Spin Animation Resets to Original Image

For fun I have been trying to get a lottery wheel type object set up using Xcode in objective c. So far I have been able to successfully spin the object with random rotations, and stopping at 1 of 8 items on the wheel.

The problem is, I am not sure how to "save" the animation layer that is spun. Each time I spin the wheel, once the animation is completed it resets and shows the image in the original orientation. Below is the code I have setup for spinning the wheel. (NOTE: in this code I merely just have a set rotation. this is the template I am working with to try and retain the image. The other code is in a different project that stores the stopping point and corrects it to the center of on of those objects.)

ViewController.m

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

#define SPIN_CLOCK_WISE 1
#define SPIN_COUNTERCLOCK_WISE -1

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
}

- (IBAction)spinButton:(id)sender {
    [self spinLayer:_spinImage.layer duration:10 direction:SPIN_CLOCK_WISE];

}


- (void)spinLayer:(CALayer *)inLayer duration:(CFTimeInterval)inDuration
        direction:(int)direction
{
    CABasicAnimation* rotationAnimation;

    // Rotate about the z axis
    rotationAnimation =
    [CABasicAnimation animationWithKeyPath:@"transform.rotation.z"];

    // Rotate 360 degress, in direction specified
    rotationAnimation.toValue = [NSNumber numberWithFloat: M_PI * 22.3 * direction];

    // Perform the rotation over this many seconds
    rotationAnimation.duration = inDuration;

    // Set the pacing of the animation
    rotationAnimation.timingFunction =
    [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];

    // Add animation to the layer and make it so
    [inLayer addAnimation:rotationAnimation forKey:@"rotationAnimation"];

    // Save animation
//%%%%%%%%%%  THIS IS WHERE I AM STUCK!! %%%%%%%%%
}
- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

If someone could just help me retain the spun image so that once the spinLayer method completes, the image stays rotated to the new spin orientation, I would greatly appreciate it. Thanks!

via Chebli Mohamed