UIButton not responding after animation

Question

I would prefer first download the project from below link and then continue with question (only 36kb)

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At start what I have is

Answer 1

Yipeee!!! Below is how I did.

.h

Added new variable.

@property (retain, nonatomic) NSString *hideStatus;

.m

-(void) viewDidAppear:(BOOL)animated {
    NSLog(@"viewDidAppear");
    CGAffineTransform translation = CGAffineTransformIdentity;
    translation = CGAffineTransformMakeTranslation(0, -100);
    self.view.transform = translation;
    self.view.clipsToBounds = YES;
    [UIView commitAnimations];
    self.view.frame = CGRectMake(0,-80,320,560);
    hideStatus = @"hidden";
}

- (IBAction)showHiddenButton:(id)sender {
    NSLog(@"hideStatus===%@", hideStatus);
    CGAffineTransform translation = CGAffineTransformIdentity;
    if ([hideStatus isEqualToString:@"hidden"]) {
        translation = CGAffineTransformMakeTranslation(0, 0);
        hideStatus = @"shown";
    } else {
        translation = CGAffineTransformMakeTranslation(0, -100);
        hideStatus = @"hidden";
    }

    [UIView beginAnimations:nil context:nil];
    self.view.transform = translation;
    self.view.clipsToBounds = YES;
    [UIView commitAnimations];
}

Attached is the sample project. You can download from here.