How to hide system controls on AVPictureInPictureController's float window?

I want to hide these system controls on the iOS14 pip：

Any way I can do it?

You can do it with KVC:

1. Hide forward button and back button:

Swift:

pipController.setValue(1, forKey: "requiresLinearPlayback")

Objective-C:

[self.pipController setValue:[NSNumber numberWithInt:1] forKey:@"requiresLinearPlayback"]

2. Hide progress bar, play button, forward button and back button:

Swift:

pipController.setValue(1, forKey: "controlsStyle")

Objective-C:

[self.pipController setValue:[NSNumber numberWithInt:1] forKey:@"controlsStyle"];

3. Hide all the controls on the pip:

Note: iOS16+ only

Swift:

pipController.setValue(2, forKey: "controlsStyle")

Objective-C:

[self.pipController setValue:[NSNumber numberWithInt:2] forKey:@"controlsStyle"];