Animated size modification using AHEasing in Xcode

Question

I'm trying to make a view change size using AHEasing by WarrenM https://github.com/warrenm/AHEasing I have the point to point animation working, but the re-sizing doesn't seem to work. I'm pretty new at using AHEasing so I'm not sure what mistake I'm making.

From what I can tell the image "someImage" should be resizing from CGSizeMake(300, 500) to CGSizeMake(100, 100), but the changes are completely ignored.

Any help would be greatly appreciated

Here's a simplified version of what I am trying to do:

-(void)viewDidLoad
{
    UIImageView *someImage.frame = CGRectMake(0, 0, 300, 500);
    [self.view addsubview:someImage];
    [self animatedResize];
}


-(void)animatedResize{
    currentFunction = ExponentialEaseOut;
    CALayer *layer = [someImage layer];
    [CATransaction begin];
    [CATransaction setValue:[NSNumber numberWithFloat:10.0f] forKey:kCATransactionAnimationDuration];

    CAAnimation *chase =[CAKeyframeAnimation animationWithKeyPath:@"sizeChange" function:currentFunction fromSize:CGSizeMake(300, 500) toSize:CGSizeMake(100, 100)];

    [chase setDelegate:self];
    [layer addAnimation:chase forKey:@"sizeChange"];
    [CATransaction commit];
}