fix #570 Keyboard Hides when sidemenu appears but after closing side menu …

[MichaelHuyp]

fix issue #570

[MichaelHuyp]

@jonkykong
dismiss(animated: flag, completion: completion) will restore the keyboard twice when the sidemenu Closed but transitionController?.handle(state: .finish) not

[jonkykong]

@MichaelHuyp have you tested this on iOS 13 and below? It only seems to produce a change on iOS 14.

[MichaelHuyp]

@jonkykong
Yes, our company uses your framework, Thank you very much for your SideMenu component.
Our QA tested this on iOS 13 and below. The same problem will happen.
The previous interface has a keyboard to open. Then Open the SideMenu and Close. The keyboard will Appeared twice.
After me debug many times, I found this is caused by dismiss(animated: flag, completion: completion)

[jonkykong]

@MichaelHuyp when I test it on iOS 12 simulator I noticed the keyboard will briefly flash when SideMenu is dismissed. There were also strange behaviors that happened when pushing/presenting from SideMenu after the keyboard was showing. I'm not saying that your code caused these issues; but it does not appear to have resolved them. iOS 14 appears smoother when showing/hiding SideMenu, but pushing/presenting still has strange keyboard animations.

[MichaelHuyp]

@jonkykong keyboard will briefly flash when SideMenu is dismissed when call dismiss(animated: flag, completion: completion).But I noticed that the SideMenu is closed by gesture drag, it will not briefly flash. Maybe this code does not appear to have resolved problem, but keyboard will not briefly flash : )