简易支付密码键盘 纯代码布局，简易实现6位交易密码的输入。 使用步骤：
[[CJPwdKeyBoardManager shareInstance] configKeyBoard:self.view pwdTitle:@"测试密码输入"];
__weak typeof(self) weakSelf = self;
[CJPwdKeyBoardManager shareInstance].verificationBlock = ^(UITextField *tfd){
__strong typeof(weakSelf) strongSelf = weakSelf;
strongSelf.pwdLabel.text = tfd.text;
};
/*
[CJPwdKeyBoardManager shareInstance].ifNeedAnimate = NO;
[[CJPwdKeyBoardManager shareInstance] configRightItem:@"忘记密码" RightItemBlock:^{
NSLog(@"忘记密码");
}];
[[CJPwdKeyBoardManager shareInstance] showKeyBoard];
[[CJPwdKeyBoardManager shareInstance] hiddenKeyBoard];
*/
-------------- 效果图 ---------------
