自定义键盘

////BGKeyBoard.h//BGKeyBoard////CreatedbySH-zhangketaoon15/6/11.//Copyright(c)2015年SH-zhangketao.Allrightsreserved.//#import@classBGKeyBoard;@protocolBGKeyBoardDelegate@required-(void)finished;@optional-(void)calculatorInputView:(BGKeyBoard*)inputViewdi