用MMNumberKeyboard 自定义键盘的时候，输入不了。

[Tony-Day]

• (UITextField *)textField { if (!_textField) {

    _textField = [[JJCTextField alloc] initWithFrame:self.bounds];
    _textField.backgroundColor = [UIColor clearColor];
    _textField.delegate = self;
    _textField.textColor = [UIColor clearColor];
    _textField.tintColor = [UIColor clearColor];
  

// _textField.keyboardType = UIKeyboardTypeASCIICapable; [self addSubview:_textField]; MMNumberKeyboard *keyboard = [[MMNumberKeyboard alloc] initWithFrame:CGRectZero]; _textField.inputView = keyboard; } return _textField; }