alpha value of uitabbaritem - iphone

Question

I am trying to figure out how to set my tabbaritem icon(image) to 0 so I can give it a fade animation once it loads onto the screen... but I just don't know how to do it..
this is how I am adding the images to the tabbar..
- (void)viewDidAppear:(BOOL)animated
{
self.button0.image = [UIImage imageNamed:#"icon1.png"];
self.button1.image = [UIImage imageNamed:#"icon2.png"];
self.button2.image = [UIImage imageNamed:#"icon3.png"];
self.button3.image = [UIImage imageNamed:#"icon4.png"];
self.button4.image = [UIImage imageNamed:#"icon5.png"];
self.button5.image = [UIImage imageNamed:#"icon1.png"];
}
I will animate them with a method that looks something like this
[UIView animateWithDuration:0.3f
delay:0.0f
options:UIViewAnimationOptionCurveEaseOut
animations:^{
// Do your animations here
}
completion:^(BOOL finished){
if (finished) {
// Do your method here after your animation.
}
}];
any help would be greatly appreciated.
Update this is my latest attempt thats not working yet..
buttonImage0.image = [UIImage imageNamed:#"icon1.png"];
buttonImage0.alpha = 0.0;
self.button0.image = buttonImage0.image;
[UIView animateWithDuration:0.1f
delay:0.0f
options:UIViewAnimationOptionTransitionNone
animations:^{
// Do your animations here.
buttonImage0.alpha = 1.0;
}
completion:^(BOOL finished){
if (finished) {
// Do your method here after your animation.
}
}];

Answer 1

UIButton is a subclass of UIView. UIView has an alpha property.
Try:
self.button0.alpha = 0.0;
self.button1.alpha = 0.0;
self.button2.alpha = 0.0;
self.button3.alpha = 0.0;
self.button4.alpha = 0.0;
self.button5.alpha = 0.0;
in your viewDidAppear;
Then put your easing function in the animateWithDuration routine using the same alpha property!