为旧版 Xcode 集成 Facebook SDK 以支持 iOS 5 和 iOS 6

Question

我仍在使用 XCode 4.3.2 和 iOS 5.1 基础 SDK。我想要实现的是为 iOS 5.0+ 设备集成 Facebook API。只是基本功能，例如代表发帖和获取基本用户信息。

我假设哪个 Facebook SDK 可以在 iOS 5 上运行，也可以在 iOS 6 上运行，但我不确定。

作为 Facebook 集成的新手，任何人都可以对这个问题有所了解。 （由于我正在做这个项目，升级 XCode 和 iOS SDK 不是一个选项）

• 我应该研究哪个 iOS SDK？
• 我可以同时支持 iOS 5 和 6、用基础SDK 5.1和XCode 4.3？
• 是否有支持两个 iOS 版本的 API？
• Facebook 集成有什么要求吗？

Answer 1

首先您阅读了 Facebook 开发人员发布的这篇文章

http://developers.facebook.com/docs/getting-started/facebook-sdk-for-ios/

在第 1 步中，它也适用于 xcode 4.3

你仔细阅读所有步骤n实施

在第 6 步中，您在 Facebook Btn Pressed 的位置编写如下代码

 - (IBAction)facebookBtnPressed:(id)sender
{


        // if it is available to us, we will post using the native dialog
        BOOL displayedNativeDialog = [FBNativeDialogs presentShareDialogModallyFrom:self
                                                                        initialText:[NSString stringWithFormat:@"Here U write code which u want to post on facebook"]
                                                                              image:[UIImage imageNamed:@"1.jpg"]
                                                                                url:[NSURL URLWithString:@""]
                                                                            handler:nil];

        if (!displayedNativeDialog)
        {
            NSString *shareStr = [NSString stringWithFormat:@"Here U write code which u want to post on facebook"];
            NSMutableDictionary* params = [[NSMutableDictionary alloc] initWithObjectsAndKeys:
                                           shareStr,@"description",
                                           @"sharelink", @"link",
                                           @"ImageName", @"picture",
                                           nil];

            [self performPublishAction:^{

                [FBRequestConnection startWithGraphPath:@"me/feed" parameters:params HTTPMethod:@"POST" completionHandler:^(FBRequestConnection *connection, id result, NSError *error) {

                    if (error)
                    {
                        NSLog(@"error in post");
                    }
                    else
                    {
                        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Success" message:@"Post Successfully" delegate:self cancelButtonTitle:@"Ok" otherButtonTitles:nil];
                        [alert show];
                    }

                }];
            }];
        }
    //}

    //===set delagate in Viewcontroller.h of mySLComposerSheet
    [mySLComposerSheet setCompletionHandler:^(SLComposeViewControllerResult result) {
        NSString *output;
        switch (result) {
            case SLComposeViewControllerResultCancelled:
                output = @"Action Cancelled";
                break;
            case SLComposeViewControllerResultDone:
                output = @"Post Successfully";
                break;
            default:
                break;
        } //check if everything worked properly. Give out a message on the state.
        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Facebook" message:output delegate:nil cancelButtonTitle:@"Ok" otherButtonTitles:nil];
        [alert show];
    }];
}

- (void) performPublishAction:(void (^)(void)) action {
    if ([[FBSession activeSession]isOpen]) {
        /*
         * if the current session has no publish permission we need to reauthorize
         */
        if ([[[FBSession activeSession]permissions]indexOfObject:@"publish_actions"] == NSNotFound) {
            [[FBSession activeSession] reauthorizeWithPublishPermissions:[NSArray arrayWithObject:@"publish_actions"]
                                                         defaultAudience:FBSessionDefaultAudienceOnlyMe
                                                       completionHandler:^(FBSession *session, NSError *error) {
                                                           action();
                                                       }];
        }else{
            action();
        }
    }else{
        /*
         * open a new session with publish permission
         */
        [FBSession openActiveSessionWithPublishPermissions:[NSArray arrayWithObject:@"publish_actions"]
                                           defaultAudience:FBSessionDefaultAudienceOnlyMe
                                              allowLoginUI:YES
                                         completionHandler:^(FBSession *session, FBSessionState status, NSError *error) {
                                             if (!error && status == FBSessionStateOpen) {
                                                 action();
                                             }else{
                                                 NSLog(@"error");
                                             }
                                         }];
    }
}