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我刚刚从一个教程开始学习 Cocos2d。我想随机飞行“蝙蝠”，当我触摸屏幕上的任何位置时，所有蝙蝠都聚集在我的触摸位置，它们再次开始随机飞行。
这是我的代码： 

-(id) init
{
if( (self=[super init])) {

    [[CCSpriteFrameCache sharedSpriteFrameCache] addSpriteFramesWithFile:@"Bat.plist"];

    //Bats Array Initialization
    bats = [[NSMutableArray alloc] init];

    //Add bats using a batch node.
    CCSpriteBatchNode *batch1 = [CCSpriteBatchNode batchNodeWithFile:@"Bat.png" capacity:10];
    [self addChild:batch1 z:2 tag:TAG_BATS];

    //Make them start flying up.
    for(int x=0; x<5; x++){
        //Create SimpleAnimObject of bat
        bat1 = [SimpleAnimObj spriteWithBatchNode:batch1 rect:CGRectMake(0,0,48,48)];
        [batch1 addChild:bat1];
        [bat1 setPosition:ccp(arc4random()%900+40, arc4random()%600+50)];
        [bat1 setScale:0.6f];

        float flappingSpeed = [self makeBatFlyUp:bat1];
        bat1.velocity = ccp((arc4random()%1000)/500 + 0.2f, 0.1f/flappingSpeed);

        [bats addObject:[NSValue valueWithPointer:bat1]];
        [bat1 retain];

        //Set the bat's direction based on x velocity.
        if(bat1.velocity.x > 0){
            bat1.flipX = YES;
        }
    }

    self.isTouchEnabled = YES;
    [self schedule:@selector(step:)];


}
return self;
}
-(float)makeBatFlyUp:(SimpleAnimObj*)bat {
CCSpriteFrameCache * cache = [CCSpriteFrameCache sharedSpriteFrameCache];

float delay = (float)(arc4random()%5+5)/150;
CCAnimation *animation = [[CCAnimation alloc] initWithName:@"simply_bat_fly" delay:delay];

int num = arc4random()%9+1;
for(int i=1; i<=9; i+=1){
    [animation addFrame:[cache spriteFrameByName:[NSString stringWithFormat:@"b%i.tiff",num]]];
    num++;
    if(num > 9){ num = 1; }
}       

[bat stopAllActions];
[bat runAction:[CCRepeatForever actionWithAction: [CCAnimate actionWithAnimation:animation]]];

bat.animationType = BAT_FLYING_UP;

return delay;
}

在触摸事件中： 

-(BOOL)ccTouchBegan:(UITouch *)touch withEvent:(UIEvent *)event{

CGPoint touchLocation = [touch locationInView:[touch view]];
touchLocation = [[CCDirector sharedDirector] convertToGL:touchLocation];
touchLocation = [self convertToNodeSpace:touchLocation];

float velocityBat =  1024/3.0 ;

CGPoint moveDifference = ccpSub(touchLocation,bat1.position );
float distanceMove = ccpLength(moveDifference);
float moveduration = distanceMove /   velocityBat;

// here i have to use Array but i don't know how to use array to access all same sprites.

self.moveAction = [CCSequence actions:                          
                   [CCMoveTo actionWithDuration:moveduration position:touchLocation],
                   [CCCallFunc actionWithTarget:self selector:@selector(bearMoveEnded)],
                   nil
                   ];
[bat1 runAction:moveAction];

return YES;
}

蝙蝠正常飞行，但是当我在屏幕上触摸时，只有一只蝙蝠跟随我的触摸事件，其他蝙蝠继续随机移动。
有人能帮我一下吗？如果我错过任何事情或我错在哪里？

谢谢！！

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1 回答 1

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您对正在使用的蝙蝠只有一个引用：bat1变量。您需要使用 bats 数组来访问所有的 bat。

另外，去掉这[bat1 retain]条线，因为通过将每个 bat 添加到 bats 数组中，它已经被保留了。Cocos 节点在调用addChild:node.

于 2012-05-30T10:52:31.050 回答