我已经为我的项目找到了解决方案，也许它可以帮助某人.

I've found a solution for my project, maybe it can help someone.

我注意到了:

• 在我的登录页面(带有 1 个安全 UITextField)中，键盘是 AZERTY
• 在我的登录页面(带有 2 个安全 UITextField)中，键盘是 QWERTY
• 在我的帐户页面(带有 2 个安全 UITextField)中，键盘是 AZERTY

• in my login page (with 1 secure UITextField), keyboard was AZERTY
• in my signin page (with 2 secure UITextField), keyboards were QWERTY
• in my account page (with 2 secure UITextField), keyboards were AZERTY

在对登录页面和帐户页面进行了一段时间比较之后，我意识到在我的帐户页面中，安全文本字段之前的文本字段是 .numberPad 文本字段.

After a while of comparison between signin and account pages, I've realized that in my account page, the textfield before secure textfield was a .numberPad textfield.

所以在我的登录 xib 文件中，我已将安全文本字段设置为 .numberPad 并在 textFieldDidBeginEditing 中将它们设置为 .default.并在 textFieldDidEndEditing 中再次返回 .numberPad，因为如果没有，键盘会第二次出现在 QWERTY 中.现在，我的安全文本字段位于 AZERTY 中.

So in my login xib file, I've set my secure textfields to .numberPad and I set them to .default in textFieldDidBeginEditing. And back to .numberPad again in textFieldDidEndEditing because if not, keyboards appeared in QWERTY the second time. Now, my secure textfields are in AZERTY.

func textFieldDidBeginEditing(_ textField: UITextField) {
    if ( textField == pwdTextField || textField == pwd2TextField ) {
        textField.keyboardType = .default;
    }
    // do other stuffs
}

func textFieldDidEndEditing(_ textField: UITextField) {
    if ( textField == pwdTextField || textField == pwd2TextField ) {
        textField.keyboardType = .numberPad;
    }
    // do other stuffs
}

@.@