Question

我的cocos2d游戏有问题。我试图每隔5秒删除一个敌人的射弹（每个射弹应该有5秒的生命值），但我无法弄清楚如何做到这一点。我得到

的错误

Assertion failure in -[CCTimer initWithTarget:selector:interval:]

这是我的代码：

-(void)projectileShooting:(ccTime)dt
{
    [self schedule:@selector(projectileShooting:) interval:2.5];
    projcount++;
    if([proj count] <= 15 ){
        if(enemy1.position.y < 320){
            v = ccp(player.position.x,player.position.y);
            for(CCSprite *enemies in enemy){
            CCSprite * projectilebullet = [CCSprite spriteWithFile:@"Projectile.png"];
            [proj addObject:projectilebullet];
            [self addChild:projectilebullet];
            CGPoint MyVector = ccpSub(enemies.position,player.position );
            MyVector = ccpNormalize(MyVector);
            MyVector = ccpMult(MyVector, enemies.contentSize.width/2);
            MyVector = ccpMult(MyVector,-1);
            projectilebullet.position = ccpAdd(enemies.position, MyVector);
            for(CCSprite *projectile in proj){
                [self schedule:@selector (deleteprojectile:projectile:) interval:5];
            }
        }
    }
}

for(CCSprite *enem2 in enemytwo)
{
    if(  [proj count] <= 15){
        CCSprite * projectilebull = [CCSprite spriteWithFile:@"Projectile.png"];
        CGPoint MyVector = ccpSub(enem2.position,player.position );
        MyVector = ccpNormalize(MyVector);
        MyVector = ccpMult(MyVector, enem2.contentSize.width/2+10);
        MyVector = ccpMult(MyVector,-1);
        projectilebull.position = ccpAdd(enem2.position, MyVector);
        [self addChild:projectilebull];
        [proj addObject:projectilebull];
        for(CCSprite *projectile in proj){
        }
    }
}



}

-(void)deleteprojectile:(CCSprite *)protime:(ccTime)dt{
    NSMutableArray *timepro = [[NSMutableArray alloc]init];
    [timepro addObject:protime];
    for(CCSprite *objecttime in timepro){
        [proj removeObject:objecttime];
        [self removeChild:objecttime cleanup:YES];
    }
}

Answer 1

这有点像黑客，但这是我在我的程序中使用的，直到找到更优雅的解决方案。我在游戏层中有一个方法，我调用它从父节点中删除一个节点，如下所示：

-(void)removeNode:(CCNode*)node {
    [node removeFromParentAndCleanup:YES];
}

当我想在延迟后安排节点删除时，我称之为：

[self performSelector:@selector(removeNode:) withObject:node afterDelay:delay];

简单，而且有效。

Answer 2

将选择器中的参数名称更改为 protime 而不是 projectile 。选择器必须与对象的类定义中定义的签名匹配。您的选择器未正确定义，并且Timer可能正在检查对象是否实现了给定的选择器。

我没有时间测试它，所以感谢@RamyAlZuhouri确认。

每隔5秒Cocos2d一次删除一个对象

2 个答案: