didUpdateToLocation未被调用 [英] didUpdateToLocation is not called

问题描述

我想接收位置更新。
我添加了一个位置委托给头：

@interface AppDelegate：UIResponder< UIApplicationDelegate，CLLocationManagerDelegate>

和以下函数：

   - ）application：（UIApplication *）application didFinishLaunchingWithOptions：（NSDictionary *）launchOptions 
 {
 //初始化位置管理器
 CLLocationManager * locationManager = [[CLLocationManager alloc] init]; 
 locationManager.delegate = self; 
 // [locationManager startMonitoringSignificantLocationChanges]; 
 [locationManager startUpdatingLocation]; 
 
 self.window = [[UIWindow alloc] initWithFrame：[[UIScreen mainScreen] bounds]]; 
 self.viewController = [[ViewController alloc] initWithNibName：@SomeViewControllerbundle：nil]; 
 self.window.rootViewController = self.viewController; 
 [self.window makeKeyAndVisible]; 
 return YES; 
} 
  - （void）locationManager：（CLLocationManager *）manager didFailWithError：（NSError *）error {
 //一些问题
} 
  - ：（CLLocationManager *）manager didUpdateToLocation：（CLLocation *）newLocation fromLocation：（CLLocation *）oldLocation {
 //一些动作
} 
  

但是不会调用 didUpdateToLocation 或 didFailWithError 模拟器和设备上）。

提前感谢，

Luda

PS：这将有助于使您的位置管理器成为一个实例变量，所以它将由方法 - （BOOL）应用程序：（UIApplication *）应用程序didFinishLaunchingWithOptions：（NSDictionary *）launchOptions 完成后保留。

I want to receive location updates. I have added a location delegate to the header:

@interface AppDelegate : UIResponder <UIApplicationDelegate, CLLocationManagerDelegate>

and the following functions:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    //initialize location manager
    CLLocationManager* locationManager = [[CLLocationManager alloc] init];
    locationManager.delegate = self;
    // [locationManager startMonitoringSignificantLocationChanges];
    [locationManager startUpdatingLocation];

    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    self.viewController = [[ViewController alloc] initWithNibName:@"SomeViewController"     bundle:nil];
    self.window.rootViewController = self.viewController;
    [self.window makeKeyAndVisible];
    return YES;
}
- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error{
    //Some problem
}
- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation     *)newLocation fromLocation:(CLLocation *)oldLocation{
    //Some action
}

But neither didUpdateToLocation nor didFailWithError are called (same problem on the simulator and on the device). What am I missing?

Thanks in advance,

Luda

解决方案

Are location services for your application enabled?

P.S: it would help to make your location manager an instance variable so it will be retained by ARC after the method - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions is completed.

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