Xamarin Firebase PhoneAuth

Question

我需要创建一个具有 Firebase 电话身份验证的 Xamarin 应用（不是表单，而是分离的 iOS 和 Android 项目）。大多数文档表明支持 Facebook Auth，但我也需要 PhoneAuth。

我找到了 Xamarin.Firebase.Auth，显然它支持它，但我无法实现它，也没有看到任何关于我应该使用哪个接口的文档。

Answer 1

Android 和 iOS 都需要在 Firebase 控制台和平台特定的应用程序设置中进行设置，因此Google Firebase 身份验证文档是必读的，并且用户需要根据您的应用程序了解手机使用情况/费用各个国家/地区的分发法律要求（在 Firebase 文档中注明...），iOS 需要 APN 通知设置等...

Android 通过Xamarin.Firebase.Auth 示例：

文档：https://firebase.google.com/docs/auth/android/phone-auth

PhoneAuthCallbacks phoneAuthCallbacks = new PhoneAuthCallbacks();
PhoneAuthProvider.Instance.VerifyPhoneNumber("555-555-5555", 60, TimeUnit.Seconds, this, phoneAuthCallbacks);
// You can now obtain a user credential via the verification code and verification ID and 

// 通过凭据登录用户（参见 OnVerificationStateChangedCallbacks）

PhoneAuthProvider.OnVerificationStateChangedCallbacks 类示例：

public class PhoneAuthCallbacks : PhoneAuthProvider.OnVerificationStateChangedCallbacks
{
    public override void OnVerificationCompleted(PhoneAuthCredential credential)
    {
        // This callback will be invoked in two situations:
        // 1 - Instant verification. In some cases the phone number can be instantly
        //     verified without needing to send or enter a verification code.
        // 2 - Auto-retrieval. On some devices Google Play services can automatically
        //     detect the incoming verification SMS and perform verification without
        //     user action.         
    }

    public override void OnVerificationFailed(FirebaseException exception)
    {
        // This callback is invoked in an invalid request for verification is made,
        // for instance if the the phone number format is not valid.
    }

    public override void OnCodeSent(string verificationId, PhoneAuthProvider.ForceResendingToken forceResendingToken)
    {
        // The SMS verification code has been sent to the provided phone number, we
        // now need to ask the user to enter the code and then construct a credential
        // by combining the code with a verification ID.
        base.OnCodeSent(verificationId, forceResendingToken);
    }
}

iOS 通过Xamarin.Firebase.iOS.Auth 示例：

文档：https://firebase.google.com/docs/auth/ios/phone-auth

var verificationID = await PhoneAuthProvider.DefaultInstance.VerifyPhoneNumberAsync("555-555-5555", null);
// You can now obtain a user credential via the verification code and verification ID.
// Now you can sign the user in via the credential