位置管理器更新频率，iPhone

Question

我有一个名为“myLocation”的 CLLocation 管理器。

myLocation = [[CLLocationManager alloc] init];
    myLocation.desiredAccuracy = kCLLocationAccuracyBestForNavigation ;
    myLocation.distanceFilter = 10 ;
    myLocation.delegate=self;



    locationEnabledBool = [CLLocationManager locationServicesEnabled];



    if (locationEnabledBool ==NO || ( [CLLocationManager  authorizationStatus] == kCLAuthorizationStatusDenied)) {

    //  LocationText.text = @"Location Service Disabled ";
        UIAlertView *locationAlert = [[UIAlertView alloc] initWithTitle:@"Location Service Disabled" 
                                                        message:@"To re-enable, please go to Settings and turn on Location Service for this app." 
                                                       delegate:nil 
                                              cancelButtonTitle:@"OK" 
                                              otherButtonTitles:nil];
        [locationAlert show];
        [locationAlert release];

    }

        [myLocation startUpdatingLocation];

位置更新功能是

- (void)locationManager:(CLLocationManager *)manager
    didUpdateToLocation:(CLLocation *)newLocation
           fromLocation:(CLLocation *)oldLocation
{

NSLog(@"old location is %f, %f ", oldLocation.coordinate.latitude, oldLocation.coordinate.longitude);
NSLog(@"new location is %f,%f",newLocation.coordinate.latitude, newLocation.coordinate.longitude );
}

有没有办法找到位置管理器更新的频率，以及是否可以增加或减少？

Answer 1

仅当您调用方法[locationManager startUpdatingLocation]时，您的位置更新才会开始。

您可以使用 NSTimer 控制更新频率。当您需要位置更新时，定期调用 startUpdatingLocation 方法，然后立即调用 stopUpdatingLocation 方法。下次您将仅按照您在 NSTimer 中设置的时间间隔获取位置更新。

Answer 2

为了检测最轻微的移动，您需要设置

myLocation.distanceFilter = kCLDistanceFilterNone ; 

但是，请记住，让位置管理器为即使最轻微的移动生成更新也可能导致大量电池使用。