- (UIImage *)drawImageBySize:(CGSize)size quality:(CGInterpolationQuality)quality
{
UIGraphicsBeginImageContextWithOptions(size, NO, 0.0);
CGContextRef context = UIGraphicsGetCurrentContext();
CGContextSetInterpolationQuality(context, quality);
[self drawInRect: CGRectMake (0, 0, size.width, size.height)];
UIImage *resizedImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return resizedImage;
}