Potential leak of an object stored into 'imageCrop'

This code running fine but when analyze it shows potential memory leaks. It seems that 'imageCrop' has potential memory leak. Your help is highly appreciated. Thanks.

-(CATransformLayer *)transformLayerFromImage:(UIImage *)image Frame:(CGRect)frame Duration:(CGFloat)duration AnchorPiont:(CGPoint)anchorPoint StartAngle:(double)start EndAngle:(double)end { CATransformLayer *jointLayer = [CATransformLayer layer]; jointLayer.anchorPoint = anchorPoint; CALayer *imageLayer = [CALayer layer]; CAGradientLayer *shadowLayer = [CAGradientLayer layer]; double shadowAniOpacity;

    if (anchorPoint.y == 0.5) {
        CGFloat layerWidth;
        if (anchorPoint.x == 0 ) //from left to right
        {
            layerWidth = image.size.width - frame.origin.x;
            jointLayer.frame = CGRectMake(0, 0, layerWidth, frame.size.height);
            if (frame.origin.x) {
                jointLayer.position = CGPointMake(frame.size.width, frame.size.height/2);
            }
            else {
                jointLayer.position = CGPointMake(0, frame.size.height/2);
            }
        }
        else { //from right to left
            layerWidth = frame.origin.x + frame.size.width;
            jointLayer.frame = CGRectMake(0, 0, layerWidth, frame.size.height);
            jointLayer.position = CGPointMake(layerWidth, frame.size.height/2);
        }

        //map image onto transform layer
        imageLayer.frame = CGRectMake(0, 0, frame.size.width, frame.size.height);
        imageLayer.anchorPoint = anchorPoint;
        imageLayer.position = CGPointMake(layerWidth*anchorPoint.x, frame.size.height/2);
        [jointLayer addSublayer:imageLayer];
        CGImageRef imageCrop = CGImageCreateWithImageInRect(image.CGImage, frame);
        imageLayer.contents = (__bridge id)imageCrop;
        imageLayer.backgroundColor = [UIColor clearColor].CGColor;

        //add shadow
        NSInteger index = frame.origin.x/frame.size.width;
        shadowLayer.frame = imageLayer.bounds;
        shadowLayer.backgroundColor = [UIColor darkGrayColor].CGColor;
        shadowLayer.opacity = 0.0;
        shadowLayer.colors = [NSArray arrayWithObjects:(id)[UIColor blackColor].CGColor, (id)[UIColor clearColor].CGColor, nil];
        if (index%2) {
            shadowLayer.startPoint = CGPointMake(0, 0.5);
            shadowLayer.endPoint = CGPointMake(1, 0.5);
            shadowAniOpacity = (anchorPoint.x)?0.24:0.32;
        }
        else {
            shadowLayer.startPoint = CGPointMake(1, 0.5);
            shadowLayer.endPoint = CGPointMake(0, 0.5);
            shadowAniOpacity = (anchorPoint.x)?0.32:0.24;
        }
    }
    else{
        CGFloat layerHeight;
        if (anchorPoint.y == 0 ) //from top
        {
            layerHeight = image.size.height - frame.origin.y;
            jointLayer.frame = CGRectMake(0, 0, frame.size.width, layerHeight);
            if (frame.origin.y) {
                jointLayer.position = CGPointMake(frame.size.width/2, frame.size.height);
            }
            else {
                jointLayer.position = CGPointMake(frame.size.width/2, 0);
            }
        }
        else { //from bottom
            layerHeight = frame.origin.y + frame.size.height;
            jointLayer.frame = CGRectMake(0, 0, frame.size.width, layerHeight);
            jointLayer.position = CGPointMake(frame.size.width/2, layerHeight);
        }

        //map image onto transform layer
        imageLayer.frame = CGRectMake(0, 0, frame.size.width, frame.size.height);
        imageLayer.anchorPoint = anchorPoint;
        imageLayer.position = CGPointMake(frame.size.width/2, layerHeight*anchorPoint.y);
        [jointLayer addSublayer:imageLayer];
        CGImageRef imageCrop = CGImageCreateWithImageInRect(image.CGImage, frame);
        imageLayer.contents = (__bridge id)imageCrop;
        imageLayer.backgroundColor = [UIColor clearColor].CGColor;

        //add shadow
        NSInteger index = frame.origin.y/frame.size.height;
        shadowLayer.frame = imageLayer.bounds;
        shadowLayer.backgroundColor = [UIColor darkGrayColor].CGColor;
        shadowLayer.opacity = 0.0;
        shadowLayer.colors = [NSArray arrayWithObjects:(id)[UIColor blackColor].CGColor, (id)[UIColor clearColor].CGColor, nil];
        if (index%2) {
            shadowLayer.startPoint = CGPointMake(0.5, 0);
            shadowLayer.endPoint = CGPointMake(0.5, 1);
            shadowAniOpacity = (anchorPoint.x)?0.24:0.32;
        }
        else {
            shadowLayer.startPoint = CGPointMake(0.5, 1);
            shadowLayer.endPoint = CGPointMake(0.5, 0);
            shadowAniOpacity = (anchorPoint.x)?0.32:0.24;
        }
    }

    [imageLayer addSublayer:shadowLayer];

    //animate open/close animation
    CABasicAnimation* animation = (anchorPoint.y == 0.5)?[CABasicAnimation animationWithKeyPath:@"transform.rotation.y"]:[CABasicAnimation animationWithKeyPath:@"transform.rotation.x"];
    [animation setDuration:duration];
    [animation setFromValue:[NSNumber numberWithDouble:start]];
    [animation setToValue:[NSNumber numberWithDouble:end]];
    [animation setRemovedOnCompletion:NO];
    [jointLayer addAnimation:animation forKey:@"jointAnimation"];

    //animate shadow opacity
    animation = [CABasicAnimation animationWithKeyPath:@"opacity"];
    [animation setDuration:duration];
    [animation setFromValue:[NSNumber numberWithDouble:(start)?shadowAniOpacity:0]];
    [animation setToValue:[NSNumber numberWithDouble:(start)?0:shadowAniOpacity]];
    [animation setRemovedOnCompletion:NO];
    [shadowLayer addAnimation:animation forKey:nil];

    return jointLayer;
}