如何在没有Storyboard或笔尖的情况下使用图像初始化collectionViewCell？

Question

How to init collection view Cell with image without Storyboard or nib ?

I'm building ImagePicker and want to do it without storyboards

so the working code with storyboard is like that, but how to do it programmatically ?

class PhotosCollectionViewCell: UICollectionViewCell {
    @IBOutlet weak var imageView: UIImageView!

    var image: UIImage? {
        get { return imageView.image }
        set { imageView.image = newValue }
    }

    override func prepareForReuse() {
        super.prepareForReuse()
        self.imageView.image = nil
    }

}

My changed code without IBOutlet:

class PhotosCollectionViewCell: UICollectionViewCell {
    var imageView: UIImageView!
    public var asset: PHAsset!
    public var cellTappedAction: ((PHAsset) -> ()) = { _ in }

    var image: UIImage? {
        get { return imageView.image }
        set { imageView.image = newValue }
    }

    override init(frame: CGRect) {
      self.imageView = UIImageView()
      super.init(frame: frame)
        self.imageView.image = self.image
        self.imageView.frame = self.frame
        self.addSubview(self.imageView)
    }

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
//        fatalError("init(coder:) has not been implemented")
    }

    override func prepareForReuse() {
        super.prepareForReuse()
        self.imageView.image = nil
    }
}

Controller:

self.collectionView?.register(PhotosCollectionViewCell.self, forCellWithReuseIdentifier: "Cell")

So the first picture without IBOutlet and the second one with it

Answer 1

Register your class in viewDidLoad()

collectionView.register(PhotosCollectionViewCell.self, forCellReuseIdentifier: "photosCell")

Dequeue your cell in cellForItem and configure cell's subviews

let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "photosCell", for: indexPath)
// configure cell subviews

Remember to init your subview in PhotosCollectionViewCell as you won't be using IBOulets

override init(frame: CGRect) {
    super.init(frame: frame)
    imageView.frame = contentView.bounds
    self.contentView.addSubview(imageView)
}

Answer 2

If you are trying to initialize your cell class with a certain image you should be able to do so by overriding the init method

override init(frame: CGRect) {
    super.init(frame: frame)
    //set initial image here
}