cocos2d box2d比例精灵 - > removechild（怎么样？）

Question

我英语有点慢，请理解。 这里是我的源代码：

- (void)createBall:(CGPoint)touchedAt{ 
    CGSize winSize = [CCDirector sharedDirector].winSize; 
    ball2 = [CCSprite spriteWithFile:@"Ball.png" rect:CGRectMake(0, 0, 54, 54)]; 
    ball2.position = ccp(touchedAt.x,touchedAt.y); 

    [self addChild:ball2]; 


    b2BodyDef ballBodyDef2; 
    ballBodyDef2.type = b2_dynamicBody; 
    ballBodyDef2.position.Set(touchedAt.x/PTM_RATIO, touchedAt.y/PTM_RATIO); 
    ballBodyDef2.userData = ball2; 
    b2Body *body2 = _world->CreateBody(&ballBodyDef2); 
    b2CircleShape circle; 
    circle.m_radius = 89.0/PTM_RATIO;//(arc4random()*26.0)/PTM_RATIO; 
    b2FixtureDef ballShapeDef2; 
    ballShapeDef2.shape = &circle; 
    ballShapeDef2.density = 1.0f; 
    ballShapeDef2.friction = 0.2f; 
    ballShapeDef2.restitution = 0.8f; 
    body2->CreateFixture(&ballShapeDef2); 
} 

-(void)createBall2 
{ 

CGSize winSize = [CCDirector sharedDirector].winSize; 
globalSprite    = [CCSprite spriteWithFile:@"Ball.png"]; 
globalSprite.position  = ccp(winSize.width/2 + globalSprite.contentSize.width, winSize.height/2); 
[self addChild:globalSprite]; 

b2BodyDef ballBodyDef3; 
ballBodyDef3.type = b2_dynamicBody; 
ballBodyDef3.position.Set(100/PTM_RATIO, 100/PTM_RATIO); 
ballBodyDef3.userData = globalSprite ; 
b2Body *body3 = _world->CreateBody(&ballBodyDef3); 
b2CircleShape circle; 
circle.m_radius = 26.0/PTM_RATIO;//(arc4random()*26.0)/PTM_RATIO; 
b2FixtureDef ballShapeDef3; 
ballShapeDef3.shape = &circle; 
ballShapeDef3.density = 1.0f; 
ballShapeDef3.friction = 0.2f; 
ballShapeDef3.restitution = 0.8f; 
body3->CreateFixture(&ballShapeDef3); 
} 

// initialize your instance here 
-(id) init 
{ 
if((self=[super init])) { 

    // enable touch 

    // enable accelerometer 
    CGSize winSize = [CCDirector sharedDirector].winSize; 

    self.isAccelerometerEnabled = YES; 
    self.isTouchEnabled = YES; 

    // Create sprite and add it to the layer 
// Create a world 
    b2Vec2 gravity = b2Vec2(0.0f, 0.0f); 
    bool doSleep = true; 
    _world = new b2World(gravity, doSleep); 

    // Create edges around the entire screen 
    b2BodyDef groundBodyDef; 
    groundBodyDef.position.Set(0,0); 
    b2Body *groundBody = _world->CreateBody(&groundBodyDef); 
    b2PolygonShape groundBox; 
    b2FixtureDef boxShapeDef; 
    boxShapeDef.shape = &groundBox; 
    groundBox.SetAsEdge(b2Vec2(0,0), b2Vec2(winSize.width/PTM_RATIO, 0)); 
    groundBody->CreateFixture(&boxShapeDef); 
    groundBox.SetAsEdge(b2Vec2(0,0), b2Vec2(0, winSize.height/PTM_RATIO)); 
    groundBody->CreateFixture(&boxShapeDef); 
    groundBox.SetAsEdge(b2Vec2(0, winSize.height/PTM_RATIO), b2Vec2(winSize.width/PTM_RATIO, winSize.height/PTM_RATIO)); 
    groundBody->CreateFixture(&boxShapeDef); 
    groundBox.SetAsEdge(b2Vec2(winSize.width/PTM_RATIO, winSize.height/PTM_RATIO), b2Vec2(winSize.width/PTM_RATIO, 0)); 
    groundBody->CreateFixture(&boxShapeDef); 

    // Create ball body and shape 



    [self schedule:@selector(tick:)]; 

    //[self schedule:@selector(gameLogic:) interval:1.0]; 

    [self createBall2]; 

} 
return self; 
} 





- (void)ccTouchesEnded:(NSSet *)touches withEvent:(UIEvent *)event { 

// Choose one of the touches to work with 
UITouch *touch = [touches anyObject]; 
CGPoint location = [touch locationInView:[touch view]]; 
location = [[CCDirector sharedDirector] convertToGL:location]; 

[self createBall:location]; 

} 




- (void)tick:(ccTime) dt {  
_world->Step(dt, 10, 10); 
for(b2Body *b = _world->GetBodyList(); b; b=b->GetNext()) { 

    if (b->GetUserData() != NULL) { 
     CCSprite *ballData = (CCSprite *)b->GetUserData(); 
     ballData.position = ccp(b->GetPosition().x * PTM_RATIO, 
           b->GetPosition().y * PTM_RATIO); 
     ballData.rotation = -1 * CC_RADIANS_TO_DEGREES(b->GetAngle()); 
    }   
    }  
} 

我想

touch -> sprite create(circle) -> sprite scale -> sprite remove 

但

- (void)tick:(ccTime) dt  <---------- this is simulator turn off! 

我想办法

Answer 1

试试这个：

world->DestroyBody(sprite);