Set rounded corners on UIimage in UICollectionViewCell in swift

Question

I have a simple problem that I cannot find a solution to on google, the docs or here.

I have a Collectionview in my view controller. I have created a custom cell, DescriptionCell, that contains a UIImage. I want this image to have rounded corners. However, I don't know where to set the cornerradius on the UIImage layer. I have tried in the cells' awakeFromNib method, in the delegate method CellForRowAtIndexPath and overriden LayoutSubview in the cell but it does not work. Where should I put the code to set the radius for the UIImage?

To specify, I know how to create rounded corners of a UIImage. But if it is a subview of a Collectionview cell, I do not know where to set the cornerradius.

Here is code for my descriptionCell

class DescriptionCell: UICollectionViewCell {
    @IBOutlet weak var mImage: UIImageView!

    override func awakeFromNib() {
    //mImage.layer.cornerradius = 5 
    //Does not work, the image is still square in the cell
    }

And in the cellforRowAtIndePath

 func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
var cell = collectionView.dequeueReusableCellWithReuseIdentifier("descriptioncell", forIndexPath: indexPath) as! DescriptionCell
    //cell.mImage.layer.cornerradius = 5 
    //Does not work, the image is still square in the cell
return cell    
}

Thanks in advance!

Answer 1

Well you're using part of the code from the answer you said you were using. the other part is imageView.clipsToBounds = true

Update your awakeFromNib like this:

override func awakeFromNib() {
    mImage.layer.cornerRadius = 5 
    mimage.clipsToBounds = true
}

---

To make it a circle you need to set cornerRadius to half of the square height. In your cellForItemAtIndexPath add these lines:

cell.layoutIfNeeded()
cell.mImage.layer.cornerRadius = cell.mImage.frame.height/2

Update

To avoid layoutSubviews from being called twice, override layoutSubviews in your DescriptionCell class and put the code there:

override func layoutSubviews() {
    super.layoutSubviews()
    layoutIfNeeded()
    mImage.layer.cornerRadius = mImage.frame.height/2
}

Answer 2

Have you tried placing it inside the custom UICollectionViewCell's init function?

override init(frame: CGRect) {
    super.init(frame: frame)

    image.layer.masksToBounds = true
    image.layer.cornerRadius = 10
}

Answer 3

You can also create an extension like:

extension UIView {
    func addBorder(color: UIColor, cornerRadius: CGFloat = 10, borderWidth: CGFloat = 1.0) {
        layer.borderWidth = borderWidth;
        layer.borderColor = color.cgColor
        layer.cornerRadius = cornerRadius
        layer.masksToBounds = true
    }
}