通过 objective-c 获取 gmail api 的访问令牌

Question

我使用了 this sample 中的代码。要获取用户未读消息的数量（这就是我需要的），我需要发送此 GET 请求

https://www.googleapis.com/gmail/v1/users/me/labels/UNREAD?key={MY_API_KEY}

喜欢 this example. But I guess that the {ACCESS_TOKEN} should be here instead of {MY_API_KEY}. If so, could anybody tell me how to get the access token using AFNetworking or auth from the sample?

Answer 1

如 Authorizing Your App with Gmail

中所述

Gmail uses the OAuth 2.0 protocol for authenticating a Google account and authorizing access to user data. You can also use Google+ Sign-in to provide a "sign-in with Google" authentication method for your app.

如果您仍然喜欢按要求使用 AFNetworking，您可以使用此 GitHub post - AFOAuth2Manager.[=14 中有关如何获取访问令牌的指南=]

此 SO post 中给出的解决方案 - How to get the number of unread threads in INBOX with Gmail API 也可能有帮助。

Answer 2

要获取访问令牌以向 Google API 发出授权请求，您应该实施以下方法：

- (GTMOAuth2ViewControllerTouch *)createAuthController {
GTMOAuth2ViewControllerTouch *authController;
// If modifying these scopes, delete your previously saved credentials by
// resetting the iOS simulator or uninstall the app.
NSArray *scopes = [NSArray arrayWithObjects:kGTLAuthScopeGmailReadonly, nil];
authController = [[GTMOAuth2ViewControllerTouch alloc]
                  initWithScope:[scopes componentsJoinedByString:@" "]
                  clientID:kClientID
                  clientSecret:nil
                  keychainItemName:kKeychainItemName
                  delegate:self
                  finishedSelector:@selector(viewController:finishedWithAuth:error:)];
return authController;
}


- (void)viewController:(GTMOAuth2ViewControllerTouch *)viewController
  finishedWithAuth:(GTMOAuth2Authentication *)authResult
             error:(NSError *)error {
if (error != nil) {
   ...
}
else {
    NSLog(@"Access token: %@", authResult.accessToken);

 }
}

您的 ViewDidAppear 方法应如下所示：

- (void)viewDidAppear:(BOOL)animated {
if (!self.service.authorizer.canAuthorize) {
    // Not yet authorized, request authorization by pushing the login UI onto the UI stack.
    [self presentViewController:[self createAuthController] animated:YES completion:nil];
}

该代码输出目标访问令牌。

通过 objective-c 获取 gmail api 的访问令牌

Get access token for gmail api via objective-c

gmail

objective-c

ios

afnetworking

gmail-api