cocos2d v2 scale my background - iphone

Question

i have install cocos2d v2.0, and i am working a little on it, to see what changed against v1, i have create a simple cocos2d + box2d project, and i run it and all work fine, i have deleted the IntroLayer and the Helloworld Layer, i have tried to display a simple background layer, so i have do this:
#import <Foundation/Foundation.h>
#import "cocos2d.h"
#interface BackgroundLayer : CCLayer
#end
#import "BackgroundLayer.h"
#implementation BackgroundLayer
-(id)init {
self = [super init];
if (self != nil) {
CCSprite *backgroundImage = [CCSprite spriteWithFile:#"background.png"];
CGSize screenSize = [[CCDirector sharedDirector] winSize];
backgroundImage.position = ccp(screenSize.width/2, screenSize.height/2);
[self addChild:backgroundImage z:0 tag:0];
}
return self;
}
#end
#import <Foundation/Foundation.h>
#import "cocos2d.h"
#import "BackgroundLayer.h"
#interface GameScene : CCScene
#end
#import "GameScene.h"
#implementation GameScene
-(id)init {
self = [super init];
if (self != nil) {
BackgroundLayer *backgroundLayer = [BackgroundLayer node];
[self addChild:backgroundLayer z:0];
}
return self;
}
#end
and then in the app delegate i have changed this:
[director_ pushScene: [IntroLayer scene]];
in this:
[director_ pushScene: [GameScene node]];
but the seem scaled of the 0.5, i have created the hd and the not hd image, for retina and not retina, what i wrong? this is the result:
http://img706.imageshack.us/img706/4778/schermata072456124alle1.png
EDIT:
if i change the BackgroundLayer.m in this way, all work fine:
#implementation BackgroundLayer
/*-(id)init {
self = [super init];
if (self != nil) {
CCSprite *backgroundImage = [CCSprite spriteWithFile:#"background.png"];
CGSize screenSize = [[CCDirector sharedDirector] winSize];
backgroundImage.position = ccp(screenSize.width/2, screenSize.height/2);
[self addChild:backgroundImage z:0 tag:0];
}
return self;
}*/
-(void) onEnter
{
[super onEnter];
CCSprite *backgroundImage = [CCSprite spriteWithFile:#"background.png"];
CGSize screenSize = [[CCDirector sharedDirector] winSize];
backgroundImage.position = ccp(screenSize.width/2, screenSize.height/2);
[self addChild:backgroundImage z:0 tag:0];
}
#end
anyone can explain me why? i remember that in the old version of cocos2d i can add the layer in the init method...

Answer 1

Use this style, worked in cocos2d 2.0 also.
#interface GameScene : CCLayer
{
}
+(CCScene *) scene;
#end
#import "GameScene.h"
#implementation GameScene
+(CCScene *) scene
{
// 'scene' is an autorelease object.
CCScene *scene = [CCScene node];
// 'layer' is an autorelease object.
GameScene *gameScenelayer = [GameScene node];
// add layer as a child to scene
[scene addChild: gameScenelayer];
// return the scene
return scene;
}
-(id)init {
self = [super init];
if (self != nil) {
CCSprite *backgroundImage = [CCSprite spriteWithFile:#"background.png"];
CGSize screenSize = [[CCDirector sharedDirector] winSize];
backgroundImage.position = ccp(screenSize.width/2, screenSize.height/2);
[self addChild:backgroundImage z:0 tag:0];
}
return self;
}
#end
//Call this
[director_ pushScene: [GameScene scene]];