gistfile1.m

-(void) viewWillLayoutSubviews {
    int margin = 10;
    // Text view
    int h = 80;
    int x = margin;
    int y = self.view.frame.size.height - margin - h;
    int w = self.view.frame.size.width - (2 * margin);
    self.descriptionView.frame = CGRectMake(x, y, w, h);
    // Screenshot
    int targetZoneHeight = y - margin;
    CGRect targetZone = CGRectMake(margin, margin, w, targetZoneHeight);
    CGSize imageSize = self.screenshotView.image.size;
    self.screenshotView.frame = AVMakeRectWithAspectRatioInsideRect(imageSize, targetZone);
}