Question

如何让我的自定义圈子叠加作为子视图实时显示当前用户位置？我设法显示我的圆形叠加并进入用户位置的中心，但是当用户移动（gps）时，叠加层保持静止并且不跟随用户。我该如何解决这个问题？提前谢谢..

- (void)viewDidLoad {
[super viewDidLoad];



[self.mapView setRegion:MKCoordinateRegionMake(self.location.coordinate, MKCoordinateSpanMake(0.02, 0.02))];
[self configureOverlay];

[[self locationManager] startUpdatingLocation];

}

在configureOverlay中：

        CircleOverlay *overlay = [[CircleOverlay alloc] initWithCoordinate:self.location.coordinate radius:self.radius];

    [self.mapView addOverlay:overlay];

    GeoQueryAnnotation *annotation = [[GeoQueryAnnotation alloc] initWithCoordinate:self.location.coordinate radius:self.radius];

    [self.mapView addAnnotation:annotation];

我也尝试过使用：

 CLLocation *location = _locationManager.location;

    CLLocationCoordinate2D coordinate = [location coordinate];

并用self.location.coordinate替换坐标

任何建议都将不胜感激。谢谢你

Answer 1

告诉你的课你要实现CLLocationManagerDelegate

@interface YourClass () <CLLocationManagerDelegate>

然后添加以下方法：

    #pragma mark CLLocationManagerDelegate Methods
    - (void)locationManager:(CLLocationManager *)manager
        didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation {
//You can change the overlay coordinates here. Even with an animation if you want.

    }

- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error {
    NSString *errorType = (error.code == kCLErrorDenied) ? @"Access Denied" : @"Unknown Error";
    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Error getting Location"message:errorType delegate:nil cancelButtonTitle:@"Okay" otherButtonTitles:nil];
    [alert show];
}

每次位置管理器检测到用户位置发生变化时，都会触发locationManager：didUpdateToLocation ...方法。

干杯。

修改我忘记了非常重要的事情。在viewDidLoad方法中，将您的类添加为委托：

self.locationmanager.delegate = self;

圆形叠加跟随用户位置

1 个答案: