objective c - Resize UIImageView in UITableViewCell

Question

I have a 16x16 pixel image that I want to display in an UIImageView. So far, no problem, however 16x16 is a bit small so I want to resize the image view to 32x32 and thus also scale the image up. But I can't get it to work, it always shows the image with 16x16, no matter what I try. I googled a lot, and found many snippets here on Stack Overflow, but its still doesn't work. Here is my code so far:

[[cell.imageView layer] setMagnificationFilter:kCAFilterNearest];
[cell.imageView setAutoresizingMask:UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight];
[cell.imageView setClipsToBounds:NO];
[cell.imageView setFrame:CGRectMake(0, 0, 32, 32)];
[cell.imageView setBounds:CGRectMake(0, 0, 32, 32)];
[cell.imageView setImage:image];

I don't want to create a new 32x32 pixel image because I already have some memory problems on older devices and creating two images instead of having just one looks like a very bad approach to me (the images can be perfectly scaled and it doesn't matter if they lose quality).

Answer 1

I have successfully made it using CGAffineTransformMakeScale!

cell.imageView.image = cellImage;
//self.rowWidth is the desired Width
//self.rowHeight is the desired height
CGFloat widthScale = self.rowWidth / cellImage.size.width;
CGFloat heightScale = self.rowHeight / cellImage.size.height;
//this line will do it!
cell.imageView.transform = CGAffineTransformMakeScale(widthScale, heightScale);