iOS集成Google+登录 iOS集成Google+登录

1. 创建项目
打开Google后台:https://console.developers.google.com/apis，点击左上角My Project,在弹出框点击```新建项目

文章图片
创建项目
接下来申请配置项目参数，在https://developers.google.com/identity/sign-in/ios/start-integrating
中点击Create an OAuth clientID按钮，选择刚才创建的项目，选择平台（iOS），输入项目BundleID，成功之后会提示下载一个plist文件，里面包含了配置参数

文章图片
plist文件
2.Xcode工程配置
在xcode工程的info文件中配置url scheme

文章图片
scheme
URL Schemes参数填plist文件中的REVERSED_CLIENT_ID
3. OC代码
根据需要在合适的地方声明协议：

@import GoogleSignIn; @interface AppDelegate : UIResponder

代码配置参数和代理：

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {[GIDSignIn sharedInstance].clientID = @"YOUR_CLIENT_ID"; [GIDSignIn sharedInstance].delegate = self; return YES; } - (BOOL)application:(UIApplication *)app openURL:(NSURL *)url options:(NSDictionary *)options { return [[GIDSignIn sharedInstance] handleURL:url]; }

在登录回调中处理登录流程：

- (void)signIn:(GIDSignIn *)signIn didSignInForUser:(GIDGoogleUser *)user withError:(NSError *)error { if (error != nil) { if (error.code == kGIDSignInErrorCodeHasNoAuthInKeychain) { NSLog(@"The user has not signed in before or they have since signed out."); } else { NSLog(@"%@", error.localizedDescription); } return; } // Perform any operations on signed in user here. NSString *userId = user.userID; // For client-side use only! NSString *idToken = user.authentication.idToken; // Safe to send to the server NSString *fullName = user.profile.name; NSString *givenName = user.profile.givenName; NSString *familyName = user.profile.familyName; NSString *email = user.profile.email; // ... }- (void)signIn:(GIDSignIn *)signIn didDisconnectWithUser:(GIDGoogleUser *)user withError:(NSError *)error { // Perform any operations when the user disconnects from app here. // ... }

注：如果想要SDK刷新accessToken，可以调用getAccessTokenWithHandler:方法，如果想要刷新accessToken，调用refreshAccessTokenWithHandler:方法。
调用登录：