Simple resizing image

I've been trying to use a method commonly used to resize an image. Without using this method, here is the code that takes a url of an image.

NSData *data = [NSData dataWithContentsOfURL:url];
UIImage *img = [[UIImage alloc] initWithData:data];

cel开发者_运维知识库l.imageView.image = img;

This works fine. But when I try to use this method:

-(UIImage*)imageWithImage:(UIImage*)image scaledToSize:(CGSize)newSize;
{
    UIGraphicsBeginImageContext( newSize );
    [image drawInRect:CGRectMake(0,0,newSize.width,newSize.height)];
    UIImage* newImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return newImage;
}

and call it using this:

UIImage *scaledImage = [self imageWithImage:img scaledToSize:CGSizeMake(10.0f,10.0f)];

then putting into my table like this:

cell.imageView.image = scaledImage;

Nothing shows up. Is there something I'm missing here?

This is similar to Exporting customized UITableViewCells into UIImage

Here's what you need to do in your -imageWithImage:scaledToSize: method, modified from my answer to that question:

-(UIImage*)imageWithImage:(UIImage*)image scaledToSize:(CGSize)newSize
{
    // Create a bitmap context.
    CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
    CGContextRef bitmapContextForScaledImage = CGBitmapContextCreate(nil, newSize.width, newSize.height, 8, 0, colorSpace, kCGImageAlphaNone);
    CGColorSpaceRelease(colorSpace);

    // Draw the image's layer into the context.
    UIImageView * imageView = [[UIImageView alloc] initWithImage:image];
    [imageView.layer renderInContext:bitmapContextForCell];
    [imageView release];

    // Create a CGImage from the context.
    CGImageRef cgScaledImage = CGBitmapContextCreateImage(bitmapContextForScaledImage);

    // Create a UIImage from the CGImage.
    UIImage * scaledImage = [UIImage imageWithCGImage:cgScaledImage];

    // Clean up.
    CGImageRelease(cgScaledImage);
    CGContextRelease(bitmapContextForScaledImage);

    return scaledImage;
}