通过GPS跟踪用户，ios

Question

我需要通过gps跟踪用户位置。我需要沿路径显示多段线，用户travels.And还需要计算distancs，速度和时间time.Please指导我一些教程。

Answer 1

从下面的委托方法中保留用户的导航位置。

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

通过使用以下委托方法传递叠加视图。

- (MKOverlayView *)mapView:(MKMapView *)mapView viewForOverlay:(id <MKOverlay>)overlay 
{ 
if([overlay class] == MKPolyline.class) 
{ 
    MKOverlayView* overlayView = nil; 
    MKPolyline* polyline = (MKPolyline *)overlay; 
    MKPolylineView * routeLineView = [[MKPolylineView alloc] initWithPolyline:polyline]; 

    routeLineView.fillColor = [UIColor blueColor]; 
    routeLineView.strokeColor = [UIColor blueColor]; 

    routeLineView.lineWidth = 3; 
    routeLineView.lineCap = kCGLineCapSquare; 
    overlayView = routeLineView; 
    return overlayView; 
} else { 
    return nil; 
} 
} 

为了创建多段线，请参阅以下

http://developer.apple.com/library/ios/#documentation/MapKit/Reference/MKPolyline_class/Reference/Reference.html#//apple_ref/doc/c_ref/MKPolyline

问候， 阿伦。