iphone - CLLocationManager 正在提供旧位置

Question

在我的标题中放置

CLLocationManager *locationManager;
@property (nonatomic, retain) CLLocationManager *locationManager;  

在我的实现文件中:

- (void)viewDidLoad
{
    self.locationManager = [[[CLLocationManager alloc] init] autorelease];
    self.locationManager.distanceFilter = 50.0f;
    [self.locationManager setDesiredAccuracy:kCLLocationAccuracyNearestTenMeters];
    self.locationManager.delegate = self; 
    [locationManager startUpdatingLocation];
    [super viewDidLoad];
}

然后在委托(delegate)方法中

- (void)locationManager:(CLLocationManager *)manager
    didUpdateToLocation:(CLLocation *)newLocation
           fromLocation:(CLLocation *)oldLocation
{
        NSLog(@"Location: %g,%g", newLocation.coordinate.latitude, newLocation.coordinate.longitude );

}

现在我不断获得旧的纬度和经度值

用谷歌搜索找不到解决方案，我不明白我做错了什么，

请帮忙

Answer 1

您可以使用timestamp过滤太旧的位置更新的位置:

- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation {
    if ([newLocation.timestamp timeIntervalSinceNow] < -60) return; // location is not fresh
    ...
}