在我的应用程序中，当触摸屏幕时，physicssprite 将被添加到游戏层中。所有的physicsSprites都将被添加到一个NSMutableArray中。当数组计数达到 5 时，我想同时缩小所有添加的物理精灵。
我已经尝试过，但不起作用。
请帮助我。
//创建精灵
-(void) addNewSpriteAtPosition:(CGPoint)pos
{
PhysicsSprite *sprite = [PhysicsSprite spriteWithFile:@"sprite.png"];
sprite.position = pos;
sprite.tag = 1;
[sprites addObject:sprite];
[self addChild: sprite];
int num = 4;
cpVect verts[] = {
cpv(-20,-20),
cpv(-20, 20),
cpv( 20, 20),
cpv( 20,-20),
};
cpBody *body = cpBodyNew(1.0f, cpMomentForPoly(1.0f, num, verts, CGPointZero));
cpBodySetPos( body, pos );
cpSpaceAddBody(space_, body);
cpShape* shape = cpPolyShapeNew(body, num, verts, CGPointZero);
cpShapeSetElasticity( shape, 0.5f );
cpShapeSetFriction( shape, 0.5f );
cpSpaceAddShape(space_, shape);
[sprite setPhysicsBody:body];
NSLog(@"array size :%i",[sprites count]);
}
- (void)ccTouchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
for( UITouch *touch in touches ) {
CGPoint location = [touch locationInView: [touch view]];
location = [[CCDirector sharedDirector] convertToGL: location];
//add sprite
[self addNewSpriteAtPosition: location];
}
//scale sprites
if([sprites count]>5){
//[self terminateGame];
for(int i=0;i<[sprites count];i++){
PhysicsSprite *PS = [PhysicsSprite spriteWithFile:
[sprites objectAtIndex:i]];
id mAction1 = [CCScaleTo actionWithDuration:0.5 scaleX:0.5 scaleY:0.5];
[PS runAction:mAction1];
}
}
}
我已经尝试实现 phisycsSprite.scale = 0.5; 在更新方法中但不起作用。