Ios 在iPhone上震动后如何调用DidUpdateLocation

我尝试在用户摇晃iPhone时获取位置更新，我在接收摇晃事件时启用GPS，但我的问题是没有调用didUpdateToLocation方法。有人能告诉我我的代码有什么问题吗

    - (void)viewDidLoad
    {
        [super viewDidLoad];

    }
    - (void)motionBegan:(UIEventSubtype)motion withEvent:(UIEvent *)event
    {
        if(event.type == UIEventSubtypeMotionShake)
        {
            [self first];
        }
    }
- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation {
   // NSLog(@"OldLocation %f %f", oldLocation.coordinate.latitude, oldLocation.coordinate.longitude);
   // NSLog(@"NewLocation %f %f", newLocation.coordinate.latitude, newLocation.coordinate.longitude);

  NSString * currentLat = [NSString stringWithFormat:@"%f",newLocation.coordinate.latitude];
    NSLog(@"currentLat%@",currentLat);
    NSString * currentLong = [NSString stringWithFormat:@"%f",newLocation.coordinate.longitude];
    NSLog(@"currentLong%@",currentLong);
}
-(void)first
{
    locationManager = [[CLLocationManager alloc] init];
    locationManager.delegate = self;
    locationManager.distanceFilter = kCLDistanceFilterNone;
    locationManager.desiredAccuracy = kCLLocationAccuracyBest;
    [locationManager startUpdatingLocation];
    NSLog(@"called");
    [self.view setBackgroundColor:[UIColor greenColor]];
}
- (void)viewDidAppear:(BOOL)animated {
    [super viewDidAppear:animated];
    [self becomeFirstResponder];
}

所以请告诉我一些想法

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提前谢谢

确保位置服务已启用，并且应用程序可以访问位置服务（在iPhone设置->位置服务下）。自iOS 6以来，您使用的方法已被弃用。你应该使用

- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations

为了调试，我建议您也实现以下方法

- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error

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另外，我不确定您的方法中locationManager的范围。你为什么不做（坚强）属性，然后在viewDidLoad中对其进行初始化，并仅在方法中调用startUpdatingLocation

首先调用，，

谢谢回复，我需要在抖动后获得纬度和经度值。因此，请告诉我如何在抖动模拟器或手机时获得纬度和经度值