这段代码不是在设备上工作，而是在simultor上？任何想法，我认为我有3Gs

Question

我想在我的应用程序中嵌入指南针可以任何人帮助我PLZ

- (void)viewDidLoad {

    locationManager=[[CLLocationManager alloc] init];
    locationManager.desiredAccuracy = kCLLocationAccuracyBest;
    locationManager.delegate=self;
    //Start the compass updates.
    //[self.locationManager startUpdatingHeading];
    [[self locationManager] startUpdatingHeading];

    [super viewDidLoad];
}

- (void)locationManager:(CLLocationManager *)manager didUpdateHeading:(CLHeading *)newHeading
{
    NSLog(@"New magnetic heading: %f", newHeading.magneticHeading);
    NSLog(@"New true heading: %f", newHeading.trueHeading);
}

此代码无法在设备上运行，它只在模拟器上运行???任何想法???

Answer 1

使用Core Location

搜索指南针的文档并不难......