UICollectionViewCell与AutoLayout无法在iOS 10中工作

Question

我正在尝试创建一个动态UICollectionView，其单元格根据其中的文本自动调整大小。但由于某些原因，我的自定义UICollectionViewCell将不会扩展到全宽。我使用SnapKit作为AutoLayout，我的所有观点都是基于代码的;没有xib或故事板。这是我目前得到的调试视图：

我希望单元格扩展整个宽度和高度以适应任何内容。这是我的 UICollectionViewController

上的一个片段

override func viewDidLoad() {
    super.viewDidLoad()

    self.title = "Home"

    let layout = UICollectionViewFlowLayout()
    layout.itemSize = CGSize(width: view.frame.width, height: view.frame.height)
    layout.scrollDirection = .vertical
    layout.estimatedItemSize = CGSize(width: 375, height: 250)

    collectionView = UICollectionView(frame: CGRect(x: 0, y: 0, width: view.frame.width, height: view.frame.height), collectionViewLayout: layout)
    collectionView.dataSource = self
    collectionView.delegate = self
    collectionView.backgroundColor = UIColor(red: 245/255, green: 245/255, blue: 245/255, alpha: 1)
    collectionView.register(HomeCollectionViewCell.self, forCellWithReuseIdentifier: reuseIdentifier)


    self.view.addSubview(collectionView)

}

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: reuseIdentifier, for: indexPath)

    // Configure the cell
    if let c = cell as? HomeCollectionViewCell {
        c.contentView.frame = c.bounds
        c.contentView.autoresizingMask = [.flexibleHeight, .flexibleWidth]
        configureCell(c, indexPath: indexPath)

    }

    return cell
}

func configureCell(_ cell: HomeCollectionViewCell, indexPath: IndexPath) {
    cell.setText(withTitle: items[(indexPath as NSIndexPath).section].title)
}

这是我的自定义 UICollectionViewCell

的片段

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

    self.contentView.autoresizingMask = [.flexibleHeight, .flexibleWidth]
    self.contentView.translatesAutoresizingMaskIntoConstraints = true
    self.contentView.bounds = CGRect(x: 0, y: 0, width: 99999, height: 99999)

    createTitle()

}

private func createTitle() {
    titleView = TTTAttributedLabel(frame: CGRect(x: 0, y: 0, width: contentView.frame.width, height: 56))
    titleView.tag = 1
    titleView.numberOfLines = 2
    titleView.delegate = self
    titleView.translatesAutoresizingMaskIntoConstraints = false

    contentView.addSubview(titleView)

    titleView.snp_updateConstraints(closure: {
        make in

        make.leading.trailing.equalTo(contentView).offset(10)
        make.top.equalTo(contentView).offset(10)
        make.bottom.equalTo(contentView).offset(-10)

    })
}

func setText(withTitle title:String, paragraph: String, image: String) {
    let titleAttributed = AttributedString(string: title, attributes: titleStringAttr)

    titleView.attributedText = titleAttributed
    titleView.sizeToFit()
}

我已经花了3天时间继续研究这个......任何建议都值得赞赏！

Answer 1

嗯，这不是一个真正的解决方案，但是TTTAttributedLabel做了一些黑魔法，导致AutoLayout无法正常工作。所以对我来说，我将TTTAttributedLabel更改为UILabel，它运行正常。

仅供参考我在SnapKit Github问题上发布了类似的问题;感谢robertjpayne提示（https://github.com/SnapKit/SnapKit/issues/261）