- (UITextField *)passwordTextField {
    if (nil == _passwordTextField) {
        _passwordTextField = [[UITextField alloc] initWithFrame:CGRectMake(kText_Button_Margin, CGRectGetMaxY(self.userNameTextField.frame)+kText_Button_Height/2, kText_Button_Width, kText_Button_Height)];
        CGRect frame = _passwordTextField.frame;
//设置距离
        frame.size.width = 8;
        UIView *leftview = [[UIView alloc] initWithFrame:frame];
        _passwordTextField.leftViewMode = UITextFieldViewModeAlways;
        _passwordTextField.leftView = leftview;
        
        _passwordTextField.placeholder = NSLocalizedString(@"Password", @"");
        _passwordTextField.layer.borderWidth = kBorder_Width;
        _passwordTextField.layer.borderColor = [UIColor lightGrayColor].CGColor;
        _passwordTextField.layer.cornerRadius = kCornerRadius;
        _passwordTextField.layer.masksToBounds = YES;
        _passwordTextField.delegate = self;
        _passwordTextField.font = [UIFont systemFontOfSize:PxtoPoint_Width(49)];
        _passwordTextField.clearButtonMode = UITextFieldViewModeAlways;
        _passwordTextField.secureTextEntry = YES;
    }
    return _passwordTextField;
}