发布分数到Facebook [英] Posting score to facebook

问题描述

我在 SpriteKit 与xcode中创建了一个应用程序，当游戏结束时，它显示您的分数，我想添加功能将您的分数发布到Facebook 。几乎所有的代码都在 MyScene.m 中无法访问 presentViewController 。只有我的ViewController.m文件才能访问，所以我尝试从Myscene.m调用ViewController中的一个实例方法，但是找不到一个方法。我发现从其他文件调用方法的唯一方法是使用我认为的类方法 +（void）。

Myscene.m：

  if（location.x& 315&& location.x> 261&&  location.y< 404&&& location.y> 361）{
 //如果你点击发布到Facebook按钮（btw，位置是您在屏幕上轻拍的位置的变量）
 
 [ViewController facebook]; 
} 
  

ViewController.m：

如果（[SLComposeViewController isAvailableForServiceType：SLServiceTypeFacebook]）{
SLComposeViewController * facebook = [[SLComposeViewController alloc] init ]。
facebook = [SLComposeViewController composeViewControllerForServiceType：SLServiceTypeFacebook];

[facebook setInitialText：@initial text];
}

}

Facebook类方法正确，但是当我在setInitialText括号后面放了 [self presentViewController：facebook animated：YES] ，它给了我这个错误：没有已知的类方法为选择器' presentViewController：animated：'

顺便说一下，我可以在实例方法中使用 presentViewController ，但是我不能从类方法或从我的Myscene文件中调用该方法。有没有办法从另一个文件调用实例方法，或从类方法访问 presentViewController ？谢谢

解决方案

您可以将View Controller的参考资料传递给SKScene，也可以使用 NSNotificationCenter 我更喜欢使用后者。

首先确保您已将Social.framework添加到您的项目。

将社会框架导入您的View Controller #import< Social / Social.h>

然后在你的View Controller的viewDidLoad方法添加以下代码：

  [[NSNotificationCenter defaultCenter] addObserver：self 
 selector：@selector（createPost :) 
名称：@CreatePost
对象：nil]; 
  

下一步将此方法添加到您的View Controller：

   - （void）createPost：（NSNotification *）通知
 {
 NSDictionary * postData = [notification userInfo]; 
 NSString * postText =（NSString *）[postData objectForKey：@postText]; 
 NSLog（@％@，postText）; 
 
 //构建您的推文，Facebook等... 
 SLComposeViewController * mySLComposerSheet = [SLComposeViewController composeViewControllerForServiceType：SLServiceTypeFacebook]; 
 [self presentViewController：mySLComposerSheet animated：YES completion：nil]; 
 
} 
  

在SKScene的适当位置，（赢得游戏，丢失的游戏等）添加以下代码：

  NSString * postText = @我只是打败了最后一个级别。 ; 
 NSDictionary * userInfo = [NSDictionary dictionaryWithObject：postText forKey：@postText]; 
 [[NSNotificationCenter defaultCenter] postNotificationName：@CreatePost对象：self userInfo：userInfo]; 
  

上述代码发送了一个NSNotification，带有文本，您的View Controller将会接收并执行指定的方法。

I created an app in SpriteKit with xcode where when the game is over, it shows you your score, and I want to add the feature to post your score to facebook. Pretty much all my code is in MyScene.m where it can't access presentViewController. Only my ViewController.m file can access that, so I tried calling a instance method in Viewcontroller from Myscene.m but I can't find a way to do that. The only way I have found calling methods from other files is using +(void) which is a class method I think.

Myscene.m:

    if (location.x < 315 && location.x > 261 && location.y < 404 && location.y > 361) {
 //if you click the post to facebook button (btw, location is a variable for where you tapped on the screen)

     [ViewController facebook];
                    }

ViewController.m:

+(void)facebook{

    if ([SLComposeViewController isAvailableForServiceType:SLServiceTypeFacebook]) {
        SLComposeViewController *facebook = [[SLComposeViewController alloc] init];
        facebook = [SLComposeViewController composeViewControllerForServiceType:SLServiceTypeFacebook];

        [facebook setInitialText:@"initial text"];  
    }

    }

So that worked, and it called the facebook class method correctly, but when I put [self presentViewController:facebook animated:YES] after the setInitialText brackets, it gives me this error: No known class method for selector 'presentViewController:animated:'

By the way it lets me use presentViewController in a instance method but I can't call that method from inside the class method or from my Myscene file. Is there any way to either call an instance method from another file, or access presentViewController from a class method? Thanks

解决方案

You can either pass a reference for your View Controller to your SKScene or you can use NSNotificationCenter instead. I prefer to use the latter.

First make sure you have added the Social.framework to your project.

Import the social framework into your View Controller #import <Social/Social.h>

Then in your View Controller's viewDidLoad method add this code:

[[NSNotificationCenter defaultCenter] addObserver:self
                                     selector:@selector(createPost:)
                                         name:@"CreatePost"
                                       object:nil];

Next add this method to your View Controller:

-(void)createPost:(NSNotification *)notification
{
    NSDictionary *postData = [notification userInfo];
    NSString *postText = (NSString *)[postData objectForKey:@"postText"];
    NSLog(@"%@",postText);

    // build your tweet, facebook, etc...
    SLComposeViewController *mySLComposerSheet = [SLComposeViewController composeViewControllerForServiceType:SLServiceTypeFacebook];
    [self presentViewController:mySLComposerSheet animated:YES completion:nil];

}

At the appropriate location in your SKScene, (won game, lost game, etc...) add this code:

NSString *postText = @"I just beat the last level.";
NSDictionary *userInfo = [NSDictionary dictionaryWithObject:postText forKey:@"postText"];
[[NSNotificationCenter defaultCenter] postNotificationName:@"CreatePost" object:self userInfo:userInfo];

The above code sends a NSNotification, with text, which your View Controller will pick up and execute the specified method.

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