Adjusting size of in app screenshot

I am having problem in taking a screenshot with specific area.
I have a tabbar at the bottom and a toolbar at the top. I would like to take a screenshot of the screen between those two bars. Below is my code. How can i improve my code to crop out the bars?


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  • CGSize imageSize = [[UIScreen mainScreen] bounds].size;
    if (NULL != UIGraphicsBeginImageContextWithOptions)
        UIGraphicsBeginImageContextWithOptions(imageSize, NO, 0);
    CGContextRef context = UIGraphicsGetCurrentContext();
    // Iterate over every window from back to front
    for (UIWindow *window in [[UIApplication sharedApplication] windows]) 
        if (![window respondsToSelector:@selector(screen)] || [window screen] == [UIScreen mainScreen])
            // -renderInContext: renders in the coordinate space of the layer,
            // so we must first apply the layer's geometry to the graphics context
            // Center the context around the window's anchor point
            CGContextTranslateCTM(context, [window center].x, [window center].y);
            // Apply the window's transform about the anchor point
            CGContextConcatCTM(context, [window transform]);
            // Offset by the portion of the bounds left of and above the anchor point
                                  -[window bounds].size.width * [[window layer] anchorPoint].x,
                                  -[window bounds].size.height * [[window layer] anchorPoint].y);
            // Render the layer hierarchy to the current context
            [[window layer] renderInContext:context];
            // Restore the context
    // Retrieve the screenshot image
    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
    UIImageWriteToSavedPhotosAlbum(image, self, @selector(imageSavedToPhotosAlbum: didFinishSavingWithError: contextInfo:), nil);

    2 Solutions Collect From Internet About “Adjusting size of in app screenshot”

    I suppose you could try cropping out the part you need after creating the final UIImage.

    CGRect contentRectToCrop = CGRectMake(0, 44, 320, 392);
    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
    CGImageRef imageRef = CGImageCreateWithImageInRect([image CGImage], contentRectToCrop);
    UIImage *croppedImage = [UIImage imageWithCGImage:imageRef];

    Untested sugestion:

    imageSize.origin.y+=44; //toolbar size
    imageSize.size.height-=88; //tabbar+toolbar size