iOS 6 CoreLocation不起作用

Question

我做了一个位置应用程序.但核心位置不起作用.我在iPhone上测试了其他iPhone应用程序.
像谷歌地球,导航软件.其他应用程序也不起作用.
为什么不更新位置？
为什么'locationManager:didUpdateToLocation:fromLocation:'消息只被调用2次？

也许......我的iPhone崩溃了？或iOS 6 CoreLocation框架有一些错误？

位置服务 - 开启iPhone设置

的Info.plist

• 的ARMv7
• 加速度计
• 位置服务
• 全球定位系统
• 麦克风
• 磁力仪

代码示例:

- (CLLocationManager *)setupLocationManager
{
  if ([CLLocationManager locationServicesEnabled] && [CLLocationManager headingAvailable]) {

     CLLocationManager *locationManager = [[CLLocationManager alloc] init];
     locationManager.delegate = self;
     locationManager.desiredAccuracy = kCLLocationAccuracyBestForNavigation;
     locationManager.distanceFilter = kCLDistanceFilterNone;
     locationManager.headingFilter = kCLHeadingFilterNone;
     [locationManager startUpdatingLocation];
     [locationManager startUpdatingHeading];
     return locationManager;
  }
  return nil;
}

- (CLLocationManager *)locationManager
{
  switch([CLLocationManager authorizationStatus])
  {
    case kCLAuthorizationStatusAuthorized:
      _deltaTimeLocationReceived = 0.0;
      if (_locationManager == nil)
        _locationManager = [self setupLocationManager];
       return _locationManager;

      case kCLAuthorizationStatusDenied:
      case kCLAuthorizationStatusRestricted:
        if (_locationManager)
          _locationManager = nil;
        return _locationManager;

      case kCLAuthorizationStatusNotDetermined:
        _deltaTimeLocationReceived = 0.0;
        if (_locationManager == nil)
          _locationManager = [self setupLocationManager];
        return nil;
    }
    return nil;
}

- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation
{
  NSLog(@"%@ %@", NSStringFromSelector(_cmd), newLocation.description); 
  if (self.locationManager) _locationSignal++;
}

- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error
{
  NSLog(@"%@ %@", NSStringFromSelector(_cmd), error.description);
}

Answer 1

在iOS 6中,Apple通过实施AutoPause API对Core Location进行了重大更改.当应用程序进入后台时,AutoPause API会暂停位置更新,并应用于几个条件(即用户不移动,没有位置修复,用户中断活动).为了准确处理暂停事件Apple请求帮助更好地预测是否暂停位置更新设置活动类型(即导航,健身,其他).在针对iOS 6编译应用程序时,默认情况下会启用AutoPause API.

简单的解决方法是暂时禁用AutoPause API,始终将'pausesLocationUpdatesAutomatically'设置为NO.即使应用程序在后台运行,也会发送位置更新,就像以前在<iOS 6中工作一样.

更多细节在这里:

http://developer.apple.com/library/ios/#documentation/CoreLocation/Reference/CLLocationManager_Class/CLLocationManager/CLLocationManager.html