Controlling Animation Duration in Google Maps for iOS

Question

The documentation for Google Maps for iOS states that:

Call one of several methods that allow you to animate the camera moving to a new location. You can control the duration of the animation with CoreAnimation.

For the life of me, I can't figure out how to control the animation duration. I have tried using UIView animations, like:

    [UIView animateWithDuration: 5 animations:^{          GMSCameraPosition *camera = [self newCamera];         self.mapView.camera = camera;     } completion:^(BOOL finished) {     }]; 

And I have looked at CALayer animations in CoreAnimation. However, I don't know how you would apply a layer animation to the map view.

Can someone point me in the right direction please?

Answer 1

I found the answer ... you can control the animation duration by wrapping one of the animate* methods in a CATransaction, like this:

   [CATransaction begin];    [CATransaction setValue:[NSNumber numberWithFloat: 1.0f] forKey:kCATransactionAnimationDuration];    // change the camera, set the zoom, whatever.  Just make sure to call the animate* method.    [self.mapView animateToCameraPosition: [self newCamera]];    [CATransaction commit]; 

Answer 2

for Swift 3.0:

CATransaction.begin() CATransaction.setValue(1.5, forKey: kCATransactionAnimationDuration) // your camera code goes here, example: // mapView.animate(with: update) CATransaction.commit() 

The bigger the value (1.5 in this case), the slower the animation.