 UIMapView 获取到 "zoom"/setRegion : when the map is loaded for the first time,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/13017461/