iOS Google map - How to know when user begins or stop drag map

Question

I'm developing with Google map SDK 6.1 .I want to know when user begin drag or stop drag the map, I just found 2 delegate function : didChangeCameraPosition and idleAtCameraPosition. Is there a way to catch when user begin or stop drag the map?

Answer 1

To detect if the user dragged the map I think it's better to use this delegate method

Obj-C

- (void)mapView:(GMSMapView *)mapView willMove:(BOOL)gesture 

Swift

func mapView(_ mapView: GMSMapView, willMove gesture: Bool) 

and check whether gesture argument is true or not.

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The didChangeCameraPosition is called, as mentioned, many times but since it's also called by both setting the map center from code and as a result of a gesture you can't really see the difference in that method alone.

Answer 2

Swift 4:

func mapView(_ mapView: GMSMapView, willMove gesture: Bool) {     if (gesture){         print("dragged")     } } 

Answer 3

From the documentation :

- (void) mapView:(GMSMapView *)mapView idleAtCameraPosition:(GMSCameraPosition *)position 

Called when the map becomes idle, after any outstanding gestures or animations have completed (or after the camera has been explicitly set).

So with this delegate you can capture when the user stopped dragging the mapView.

To get notified when the user did start dragging, just use the other delegate you have pointed out:

- (void) mapView:(GMSMapView *)mapView didChangeCameraPosition:(GMSCameraPosition *)position 

Called repeatedly during any animations or gestures on the map (or once, if the camera is explicitly set).

This may not be called for all intermediate camera positions. It is always called for the final position of an animation or gesture.

I'm not sure what is confusing you.