NSMutableArray에 객체를 추가 할 수 없습니다.

Question

안녕하세요! 필자는 물리 엔진 "chipmunk"를 사용합니다. 클릭하여 동적 객체를 생성하십시오. AddBalls()는 원하는 본문과 모양을 만듭니다. 그것을 클릭하면 새로운 객체를 생성하여 배열에 넣어야합니다.

-(void)AddBalls: (UIImageView *)image; 
{ 
    cpBody *ball2Body = cpBodyNew(100.0, INFINITY); 
    ball2Body->p = cpv(60, 250); 
    cpSpaceAddBody(space, ball2Body); 

    cpShape *ball2Shape = cpCircleShapeNew(ball2Body, 20.0, cpvzero); 
    ball2Shape->e = 0.5; 
    ball2Shape->u=0.2; 
    ball2Shape->data = (__bridge void*)image; 
    ball2Shape->collision_type = 1; 
    cpSpaceAddShape(space, ball2Shape); 

    [children addObject: (__bridge id)ball2Shape];//EXC_BAD_ACCESS code=1 
} 

-(void)setupChipmunk 

{ 
    cpInitChipmunk(); 
    space = cpSpaceNew(); 
    space->gravity = cpv(0, -100); 
    space->elasticIterations = 10; 

    [NSTimer scheduledTimerWithTimeInterval:1.0f/60.0f target:self selector:@selector(tick:) userInfo:nil repeats:YES]; 

    cpBody *ballBody = cpBodyNew(100.0, INFINITY); 
    ballBody->p = cpv(60,250); 
    cpSpaceAddBody(space, ballBody); 
    cpShape *ballShape = cpCircleShapeNew(ballBody, 20.0, cpvzero); 
    ballShape->e = 0.5; 
    ballShape->u = 0.8; 
    (ballShape->data) =(__bridge void*) ball; 
    ballShape->collision_type = 1; 
    cpSpaceAddShape(space, ballShape); 
} 

-(void)tick:(NSTimer *)timer 
{ 
    cpSpaceStep(space, 1.0f/60.0f); 
    cpSpaceHashEach(space->activeShapes, &updateShape, nil); 
} 

-(void) updateShape (void *ptr, void *unused) 
{ 
    cpShape *shape = (cpShape*)ptr; 

    if(shape == nil || shape->body == nil || shape->data == nil) { 
     NSLog(@"Unexpected shape please debug here..."); 
     return; 
    } 

    if([(__bridge UIImageView*)shape->data isKindOfClass:[UIView class]]) { 
     [(UIView *)((__bridge UIImageView*)shape->data) setCenter:CGPointMake(shape->body->p.x, 480 - shape->body->p.y)]; 
    } 
} 



- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation 
{ 
    if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) { 
     return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown); 
    } else { 
     return YES; 
    } 
} 

- (void)handleTap:(UITapGestureRecognizer *)sender {  
    if (sender.state == UIGestureRecognizerStateEnded) { 
     [self AddBalls]; 
    } 
} 

메서드 AddBalls는 배열에 새로운 도형을 넣어야합니다. 하지만 "EXC_BAD_ACCESS..."오류가 있습니다. 어떻게해야합니까? 감사합니다

Answer 1

어떤 유형이든 id으로 전송할 수는 없지만 실제로는 Objective-C 유형이어야합니다. ball2Shape을 NSValue에 넣어야합니다.

[children addObject:[NSValue value:&ball2Shape withObjCType:@encode(cpBody*)]]; 

... 
//When you need to use/free the values 
for (NSValue *value in children) 
{ 
    cpBody *body = (cpBody*)[value pointerValue]; 

    //Use body like you did above. 

    //Even though it is ARC you will need to free cpBody since 
    // it is not an Objective-C object 
    cpBodyFree(body); 
}