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Flappy Birdのようなゲームを作っています。SKScene から UIViewController を表示するにはどうすればよいですか? まず自分の環境を教えます

  • マック OS X 10.9
  • クロスコード 5.0.2
  • Sprite Kit(framework), social.framework(framework) をプロジェクトに追加

私の目標は、ゲームオーバー時に「共有」ボタンを表示することです。共有ボタンの画像をタップすると、SLComposeViewController (Twitter Share) が表示されます。シーンの内容は変更しないでください。
以下の問題を解決し、表示を GameOverScene から social.framework で構成された tweetSheet(display) に変更したいと考えています。

問題

[self presentViewController:tweetSheet animated:YES completion:nil];
//Error:No visible @interface for 'GameOverScene' declares the selector "presentViewController":animated:completion:


私のコーディングファイルは以下です（重要なコードの一部を抽出しました）。

ViewController.h

import <UIKit/UIKit.h>
import <SpriteKit/SpriteKit.h>
import <iAd/iAd.h>

@interface ViewController : UIViewController<ADBannerViewDelegate><br>

@end

GameOverScene.h

#import <SpriteKit/SpriteKit.h> 

@class SpriteViewController;

@interface GameOverScene : SKScene {
}
@end

GameOverScene.m

#import "GameOverScene.h"
#import "NewGameScene.h"
#import "MainScene.h"
#import <Social/Social.h>
@implementation GameOverScene {
   //The twitter button 
    SKSpriteNode *_twitterbutton;
}
- (id)initWithSize:(CGSize)size
{
    if (self = [super initWithSize:size]) {
        //Creating the twitterbutton with the twitterbutton image from Images.xcassets
        _twitterbutton = [SKSpriteNode spriteNodeWithImageNamed:@"twitterbutton"];
        [_twitterbutton setSize:CGSizeMake(50, 50)];
        [_twitterbutton setPosition:CGPointMake(self.size.width/2, self.size.height/5 + 50)];
        //Adding the twitter button
        [self addChild:_twitterbutton];
        //Again, this is important, otherwise we can't identify what button is pressed
        _twitterbutton.name = @"twitterbutton";
        [_twitterbutton setPosition:CGPointMake(self.size.width/2, self.size.height/5 + 50)]
    }
    return self;
}


- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    //Same as in NewGameScene menu
    UITouch *touch = [touches anyObject];
    CGPoint location = [touch locationInNode:self];
    SKNode *node = [self nodeAtPoint:location];
    //Is the twitter button touched?
    if([node.name isEqualToString:@"twitterbutton"]){
        if ([SLComposeViewController isAvailableForServiceType:SLServiceTypeTwitter]){
            SLComposeViewController *tweetSheet = [SLComposeViewController composeViewControllerForServiceType:SLServiceTypeTwitter];
            [tweetSheet setInitialText:@"TestTweet from the Game !!"];
            [self presentViewController:tweetSheet animated:YES completion:nil];
     **//Error:No visible @interface for 'GameOverScene' declares the selector "presentViewController":animated:completion:**
         } 
    }

ViewController.m

#import "ViewController.h"
#import "NewGameScene.h"
@implementation ViewController
//Loads the view onto our main class
- (void)loadView
{
  self.view  = [[SKView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]];
}
//Executes when view finishes loading
- (void)viewWillLayoutSubviews
{
  [super viewDidLoad];

  //Set the resize mode to flexible width and height
  [self.view setAutoresizingMask:UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight];

  //Create our view from our original view
  //Make sure to leave originalContentView in, otherwise the app will crash
  SKView *skView = (SKView *)self.originalContentView;

  //We create a new NewGameScene according to the current dimensions
  SKScene *scene = [NewGameScene sceneWithSize:skView.bounds.size];

  //Create a transition class with animation type fade and a duration of .4 seconds
  SKTransition *transition = [SKTransition fadeWithDuration:.4];

  //Present the menu view (NewGameScene) with our fade in transition
  [skView presentScene:scene transition:transition];
}

@end
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