Support for iOS7+.

• Pop ViewController with pan gesture from middle or edge of screen.
• It's useable with setting the leftBarButtonItem property of UIViewController

Tips:
The libirary uses a unpublish api(not private). But it's ok in my experience. My app has been approved.

My library does not seek any reward, but if you use this library, tell me if you like. :)

- (BOOL)application:(UIApplication *)application willFinishLaunchingWithOptions:(nullable NSDictionary *)launchOption{
[MLTransition validatePanBackWithMLTransitionGestureRecognizerType:MLTransitionGestureRecognizerTypePan];//or MLTransitionGestureRecognizerTypeScreenEdgePan
//...
return YES;
}