223 +(UIImage *)whiteImage:(CGSize) ofSize {

   224     // white rounded rectangle as background image for previewButton

   225     UIGraphicsBeginImageContext(ofSize);

   226     CGContextRef context = UIGraphicsGetCurrentContext();

   227     UIGraphicsPushContext(context);

   228 

   229     CGContextSetRGBFillColor(context, 1.0, 1.0, 1.0, 1.0);

   230     CGContextFillRect(context,CGRectMake(0,0,ofSize.width,ofSize.height));

   231 

   232     UIGraphicsPopContext();

   233     UIImage *bkgImg = UIGraphicsGetImageFromCurrentImageContext();

   234     UIGraphicsEndImageContext();

   235     return bkgImg;

   236 }

   237