Three way to create UIView snapshot containing SpriteKit content.

EPPZWrapperView.m

-(UIImage*)snapshotUsingPrivateApi
{
    // Works fine, but private.
    CGImageRef snapshot = UIGetScreenImage();
    UIImage *snapshotImage = [UIImage imageWithCGImage:snapshot];
    return snapshotImage;
}

-(UIImage*)snapshotUsingDrawHierarchy
{
    // Captures SpriteKit content!
    UIGraphicsBeginImageContextWithOptions(self.bounds.size, NO, [UIScreen mainScreen].scale);
    [self drawViewHierarchyInRect:self.bounds afterScreenUpdates:YES];
    UIImage *snapshotImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return snapshotImage;
}

-(UIImage*)snapshotUsingLayer
{
    // Captures UIKit content only.
    UIGraphicsBeginImageContextWithOptions(self.bounds.size, NO, [UIScreen mainScreen].scale);
    [self.layer renderInContext:UIGraphicsGetCurrentContext()];
    UIImage *snapshotImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return snapshotImage;
}