Renders all the sublayers of all the subviews within a specified view to file

gistfile1.txt

static NSString *dir = @"/Users/liam.nichols/Desktop/layers/";

-(void)sublayersToFile
{
    for (UIWindow *window in [[UIApplication sharedApplication] windows])
    {
        if ([window isKindOfClass:NSClassFromString(@"UITextEffectsWindow")])
        {
            [self subviewsInView:window];
            break;
        }
    }
}

-(void)subviewsInView:(UIView *)superview
{
    for (UIView *view in superview.subviews)
    {
        [self getLayers:view];
        [self subviewsInView:view];
    }
}

-(void)getLayers:(UIView *)view
{
    NSArray *sublayers = view.layer.sublayers;
    
    for (CALayer *layer in sublayers)
    {
        @autoreleasepool
        {
            NSLog(@"Working on layer: %p",layer);
            
            UIImage *image = [self imageFromLayer:layer];
            
            NSString *filename = [dir stringByAppendingPathComponent:[NSString stringWithFormat:@"%p.png",layer]];
            
            [UIImagePNGRepresentation(image) writeToFile:filename atomically:YES];
            
        }
    }
    
}

- (UIImage *)imageFromLayer:(CALayer *)layer
{
    UIGraphicsBeginImageContextWithOptions([layer frame].size, NO, 0);
    
    [layer renderInContext:UIGraphicsGetCurrentContext()];
    UIImage *outputImage = UIGraphicsGetImageFromCurrentImageContext();
    
    UIGraphicsEndImageContext();
    
    return outputImage;
}