iPhone: UIImageView Fades in - Howto?

Question

I have an UIImageView that I want to fade in.

Is there a way to enable that on an underlying UIViewController?

I have translated the s

Answer 1

Initially set the alpha of your imageview as 0 as imageView.alpha = 0;

- (void)fadeInImage 
{
[UIView beginAnimations:@"fade in" context:nil];
    [UIView setAnimationDuration:1.0];
    imageView.alpha = 1.0;
    [UIView commitAnimations];

}

Answer 2

Swift version

func fadeIn(){
    UIView.beginAnimations("fade in", context: nil);
    UIView.setAnimationDuration(1.0);
    imageView.alpha = 1.0;
    UIView.commitAnimations();
}

Answer 3

I would use UIView's +transitionWithView:duration:options:animations:completion: It is very efficient and powerful.

[UIView transitionWithView:imgView duration:1 options:UIViewAnimationOptionTransitionCrossDissolve animations:^{
    imgView.image = [UIImage imageNamed:@"MyImage"];
} completion:nil];

Answer 4

Change the animation duration to what ever length you want.

UIImageView *myImageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"myImage.png"]];
myImageView.center = CGPointMake(100, 100);
myImageView.alpha = 0.0;
[self.view addSubview:myImageView];
[UIView animateWithDuration:5.0 animations:^{
     myImageView.alpha = 1.0;
}];

Answer 5

Use below in your UIViewController

// add the image view
[self.view addSubview:myImageView];
// set up a transition animation
CATransition *animate = [CATransition animation];
[animate setDuration:self.animationDelay];
[animate setType:kCATransitionPush];
[animate setSubtype:kCATransitionFade];
[animate setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]];

[[self layer] addAnimation:animate forKey:@"fade in"];

Answer 6

this simple code:

[UIView animateWithDuration:5.0 animations:^{
        theImage.alpha = 1.0;
    }];

the UIImage is in the view and is connected via an IBOutlet you can also, set the alpha from the utility panel.