flip a uibutton

Flip a Button

BOOL isFrontViewShowing;


- (void) viewDidLoad{
    [super viewDidLoad];

    isFrontViewShowing = YES;

    UIButton *flipBtn = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    flipBtn.frame = CGRectMake(100, 100, 100, 40);
    flipBtn.backgroundColor = [UIColor redColor];
    [flipBtn setTitle:@"Front" forState:UIControlStateNormal];
    [flipBtn addTarget:self action:@selector(flipBtnTapped:) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:flipBtn];
}

- (void) flipBtnTapped:(UIButton *)flipBtn{
    
    isFrontViewShowing = !isFrontViewShowing;
    
    [UIView animateWithDuration:0.3 animations:^{
        if(isFrontViewShowing){
            [UIView setAnimationTransition:UIViewAnimationTransitionFlipFromRight forView:flipBtn cache:YES];
            [flipBtn setTitle:@"Back" forState:UIControlStateNormal];  
        } else{
            [UIView setAnimationTransition:UIViewAnimationTransitionFlipFromRight forView:flipBtn cache:YES];
            [flipBtn setTitle:@"Front" forState:UIControlStateNormal];
        }
    }];
}