ios - 框架未正确更新为UICollectionView作为UITableViewCell subview

我将UICollectionView放在自定义UITableView中。 UICollectionView框架设置为contentView边界，但是并没有完全使用它。

CellForRowAtIndexPath

if indexPath.row == 0 {
    let cell = tableView.dequeueReusableCell(withIdentifier: "collectionViewCell") as! TravelTypeTableViewCell
    cell.backgroundColor = .green
    return cell
} else {
    let cell = tableView.dequeueReusableCell(withIdentifier: "cell")!
    cell.textLabel?.text = "adsf"
    return cell
}

TableViewCell

override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
    super.init(style: style, reuseIdentifier: reuseIdentifier)

    let layout = UICollectionViewFlowLayout()
    collectionView = UICollectionView(frame: self.contentView.bounds, collectionViewLayout: layout)
    collectionView.delegate = self
    collectionView.dataSource = self
    collectionView.register(UICollectionViewCell.self, forCellWithReuseIdentifier: "CollectionViewCell")
    collectionView.backgroundColor = .clear
    self.addSubview(collectionView)

    collectionView.leftAnchor.constraint(equalTo: self.contentView.leftAnchor, constant:0).isActive = true
    collectionView.rightAnchor.constraint(equalTo: self.contentView.rightAnchor, constant:0).isActive = true
    collectionView.topAnchor.constraint(equalTo: self.contentView.topAnchor, constant:0).isActive = true
    collectionView.bottomAnchor.constraint(equalTo: self.contentView.bottomAnchor, constant:0).isActive = true
}

输出用户界面

最佳答案

如果使用约束，则无需为收集视图提供框架。

override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
    super.init(style: style, reuseIdentifier: reuseIdentifier)

    let layout = UICollectionViewFlowLayout()
    let collectionView = UICollectionView(frame: .zero, collectionViewLayout: layout) // no need to give frame as you are adding constraints
    collectionView.delegate = self
    collectionView.dataSource = self
    collectionView.register(UICollectionViewCell.self, forCellWithReuseIdentifier: "CollectionViewCell")
    collectionView.backgroundColor = .clear
    self.contentView.addSubview(collectionView)


    collectionView.leftAnchor.constraint(equalTo: self.contentView.leftAnchor, constant:0).isActive = true
    collectionView.rightAnchor.constraint(equalTo: self.contentView.rightAnchor, constant:0).isActive = true
    collectionView.topAnchor.constraint(equalTo: self.contentView.topAnchor, constant:0).isActive = true
    collectionView.bottomAnchor.constraint(equalTo: self.contentView.bottomAnchor, constant:0).isActive = true

}

关于ios - 框架未正确更新为UICollectionView作为UITableViewCell subview ，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/59854176/