버튼 뒤집기 ?? (카드 게임 에서 view 뒤집기 효과)

닥치고 기억을 만들면서 버튼을 터치 하면 뒤집게 하는 효과 작성에 
이용된 코드이다.

- (void) toFrontBtnImage: (UIButton *)btn

{

    UIImage * img;

    NSString * fileName;

    fileName = (NSString *)[mCountryNameArray objectAtIndex:flagsArray[btn.tag]];

    

    img = [UIImage imageNamed:fileName];        

    flagSide[btn.tag] = FRONT;

    

    CGPoint startpoint = CGPointMake(0, 0);

    [img drawAtPoint:startpoint];

    [UIView beginAnimations:@"toFrontBtnImage" context:nil];

    [UIView setAnimationDuration:ANIMATION_DURATION];

    

    [UIView setAnimationTransition:UIViewAnimationTransitionFlipFromLeft forView:btn cache:YES];

    

    [btn setImage:img forState:UIControlStateNormal];

    [UIView setAnimationDelegate:self];

    [UIView setAnimationDidStopSelector:@selector(animationDidStop:finished:context:)];

    [UIView commitAnimations];

    btn.enabled = YES;

}

- (void) toBackBtnImage: (UIButton *)btn

{

    UIImage * img;

    img = [UIImage imageNamed:@"back.png"];

    flagSide[btn.tag] = BACK;

    

    CGPoint startpoint = CGPointMake(0, 0);

    [img drawAtPoint:startpoint];

    

    [UIView beginAnimations:@"toBackBtnImage" context:nil];

    [UIView setAnimationDuration:ANIMATION_DURATION];

    [UIView setAnimationCurve:UIViewAnimationCurveEaseOut]; // 빠져나갈때 가속

    

    [UIView setAnimationTransition:UIViewAnimationTransitionFlipFromRight forView:btn cache:YES];

    

    [btn setImage:img forState:UIControlStateNormal];

    [UIView setAnimationDelegate:self];

    [UIView setAnimationDidStopSelector:@selector(animationDidStop:finished:context:)];

    [UIView commitAnimations];

    btn.enabled = YES;

}

위 함수는 하나는 국기 모양으로 뒤집고 

하나는 백 배경으로 뒤집는다.

animationDidStop 함수를 만들어서

에니메이션이 종료하면 처리 할수 있도록 처리 한다.

- (void) animationDidStop:(NSString *)animationID finished:(NSNumber *)finished context:(void *)context 

{

    if ([animationID isEqualToString:@"toFrontBtnImage"]){

        //처리 하고 싶은 일...

    }