Textfield的rightView上的两个UIButton

Question

我有一个问题，现在仅显示一个按钮。我想要“ Vergessen”吗？除非用户键入内容，否则将显示按钮。在编辑“眼睛”按钮时，应出现。现在只有其中一个显示出来，我不知道为什么。并有一种简单的方法可以更改“眼睛”按钮的大小吗？

func createForgetButton () {
    let button = UIButton(type: .system)
    button.setTitle("Vergessen?", for: .normal)
    button.addTarget(self, action: #selector(self.vergessenTapped(_:)), for: .touchUpInside)
    button.titleLabel?.font = UIFont(name: "Avenir Next", size: 19.0)
    passwordTextField.rightView = button
    passwordTextField.rightViewMode = .unlessEditing

}

func createTogglePassword () {
    let button = UIButton(type: .system)
    button.setBackgroundImage(UIImage(named: "eyeOpen"), for: .normal)
    button.addTarget(self, action: #selector(togglePassword(_:)), for: .touchUpInside)
    passwordTextField.rightView = button
    passwordTextField.rightViewMode = .whileEditing
}

//我的文本字段的子类：

override func rightViewRect(forBounds bounds: CGRect) -> CGRect {
    let offset = -20
    let width  = 125
    let height = 125
    let x = Int(bounds.width) - width - offset
    let y = offset
    let rightViewBounds = CGRect(x: x, y: y, width: width, height: height)
    return rightViewBounds
}