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

Answer 1

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.

Answer 2

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 3

what a pitty that using the same methods you provided there is no way to know if the animation has ended.

Yes I know, there is a CATransaction completion block using this method but it does simply not work! :(

[CATransaction begin];
[CATransaction setValue:[NSNumber numberWithFloat: 1.0f] forKey:kCATransactionAnimationDuration];

[CATransaction setCompletionBlock:^{
// ... whatever you want to do when the animation is complete
}];

[self.googleMapsView animateToCameraPosition:[GMSCameraPosition 
                    cameraWithLatitude:LATITUDE
                             longitude:LONGITUDE
                                  zoom:ZOOM]];

[CATransaction commit];

And I can't use MapView:didIdle hack to know that the animation has ended because it will not be called if there is no camera position change.

Anyone knows how to detect animateon has ended event?

FOUND A THREAD ABOUT THIS (solved): CATransaction completion being called immediately

Answer 4

Swift 2.0

CATransaction.begin()
CATransaction.setValue(NSNumber(float: 1.0), forKey: kCATransactionAnimationDuration)
// change the camera, set the zoom, whatever.  Just make sure to call the animate* method.
CATransaction.commit()