cocos2d加载场景失败

#import "LoadingScene.h"
#import "ScoreScene.h"
#import "HelloWorldScene.h"


@implementation LoadingScene

+(id) sceneWithTargetScene: (TargetScenes) targetScene {
    return [[[self alloc] initWithTargetScene: targetScene] autorelease];
 }
 -(id) initWithTargetScene: (TargetScenes) targetScene {
    if ((self = [super init])) {
        targetScene_ = targetScene;

        CCLabelTTF *label = [CCLabelTTF labelWithString:@"Loading..." fontName:@"Marker Felt" fontSize:64];
        [self addChild:label];

        CCLOG(@"this is inside initwithtargetscene");
        [self scheduleUpdate];
    }
    return self;
 }


-(void) update: (ccTime) delta {
    CCLOG(@"this is inside update");
    [self unscheduleAllSelectors];
    switch (targetScene_) {
        case TargetSceneScoreScene:
            [[CCDirector sharedDirector] replaceScene:[ScoreScene scene]];
            break;
        case TargetSceneHelloWorld:
            [[CCDirector sharedDirector] replaceScene:[HelloWorld scene]];
            break;


        default:
            break;
    }
 }

 @end

#import "ScoreScene.h"
#import "LoadingScene.h"


@implementation ScoreScene


+(id) scene
 {
    // 'scene' is an autorelease object.
    CCScene *scene = [CCScene node];

    // 'layer' is an autorelease object.
    ScoreScene *layer = [ScoreScene node];

    // add layer as a child to scene
    [scene addChild: layer];

    // return the scene
    return scene;
 }


// on "init" you need to initialize your instance
 -(id) init
 {
    // always call "super" init
    // Apple recommends to re-assign "self" with the "super" return value
    if( (self=[super init] )) {
        for (int i = 0; i < 4000000; i++) {
            int b = 343 / 247;
        }

        self.isTouchEnabled = YES;
        // create and initialize a Label
        CCLabelTTF *label = [CCLabelTTF labelWithString:@"this is a score" fontName:@"Marker Felt" fontSize:64];

        // ask director the the window size
        CGSize size = [[CCDirector sharedDirector] winSize];

        // position the label on the center of the screen
        label.position = ccp( size.width /2 , size.height/2 );

        // add the label as a child to this Layer
        [self addChild: label];
    }
    return self;
 }


-(void) ccTouchesBegan: (NSSet *) touches withEvent: (UIEvent *) event {
    [LoadingScene sceneWithTargetScene: TargetSceneHelloWorld];


}


// on "dealloc" you need to release all your retained objects
 - (void) dealloc
 {
    // in case you have something to dealloc, do it in this method
    // in this particular example nothing needs to be released.
    // cocos2d will automatically release all the children (Label)

    // don't forget to call "super dealloc"
    [super dealloc];
 }


@end

    #import "HelloWorldScene.h"
 #import "LoadingScene.h"
 // HelloWorld implementation
 @implementation HelloWorld


+(id) scene
 {
    // 'scene' is an autorelease object.
    CCScene *scene = [CCScene node];

    // 'layer' is an autorelease object.
    HelloWorld *layer = [HelloWorld node];

    // add layer as a child to scene
    [scene addChild: layer];

    // return the scene
    return scene;
 }


// on "init" you need to initialize your instance
 -(id) init
 {
    // always call "super" init
    // Apple recommends to re-assign "self" with the "super" return value
    if( (self=[super init] )) {
        self.isTouchEnabled = YES;
        // create and initialize a Label
        CCLabelTTF *label = [CCLabelTTF labelWithString:@"Hello World" fontName:@"Marker Felt" fontSize:64];


        // ask director the the window size
        CGSize size = [[CCDirector sharedDirector] winSize];

        // position the label on the center of the screen
        label.position = ccp( size.width /2 , size.height/2 );

        // add the label as a child to this Layer
        [self addChild: label];
    }
    return self;
 }




- (void) ccTouchesBegan:(NSSet*) touches withEvent: (UIEvent *) event {
    CCLOG(@"this is inside touches began");
    [LoadingScene sceneWithTargetScene:TargetSceneScoreScene];
 }

 // on "dealloc" you need to release all your retained objects
 - (void) dealloc
 {
    // in case you have something to dealloc, do it in this method
    // in this particular example nothing needs to be released.
    // cocos2d will automatically release all the children (Label)

    // don't forget to call "super dealloc"
    [super dealloc];
 }

 @end