How to disable UIView Layer resize bounds animation in iOS?

Question

when I try to process an animation of UIView to make GLKView fit the screen,

the layer of GLKView was fine, but the OpenGL image of GLKView was being smaller then fit to size.

How can I make it no more smaller, just transform from origin size to new size ?

original size of opengl image

process an uiview animation to make opengl image fit the screen (I don't want the image being smaller when animation processing)

new size of opengl image

Answer 1

Try to use UIImageView

    UIImageView *imageView = [[UIImageView alloc] initWithImage:@"your image"];
    imageView.contentMode = UIViewContentModeScaleAspectFit;