iOS 接入 Google、Facebook 登录（一） - twototwoto/WYW_Blog GitHub Wiki

# pod 'FirebaseUI/Auth', '~> 8.4.1'
pod 'FirebaseUI/Google', '~> 8.4.1'
pod 'FirebaseUI/Facebook', '~> 8.4.1'

pod 'Firebase/Auth', '~> 6.16.0'
pod 'GoogleSignIn', '~> 5.0.2'
pod 'FBSDKLoginKit', '~>6.0.0'

#import <Firebase.h>

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    

	// Firebase 初始化配置
	[FIRApp configure];
	[GIDSignIn sharedInstance].clientID = [FIRApp defaultApp].options.clientID;
    // 其他代码... 
    return YES;
}

- (BOOL)application:(nonnull UIApplication *)application
            openURL:(nonnull NSURL *)url
            options:(nonnull NSDictionary<NSString *, id> *)options {
    
    return [[GIDSignIn sharedInstance] handleURL:url];
}

//  ios(4.2, 9.0)
- (BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(nullable NSString *)sourceApplication annotation:(id)annotation {
    if ([url.absoluteString containsString:[FIRApp defaultApp].options.clientID]) {
        return [[GIDSignIn sharedInstance] handleURL:url];
    }
    return NO;
}

- (void)scene:(UIScene *)scene openURLContexts:(NSSet<UIOpenURLContext *> *)URLContexts  API_AVAILABLE(ios(13.0)){
    
    UIOpenURLContext *openURLContext = URLContexts.allObjects.firstObject;
    if ([openURLContext.URL.absoluteString containsString:[FIRApp defaultApp].options.clientID]) {
        [[GIDSignIn sharedInstance] handleURL:openURLContext.URL];
    }
}

#import <GoogleSignIn/GoogleSignIn.h>

// 遵守代理 <GIDSignInDelegate>

// 设置代理
[GIDSignIn sharedInstance].delegate = self;
// 必须设置 否则会Crash
[GIDSignIn sharedInstance].presentingViewController = self;

// Firebase 封装的 Google 登录按钮
GIDSignInButton *gidSignInBtn = [GIDSignInButton new];
gidSignInBtn.frame = CGRectMake(20.0, 120.0, 100.0, 40.0);
gidSignInBtn.center = self.view.center;
[self.view addSubview:gidSignInBtn];


// 实现代理方法
- (void)signIn:(GIDSignIn *)signIn didSignInForUser:(GIDGoogleUser *)user withError:(NSError *)error {
    
    if (!error) {
        NSLog(@"用户ID：%@", user.userID);
        
        GIDAuthentication *authentication = user.authentication;
        FIRAuthCredential *credential =
        [FIRGoogleAuthProvider credentialWithIDToken:authentication.idToken
                                         accessToken:authentication.accessToken];
        NSLog(@"credential Provider：%@", credential.provider);
        // Firebase 身份验证
        // Summary
        // Asynchronously signs in to Firebase with the given 3rd-party credentials (e.g. a Facebook login Access Token, a Google ID Token/Access Token pair, etc.) and returns additional identity provider data.
        // 三方异步登录Firebase
        [[FIRAuth auth] signInWithCredential:credential completion:^(FIRAuthDataResult * _Nullable authResult, NSError * _Nullable error) {
            if (error) {
                NSLog(@"错误信息：%@", error.debugDescription);
            }
            if (!authResult) {
                NSLog(@"授权结果为空");
                return;
            }
            NSLog(@"Firebase uid：%@", authResult.user.uid);
            
            // 用于获取登录用户 Firebase token 信息交给服务端校验
            [[FIRAuth auth].currentUser getIDTokenWithCompletion:^(NSString * _Nullable token, NSError * _Nullable error) {
                if (error) {
                    
                    NSLog(@"获取当前token出现错误：%@", error);
                    return;
                }
                // Send token to your backend via HTTPS
                NSLog(@"Firebase当前用户 token 信息：%@", token);
           }];
            /**
             * 2020-03-06 20:48:46.859887+0800 FirebaseDemo[95438:3699395] credential Provider：google.com
             * 2020-03-06 20:48:47.914463+0800 FirebaseDemo[95438:3699395] Firebase uid：ma4dqHEO7JZm************QVE3
             * 2020-03-06 21:21:22.486530+0800 FirebaseDemo[95931:3798238] Firebase当前用户 token 信息：eyJhbGciOiJSUzI1NiIsImtpZCI6IjhjZjBjNjQyZDQ.*********4ZTRiZDc5OTkzOTZiNTY3NDAiLCJ0eX*********vbSJ9fQ.pvyaaG2dKKDH4CxO4VGiq_jcwDnmP************gQhHE-j-W
             // 这部分token 信息是 jwt 格式的内容
             */
        }];
    } else {
        NSLog(@"%@", error.debugDescription);
        self.userInfoLabel.text = error.debugDescription;
    }
}

#import <FBSDKLoginKit/FBSDKLoginKit.h>

 // 为了使用 Facebook SDK 应该调用如下方法
[[FBSDKApplicationDelegate sharedInstance] application:application didFinishLaunchingWithOptions:launchOptions];
// 注册 FacebookAppID
[FBSDKSettings setAppID:kFacebookAppID];

- (BOOL)application:(nonnull UIApplication *)application
            openURL:(nonnull NSURL *)url
            options:(nonnull NSDictionary<NSString *, id> *)options {
    
    if (@available(iOS 9.0, *)) {
        return [[FBSDKApplicationDelegate sharedInstance] application:application openURL:url sourceApplication:options[UIApplicationOpenURLOptionsSourceApplicationKey] annotation:options[UIApplicationOpenURLOptionsAnnotationKey]];
    } else {
        // Fallback on earlier versions
    }
}

//  ios(4.2, 9.0)
- (BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(nullable NSString *)sourceApplication annotation:(id)annotation {
    if ([url.absoluteString containsString:kFacebookAppID]) {
        return [[FBSDKApplicationDelegate sharedInstance] application:application openURL:url sourceApplication:sourceApplication annotation:annotation];
    }
    return NO;
}

- (void)scene:(UIScene *)scene openURLContexts:(NSSet<UIOpenURLContext *> *)URLContexts  API_AVAILABLE(ios(13.0)){
    
    UIOpenURLContext *openURLContext = URLContexts.allObjects.firstObject;
    if (openURLContext) {
        if ([openURLContext.URL.absoluteString containsString:kFacebookAppID]) {
             [[FBSDKApplicationDelegate sharedInstance] application:UIApplication.sharedApplication openURL:openURLContext.URL sourceApplication:openURLContext.options.sourceApplication annotation:openURLContext.options.annotation];
            return;
        }
    }
}

#import "FBSDKLoginKit.h"

// 遵守代理 <FBSDKLoginButtonDelegate>

// Firebase 封装的Facebook 登录按钮
FBSDKLoginButton *fbLoginBtn = [FBSDKLoginButton new];
fbLoginBtn.frame = CGRectMake(20.0, 100.0, 120.0, 40.0);
fbLoginBtn.center = self.view.center;
fbLoginBtn.delegate = self;
[self.view addSubview:fbLoginBtn];

// FBSDKLoginButtonDelegate 代理方法
- (void)loginButton:(FBSDKLoginButton *)loginButton didCompleteWithResult:(FBSDKLoginManagerLoginResult *)result error:(NSError *)error {
    
    if (error) {
        NSLog(@"错误信息：%@", error);
    } else {
        FIRAuthCredential *credential =
        [FIRFacebookAuthProvider credentialWithAccessToken:result.token.tokenString];
        NSLog(@"credential Provider：%@", credential.provider);
        // Firebase 身份验证
        // Summary
        // Asynchronously signs in to Firebase with the given 3rd-party credentials (e.g. a Facebook login Access Token, a Google ID Token/Access Token pair, etc.) and returns additional identity provider data.
        // 三方异步登录Firebase
        [[FIRAuth auth] signInWithCredential:credential completion:^(FIRAuthDataResult * _Nullable authResult, NSError * _Nullable error) {
            if (error) {
                NSLog(@"错误信息：%@", error.debugDescription);
            }
            if (!authResult) {
                NSLog(@"授权结果为空");
                return;
            }
            NSLog(@"Firebase uid：%@", authResult.user.uid);
            
            
            
            /**
             * 2020-03-06 20:35:42.995671+0800 FirebaseDemo[95438:3699395] token信息：<FBSDKAccessToken: 0x600001bf6580>
             * 2020-03-06 20:35:45.301482+0800 FirebaseDemo[95438:3699395] Firebase uid：X8U372A8****************s3s1
             * 2020-03-06 21:22:49.582470+0800 FirebaseDemo[95931:3798238] Firebase当前用户 token 信息：eyJhbGc*******************************************************AiLCJ0eXAiOiJKV1QifQ.eyJuYW1lIjoi546L5rC45pe6IiwicGljdHVyZSI6Imh0dHBzOi8vZ3JhcGguZmFjZWJvb2suY29tLzEwMTAyNzQ5NDgxOTk4My9wa*******************************************************2tlbi5nb29nbGUuY29tL2Zpci1kZW1vLThkZj*******************************************************DM1MDA5NjgsInVzZXJfaWQiOiJYOFUzNzJBOG*******************************************************nlCdzNnS01nMXZ6czNzMSIsImlhdCI6MTU4MzUwMDk2OCwiZXhwIjoxNTgzNTA0NTY4LCJmaXJlYmFzZSI6eyJpZGVudGl0aWVzIjp7ImZhY2Vib29rLmNvbSI6WyIxMDEwMjc0OTQ4MTk5ODMiXX0sInNpZ25faW5fcHJvdmlkZXIiOiJmYWNlYm9vay5jb20ifX0.VuhMUV_hr9Bc0Alrv2MS1X*******************************************************omeMXd5ebEe_FtKXEvSppDV8TN66p-*******************************************************lZpe-*******************************************************f-fyZ0lEK-p0PWB96WMKKY7jeVvPo_LR89u88kvjf7C-*******************************************************TWJmEYCMLqqtw9A
             */
            // 这部分token 信息是 jwt 格式的内容
        }];
        NSLog(@"token信息：%@", result.token);
        self.userInfoLabel.text = [NSString stringWithFormat:@"token信息：%@", result.token.tokenString];
        
    }
}

// 当点击 Facebook Log out 按钮的时候会调用这个代理方法
- (void)loginButtonDidLogOut:(FBSDKLoginButton *)loginButton {
    
    NSLog(@"退出登录");
}