UICollectionView中的IBOutlets是nil-Swift

当我打印我在MyCell类中声明的IBOutlets时,它们就是零.

ViewController中的方法

public override func viewDidLoad() {
    super.viewDidLoad()
    self.seriesCollectionView.register(MyCell.self, forCellWithReuseIdentifier: "MyCell")
}

public func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "MyCell", for: indexPath) as! MyCell
    cell.setup()

    return cell
}

MyCell类

class MTSeriesViewCell: UICollectionViewCell {
@IBOutlet weak var cellView: UIView!

@IBOutlet weak var cellImageView: UIImageView!
override func awakeFromNib() {
    super.awakeFromNib()
}

public func setup() {
    print(cellView)
}

}

我是否应该在ViewController的viewDidLoad中初始化/注册MyCell类？

代替:

self.seriesCollectionView.register(MyCell.self, forCellWithReuseIdentifier: "MyCell")

使用:

self.seriesCollectionView.register(UINib(nibName: "MyCellXibName", bundle: nil), forCellWithReuseIdentifier: "MyCell")