我已经安装了 cocos2d v2.0,我正在做一些工作,看看 v1 发生了什么变化,我创建了一个简单的 cocos2d + box2d 项目,我运行它并且一切正常,我已经删除了 IntroLayer 和Helloworld 层,我试图显示一个简单的背景层,所以我这样做了:
#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
然后在应用程序委托中我改变了这个:
[director_ pushScene: [IntroLayer scene]];
在这:
[director_ pushScene: [GameScene node]];
但是似乎按比例缩放了 0.5,我为视网膜而不是视网膜创建了高清和非高清图像,我错了什么?这是结果:
http://img706.imageshack.us/img706/4778/schermata072456124alle1.png
编辑: 如果我以这种方式更改 BackgroundLayer.m,一切正常:
@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
谁能解释我为什么?我记得在旧版本的 cocos2d 中我可以在 init 方法中添加图层...