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我正在继承 CCSprite。（最初是子类 CCNode 但有同样的问题）

来自 EnemyShip.h：

@interface EnemyShip : CCSprite
- (id)initWithFile:(NSString *)file health:(int)health;

@property (nonatomic, assign) NSInteger health; 

@end

@interface easyShip : EnemyShip
- (id)init;
@end

来自 EnemyShip.mm：

@implementation EnemyShip

@synthesize health;

- (id)initWithFile:(NSString *)file health:(int)h
{
    if ((self = [super initWithFile:file])) {
        self.health= h;
        self.position=[CCDirector sharedDirector].screenCenter;
}
return self;
}

@end

@implementation easyShip

- (id)init{
    if ((self = [super initWithFile:@"enemy_side_hole.png" health:100])){}
    return self;
}

@end

都很基本。我通过以下方式添加这个敌人：

-(void) addEnemy:(CGPoint)p
{
    EnemyShip *enemyShip = [[easyShip alloc]init];
    [self addChild:enemyShip z:0]; 
}

所以我在我的更新方法中进行碰撞检测。（再次——一旦这个工作，我将使用 sprite 属性等对 CCNode 进行子类化）

for(EnemyShip* theEnemies in [self children])
{
    NSLog(@"x,y: (%f,%f)",theEnemies.position.x,theEnemies.position.y);
}

我理解上述内容可以访问我作为孩子添加的所有“EnemyShip”并记录它的位置。确实如此。除了位置到处都是 - 即使我可以看到精灵没有移动到任何地方，并且来自同一 .position.x/y 类的 NSLog 输出正确的坐标。

我的输出是：

2013-04-23 23:24:48.122 Radon[9209:907] x,y: (0.000000,0.000000)
2013-04-23 23:24:48.130 Radon[9209:907] x,y: (768.000000,512.000000)
2013-04-23 23:24:48.131 Radon[9209:907] x,y: (384.000000,512.000000)
2013-04-23 23:24:48.134 Radon[9209:907] x,y: (192.000000,512.000000)
2013-04-23 23:24:48.135 Radon[9209:907] x,y: (600.000000,30.000000)
2013-04-23 23:24:48.135 Radon[9209:907] x,y: (525.000000,30.000000)
2013-04-23 23:24:48.136 Radon[9209:907] x,y: (450.000000,30.000000)
2013-04-23 23:24:48.138 Radon[9209:907] x,y: (375.000000,30.000000)
2013-04-23 23:24:48.139 Radon[9209:907] x,y: (300.000000,30.000000)
2013-04-23 23:24:48.140 Radon[9209:907] x,y: (225.000000,30.000000)
2013-04-23 23:24:48.142 Radon[9209:907] x,y: (162.000000,512.000000)

// - 编辑以反映一个错字和不正确的输出结果

4

1 回答 1

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I've used an alternate approach, as I need this done quickly.

added 

NSMutableArray enemies;

create 'enemies':

EnemyShip *enemyShip = [[EnemyShip alloc]init];
[enemies addObject:enemyShip];
[self addChild:enemyShip z:0];

iterate through this specifically instead of grabbing the other way:

for(NSUInteger i=0;i<[enemies count];i++){
    EnemyShip* enemy = [enemies objectAtIndex:i];
    NSLog(@"x,y: (%f,%f)",enemy.sprite.position.x,enemy.sprite.position.y);
}

Works fine.

Note: ^ using a CCNode subclass which contains a CCSprite instead of a CCSprite subclass, hence some names are different.

于 2013-04-23T23:31:50.463 回答