RuriTextField has weird jump when pop a view controller in navigation controller

[JasonHanJC]

Hi,

I am using your textfield with RuriTextField style.
I found a weird jump animation with RuriTextField when I pop my viewcontroller in navigation controller.
It seems like every time the view controller appears, the RuriTextField will triger "didBeginEditing" if the textfield is not empty.
Can your check it out?