IOS function - resize a UIimage(in C style) refer to http://stackoverflow.com/questions/3177579/displaying-images-in-fix-size

IOS function - resize a UIimage

UIImage* resizeImageToSize(UIImage* image, CGSize size)
{
    UIGraphicsBeginImageContext(size);
    
    CGContextRef ctx = UIGraphicsGetCurrentContext();
    
    //Account for flipped coordspace
    CGContextTranslateCTM(ctx, 0.0, size.height);
    CGContextScaleCTM(ctx, 1.0, -1.0);
    
    CGContextDrawImage(ctx,CGRectMake(0.0f, 0.0f, size.width, size.height), image.CGImage);
    
    UIImage* scaled = UIGraphicsGetImageFromCurrentImageContext();
    
    UIGraphicsEndImageContext();
    return scaled;
}