Set animation for a dynamically created UIView - iphone

Question

I figured out most of the thing how to add UIView dynamically, but now I'm stuck trying to create a alpha animation when a uibutton is clicked and the uiview is shown up. Not sure what I am missing here:
- (void)buttonPressedAction:(id)sender
{
CGRect frame;
frame.origin.x = 0;
frame.origin.y = 0;
frame.size = self.scrIcon.frame.size;
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:1.0];
UIView* view = [[UIView alloc] initWithFrame:frame];
view.alpha = 1.0;
[UIView commitAnimations];
view.backgroundColor = [UIColor redColor];
[scrIcon addSubview:view];
/*
UIStoryboard* sb = [UIStoryboard storyboardWithName:#"MainStoryboard_iPhone" bundle:[NSBundle mainBundle]];
CategoryViewController* theView = [sb instantiateViewControllerWithIdentifier:#"categoryIdentifier"];
theView.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
[self presentModalViewController:theView animated:YES];*/
}
scrIcon is a UIScrollView
thanks

Answer 1

You can try this method: animateWithDuration:animations:
UIView *view = [[UIView alloc] initWithFrame:self.scrIcon.frame];
view.backgroundColor = [UIColor redColor];
view.alpha = 0.0;
[scrIcon addSubview:view];
[UIView animateWithDuration:1.0 animations:^{
view.alpha = 1.0;
}];

Answer 2

Modified your code add the view 1st to scrIcon. Then perform the animation.
- (void)buttonPressedAction:(id)sender
{
CGRect frame;
frame.origin.x = 0;
frame.origin.y = 0;
frame.size = self.scrIcon.frame.size;
UIView* view = [[UIView alloc] initWithFrame:frame];
view.alpha = 0.0f;
view.backgroundColor = [UIColor redColor];
[scrIcon addSubview:view];
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:1.0];
view.alpha = 1.0;
[UIView commitAnimations];
}

Answer 3

In ViewDidLoad: just init Your View…..
YourAnimateView = [[UIView alloc]initWithFrame:CGRectMake(-320, 0, 320, 320)];
[self.view addSubview:YourAnimateView];
In Your Button Action Method : just put this
[UIView animateWithDuration:0.5 delay:0.1
options:UIViewAnimationOptionTransitionCurlDown
animations:^{
//animation code
YourAnimateView.frame = CGRectMake(0, 0, 320, 345);
} completion:^(BOOL finished) {
//completion code
}];