使用目标 C 在 Xcode 和 iOS 9 中使用 Facebook 登录

Question

我正在尝试创建一个应用程序并使用Facebook Login ，但它总是显示error Auth2 ，请帮助我解决这个问题。

2016-05-03 15:14:36.213 loginFB[631:124818] -canOpenURL: failed for URL: "fbauth2:/" - error: "(null)"
2016-05-03 15:14:36.225 loginFB[631:124818] -canOpenURL: failed for URL: "fbauth2:/" - error: "(null)"
2016-05-03 15:14:36.863 loginFB[631:124818] Warning: Attempt to present <FBSDKContainerViewController: 0x12659bf90> on <ViewController: 0x12655a140> whose view is not in the window hierarchy!

Answer 1

尝试将其添加到您的 .plist 文件中：

    <key>LSApplicationQueriesSchemes</key>
   <array>
    <string>fbapi</string>
    <string>fbapi20130214</string>
    <string>fbapi20130410</string>
    <string>fbapi20130702</string>
    <string>fbapi20131010</string>
    <string>fbapi20131219</string>
    <string>fbapi20140410</string>
    <string>fbapi20140116</string>
    <string>fbapi20150313</string>
    <string>fbapi20150629</string>
    <string>fb-messenger-api</string>
    <string>fbauth2</string>
    <string>fbshareextension</string>
    </array>
<key>LSRequiresIPhoneOS</key>
<true/>
<key>NSAppTransportSecurity</key>
<dict>
    <key>NSExceptionDomains</key>
    <dict>
        <key>akamaihd.net</key>
        <dict>
            <key>NSExceptionRequiresForwardSecrecy</key>
             <false/>
            <key>NSIncludesSubdomains</key>
            <true/>
        </dict>
        <key>facebook.com</key>
        <dict>
            <key>NSExceptionRequiresForwardSecrecy</key>
            <false/>
            <key>NSIncludesSubdomains</key>
            <true/>
        </dict>
        <key>fbcdn.net</key>
        <dict>
            <key>NSExceptionRequiresForwardSecrecy</key>
            <false/>
            <key>NSIncludesSubdomains</key>
            <true/>
        </dict>
    </dict>
</dict>

Answer 2

昨晚与这个问题作斗争，我得到了正确答案

    - (IBAction)loginFBAction:(id)sender{
    UIButton *button=sender;
    if ([button isSelected]) {
        //        [fb facebookLogOut];
        [button setSelected:NO];
    }else{
        FBSDKLoginManager *login = [[FBSDKLoginManager alloc] init];
        [login
         logInWithReadPermissions: @[@"public_profile",@"user_friends",@"email",@"user_birthday"]
         fromViewController:self
         handler:^(FBSDKLoginManagerLoginResult *result, NSError *error) {
             if (error) {
                 NSLog(@"Process error");

             } else if (result.isCancelled) {
                 NSLog(@"Cancelled");

             } else {
                 NSLog(@"Logged in");
                 [self checkUser];
             }
         }];        [button setSelected:YES];
    }
}
- (void)checkUser{
    NSMutableDictionary* parametersDic = [NSMutableDictionary dictionary];
    [parametersDic setValue:@"id, name, email, birthday, picture" forKey:@"fields"];

    FBSDKGraphRequest *request = [[FBSDKGraphRequest alloc]
                                  initWithGraphPath:@"me"
                                  parameters:parametersDic
                                  HTTPMethod:@"GET"];
    [request startWithCompletionHandler:^(FBSDKGraphRequestConnection *connection,
                                          id result,
                                          NSError *error) {
        // Handle the result
        NSLog(@"result %@",result);
        NSString* nameFB = [result objectForKey:@"name"];
        NSString* emailFB = [result objectForKey:@"email"];
    }];
}

这是代码，但您需要确保已从 FB 开发人员页面启用您的应用程序，如果您未启用您的应用程序将无法工作，我将在此处展示该图片

在这里，您看到应用名称的绿灯一侧启用此绿色，您需要转到应用审核选项并像这样公开您的应用

现在您将能够享用您的应用程序并获得 fb 登录的访问权限。