通過GPS跟蹤用戶，ios

Question

我需要通過gps跟蹤用戶位置。我需要沿路徑顯示多段線，用戶travels.And還需要計算distancs，速度和時間time.Please指導我一些教程。

Answer 1

從下面的委託方法中保留用戶的導航位置。

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

通過使用以下委託方法傳遞疊加視圖。

- (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; 
} 
} 

爲了創建多段線，請參閱以下

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

問候， 阿倫。