iOS 谷歌驱动器 API。操作无法完成。 (com.google.GTMOAuth2 错误 -1000。)

Question

所以一切正常，我喜欢这个 sdk，但是当我推送 auth Controller 时:

GTMOAuth2ViewControllerTouch *authController;
    authController = [[GTMOAuth2ViewControllerTouch alloc] initWithScope:kGTLAuthScopeDrive
                                                                clientID:kClientID
                                                            clientSecret:kClientSecret
                                                        keychainItemName:kKeychainItemName
                                                                delegate:self
                                                        finishedSelector:@selector(viewController:finishedWithAuth:error:)];

    [self.navigationController pushViewController:authController animated:YES];

然后在不输入用户电子邮件和密码的情况下返回委托(delegate)回调返回错误:

The operation couldn’t be completed. (com.google.GTMOAuth2 error -1000.)

但是我不确定代理是否应该为我返回这个错误。我使用了快速入门示例。

我的问题是它为什么返回错误，这是正确的吗？因为我只是从 auth Controller 弹出回到以前的 Controller ，所以没有任何犯罪行为，我不想处理任何 api 调用。

Answer 1

当窗口过早关闭时，委托(delegate)方法在 NSError 参数中返回错误代码 -1000。

这个error.code (-1000) 没什么好担心的，它可以让你看到用户做了什么。如果他们确实在未经授权的情况下返回，您可能需要显示一条消息“您没有授权，您应该使用我们的 Google 强大功能!”，或者您可以简单地忽略它。。。 p>

---

来自:/Project/Pods/gtm-oauth2/GTMOAuth2Authentication.h

enum {
  // Error code indicating that the window was prematurely closed
  kGTMOAuth2ErrorWindowClosed          = -1000,
  kGTMOAuth2ErrorAuthorizationFailed   = -1001,
  kGTMOAuth2ErrorTokenExpired          = -1002,
  kGTMOAuth2ErrorTokenUnavailable      = -1003,
  kGTMOAuth2ErrorUnauthorizableRequest = -1004
};

---

复制粘贴示例:

适用于新 iOS 开发人员的简单示例。 ( Google's documentation is also fantastic )
使用(例如:子集 /Drive)通过 CocoaPods 安装 Google API:

pod 'Google-API-Client/Drive'

在您的 View Controller 中，添加以下变量:

// access keys (Should be in a seperate class or constants file)
#define kKeychainItemName @"Google Drive Quickstart"
#define kGDClientID @"your-client-id"
#define kGDClientSecret @"your-client-secret"

@interface ClassViewController() {
    GTMOAuth2ViewControllerTouch *_authController;           // Auth v/c
    YourCustomGoogleDriveController *_googleDriveController; // Custom Class
}

接下来我们需要一个方法来创建和返回我们的 Google OAuth2 View Controller，将其添加到同一个类中。

/**
 * Create a new instance of our google auth view controller
 */
- (GTMOAuth2ViewControllerTouch *)createAuthController
{
    _authController = [[GTMOAuth2ViewControllerTouch alloc] initWithScope:kGTLAuthScopeDrive
                                                                 clientID:kClientID
                                                             clientSecret:kClientSecret
                                                         keychainItemName:kKeychainItemName
                                                                 delegate:self
                                                         finishedSelector:@selector(viewController:finishedWithAuth:error:)];
    return _authController;
}

当上面的委托(delegate)方法完成后，它会调用下面的函数(注意上面函数中的delegate: self和@selector)。

/**
 * Our delegate method, always called, either with auth token or error
 */
- (void)viewController:(GTMOAuth2ViewControllerTouch *)viewController 
      finishedWithAuth:(GTMOAuth2Authentication *)authResult
                 error:(NSError *)error
{
    if (error != nil) {
        // We have some sort of error, handle it or ignore
        _googleDriveController.driveService.authorizer = nil;
        switch (error.code) {
            case kGTMOAuth2ErrorWindowClosed:
                // Show a message? : "Sign in for awesomeness!"
                NSLog(@"%ld: User closed window prematurely", (long)error.code);
                break;
            case kGTMOAuth2ErrorAuthorizationFailed:
                NSLog(@"%ld: Authorization Failed", (long)error.code);
                break;
            case kGTMOAuth2ErrorTokenExpired:
                NSLog(@"%ld: Token Expired", (long)error.code);
                break;
            case kGTMOAuth2ErrorTokenUnavailable:
                NSLog(@"%ld: Token Unavailable", (long)error.code);
                break;
            case kGTMOAuth2ErrorUnauthorizableRequest:
                NSLog(@"%ld: Unauthorizable Request", (long)error.code);
                break;
            default:
                break;
        }
    } else {
        // Set the result into our `GTLServiceDrive` in our Custom Controller
        _googleDriveController.driveService.authorizer = authResult;
        NSLog(@"Success! - User Auth'ed!");
    }
}

最后我们需要一个 IBAction 或其他东西来调用我们上面的代码:

/**
 * Create our auth controller, and push it to the nav stack (assuming we are in one)
 */
- (IBAction)someButtonClicked:(id)sender
{
    [self createAuthController]; // Init our auth controller
    _authController.title = @"Sign in"; // Set a custom title (if you want)
    [self.navigationController pushViewController:_authController animated:YES];
    //[self presentViewController:controller animated:YES completion:nil]; // Show Modally
}