Fix calculating keyboard visibility in case if keyboard height is zero

IdleHandsApps / IHKeyboardAvoiding

IHKeyboardAvoiding is an elegant solution for keeping any UIView visible when the keyboard is being shown - no UIScrollView required!

MIT License

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Closed kolyasev closed 7 years ago

kolyasev commented 8 years ago

CGRectContainsRect returns true if keyboard frame height is zero. So it causes wrong calculation of _isKeyboardVisible variable.

fraserscottmorrison commented 7 years ago

Hi, Ive just rewritten this library in Swift, and applied your PR to the new code