MapKit用户位置（蓝点和圆圈）不会显示

我不明白为什么当前的位置圈不会出现。我有自定义注释，显示得很好......并且地图被带到用户的当前位置......但是，该圆圈并未出现。MapKit用户位置（蓝点和圆圈）不会显示

这是我的代码。提前致谢！

- (void)viewDidLoad { 
    [super viewDidLoad]; 

locationManager = [[CLLocationManager alloc] init]; 
[locationManager setDelegate:self]; 
[locationManager setDesiredAccuracy:kCLLocationAccuracyBest]; 
[locationManager startUpdatingLocation]; 

[mapView setMapType:MKMapTypeStandard]; 
mapView.showsUserLocation = YES; 

MKCoordinateRegion region = { {0.0, 0.0 }, { 0.0, 0.0 } }; 
region.span.longitudeDelta = 0.005; 
region.span.latitudeDelta = 0.005; 
[mapView setRegion:region animated:YES]; 
[mapView setDelegate:self]; 
} 

- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation { 
    CLLocationCoordinate2D loc = [newLocation coordinate]; 
    [mapView setCenterCoordinate:loc];  
    } 

-(MKAnnotationView *)mapView:(MKMapView *)map viewForAnnotation:(id <MKAnnotation>)annotation { 
    static NSString *AnnotationViewID = @"annotationViewID"; 
    MKAnnotationView *annotationView = (MKAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:AnnotationViewID]; 

    if (annotationView == nil) { 
     annotationView = [[[MKAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:AnnotationViewID] autorelease]; 
     } 

    annotationView.canShowCallout = YES; 

    if ([annotationView.annotation.title isEqualToString:@"One"]) { 
     UIImage *pinImage = [UIImage imageNamed:@"one.png"]; 
     [annotationView setImage:pinImage]; 
    } 

    if ([annotationView.annotation.title isEqualToString:@"Two"]) { 
     UIImage *pinImage = [UIImage imageNamed:@"two.png"]; 
     [annotationView setImage:pinImage]; 
    } 

    annotationView.annotation = annotation; 
     return annotationView; 

    }

来源

2010-12-22 Adam Storr

你的设备或模拟器测试？在模拟器中，用户的位置总是在加利福尼亚州的库比蒂诺。 – ezekielDFM 2010-12-22 20:48:45

显示您的viewForAnnotation方法。 – Anna 2010-12-22 20:55:56

一下添加到viewForAnnotation方法的顶部：

if ([annotation isKindOfClass:[MKUserLocation class]]) 
    return nil; //return nil to use default blue dot view

来源

2010-12-22 21:07:10 Anna

MapKit用户位置（蓝点和圆圈）不会显示

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