Question

我正在做一个应用程序。我正在使用下面的CLLOcationmanager。

[self performSelectorOnMainThread:@selector(findlocation:) withObject:nil waitUntilDone:NO];

-(void)findlocation:(id)sender
{
//NSAutoreleasePool *pool=[[NSAutoreleasePool alloc]init];
locationManager=[[CLLocationManager alloc]init];
locationManager.delegate=self;
locationManager.distanceFilter=0.3f;
locationManager.desiredAccuracy = kCLLocationAccuracyBest;
[locationManager startUpdatingLocation];

}

   - (void)locationManager:(CLLocationManager *)manager
didUpdateToLocation:(CLLocation *)newLocation
       fromLocation:(CLLocation *)oldLocation
{
    NSLog@"%@",newlocation.timestamp];
}

我想每隔0.3米更新一次位置。但是这个委托方法不会针对该距离触发。在[self performSelectorOnMainThread:@selector(findlocation:) withObject:nil waitUntilDone:NO];我的剩余流程正在运行之后。

Answer 1

我认为这可能会对你有所帮助。您需要使用经度和纬度调整距离

- (void)locationManager:(CLLocationManager *)manager 
    didUpdateToLocation:(CLLocation *)newLocation 
           fromLocation:(CLLocation *)oldLocation {
    MKCoordinateRegion region = { { 0.0f, 0.0f }, { 0.0f, 0.0f } };
    region.center = newLocation.coordinate;
    region.span.longitudeDelta = 0.15f; 
    region.span.latitudeDelta = 0.15f;
    [self.mapView setRegion:region animated:YES];
}

以上代码使用0.15度（0.15 * 111 Km）。

或者尝试使用distanceFilter“。使用distanceFilter可以过滤掉那种无关的动作。

cllocationmanager类位置更新

1 个答案: