Expanding and Shrinking UIView in iPhone - animation

Question

I am working on an iPhone games like application, where I have to ask one question and corresponding answers on UIButoons. When user presses any button I show right and wrong image based on chosen answer. I create answer view by following code and attach it to main view:
-(void)ShowOutputImageAsAnswerView:(BOOL)correct
{
viewTimer = [NSTimer scheduledTimerWithTimeInterval:0.3 target:self selector:#selector(RemoveSubViewFromMainView) userInfo:nil repeats:YES];
UIView *viewOutput = [[UIView alloc]initWithFrame:CGRectMake(200, 100, 80, 80)];
viewOutput.tag = 400;
viewOutput.backgroundColor = [UIColor clearColor];
UIImageView *imgAns = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 70, 70)];
if (correct)
{
imgAns.image = [UIImage imageNamed:#"correct_icon.png"];
}
else
{
imgAns.image = [UIImage imageNamed:#"wrong_icon.png"];
}
[viewOutput addSubview:imgAns];
[self.view addSubview:viewOutput];
[self.view bringSubviewToFront:viewOutput];
[imgAns release];
[viewOutput release];
}
I have to show this answer view in the animated form. And this animation will start from its 0 pixel to 80 pixel. Means expanding and shrinking view.
How can it be implemented?
Can it directly be used with imgAns?

Answer 1

You create an animation by doing something like this:
myView.frame=CGRectMake(myView.frame.origin.x,myView.frame.origin.y,0.,0.);
[UIView animateWithDuration:1
animations:^{
//put your animation here
myView.frame=CGRectMake(myView.frame.origin.x,myView.frame.origin.y,80.,80-);
}];
I haven't tried this code, but it should give you a good perspective of how to do it.