ios - CLLocationCoordinate2D 纬度和经度始终为零

Question

我正在尝试获取纬度和经度。我在实际设备上运行以下代码，但纬度和经度总是为零。我还导入库并设置委托(delegate)。我可以知道哪里出了问题以及该怎么办吗？我的设备有 ios 8。

CLLocationManager *locationManager = [[CLLocationManager alloc] init];

if ([locationManager locationServicesEnabled])
{
    locationManager.delegate = self;
    locationManager.desiredAccuracy = kCLLocationAccuracyBest;
    locationManager.distanceFilter = kCLDistanceFilterNone;
    [locationManager startUpdatingLocation];
}


CLLocation *location = [locationManager location];
CLLocationCoordinate2D coordinate = [location coordinate];

NSString *str=[[NSString alloc] initWithFormat:@" latitude:%f longitude:%f",coordinate.latitude,coordinate.longitude];
NSLog(@"%@",str);

Answer 1

你必须在委托(delegate)方法中获取当前位置

- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
{
    CLLocation *currentLocation = [locations objectAtIndex:0];
}