애니메이션 주기

UIImageView 의 IBOutlet 하나 필요, (helicopterImageVew)
충돌을 확인할 UIImageView 의 IBOutlet 도 하나 필요(birdImageView)

경로를 따라 이동하는 Path 버튼과 프로펠러 회전을 시키는 Swing 버튼을 위한 두 개의 IBAction 필요

//초기화 부분..

{

  ...

    UIImage *heliImage1 = [UIImage imageNamed:@"heli_1.png"];

    UIImage *heliImage2 = [UIImage imageNamed:@"heli_2.png"];

    UIImage *heliImage3 = [UIImage imageNamed:@"heli_3.png"];

    UIImage *heliImage4 = [UIImage imageNamed:@"heli_4.png"];

    UIImage *heliImage5 = [UIImage imageNamed:@"heli_5.png"];

    UIImage *heliImage6 = [UIImage imageNamed:@"heli_6.png"];

    NSArray *animationImageArray = [NSArray arrayWithObjects:heliImage1, heliImage2,

heliImage3, heliImage4, heliImage5, heliImage6, nil];

    helicopterImageView.animationImages = animationImageArray;

    helicopterImageView.animationDuration = 0.1;

   ...

}

...

- (IBAction)toggleFlay:(id)sender

{

    if ([helicopterImageView isAnimating]){

        [helicopterImageView stopAnimating];

    } else {

        [helicopterImageView startAnimating];

    }

}

- (IBAction)moveThroughPath:(id)sender

{

    birdImageView.hidden = NO;

    

    //패쓰 만들기

    CGMutablePathRef aniPath = CGPathCreateMutable();

    CGPoint currCenter = helicopterImageView.center;

    CGAffineTransform xform = CGAffineTransformIdentity;

    CGPathMoveToPoint(aniPath, &xform, currCenter.x, currCenter.y);

    CGPathAddCurveToPoint(aniPath, &xform, -200, currCenter.y, 520, 400, 160, 400);

    

    //애니메이션 만들기

    CAKeyframeAnimation *keyAni = [CAKeyframeAnimation animation];

    keyAni.duration = 4.0;

    keyAni.path = aniPath;

    keyAni.rotationMode = kCAAnimationRotateAutoReverse;

    

    

    //레이어에 애니메이션을 더한다

    [NSTimer scheduledTimerWithTimeInterval:0.1

   target:self

 selector:@selector(collisionCheck:) userInfo:nil repeats:YES];

    [helicopterImageView.layer addAnimation:keyAni forKey:@"position"];

    

}

- (void)collisionCheck:(NSTimer *)timer

{

    CALayer *presentationLayer = helicopterImageView.layer.presentationLayer;

    CGRect presentationRect = presentationLayer.frame;

    CGRect birdRect = birdImageView.frame;

    

    if (CGRectIntersectsRect(presentationRect, birdRect)){

        NSLog(@"Collision");

        birdImageView.hidden = YES;

        [timer invalidate];

        timer = nil;

    }

}