Performance of UIImageView and CoreAnimation

Question

I'm working on very simple game. Everything is working. I've only question about performance and memory. I'm moving bird from left to right. The bird waves his wings in 3 positions.

What's better solution regarding speed, performance, memory:

animate uiview changing 3 complete pictures with bird and wing in differnet positions
create bird background and animate single wing image using CALayer animation

Thanks for replies:) Alex

UPDATE: and what about more complex animations ??

sunhsiv sunhsiv · Accepted Answer · 2012-12-31T05:11:26

Since you have only 3 images (as described in your question), you can go with simpler UIView animation approach.

But, using CoreAnimation will give you better performance.

When using 3 different images, instead of changing pictures and animating views, you can use animation property of UIImageView itself.

Say image01.png, image02.png and image03.png are your images.

    UIImageView *animationImgView = [[UIImageView alloc] init];
    NSArray *animationImages = [NSArray arrayWithObjects:
                                        [UIImage imageNamed:@"image01.png"],
                                        [UIImage imageNamed:@"image02.png"],
                                        [UIImage imageNamed:@"image03.png"],
                                        nil];
    [animationImgView setAnimationImages:animationImages];   // Add images to imageView for animation.
    [animationImgView setAnimationRepeatCount:0];           // Repeat forever.
    [animationImgView startAnimating];                     // ImageView starts animating.

Then animate position of UIImageView

Performance of UIImageView and CoreAnimation

1 Answers