UITableView

懒加载

lazy var mainView: UITableView = {
    let view = UITableView(frame: CGRect(x: 0, y: 0, width: kScreenWidth, height: kScreenHeight - kTopHeight), style: .plain)
    view.delegate = self
    view.dataSource = self
    view.tableHeaderView = UIView()
    view.tableFooterView = UIView()
    view.register(UITableViewCell.self, forCellReuseIdentifier: "Cell")
    view.separatorStyle = .none
    view.backgroundColor = .white
    view.rowHeight = 44
    view.showsHorizontalScrollIndicator = false
    view.showsVerticalScrollIndicator = false
    if #available(iOS 11.0, *) {
        // 底部空余安全距离
        view.contentInsetAdjustmentBehavior = .never
        view.estimatedRowHeight = 0
        view.estimatedSectionHeaderHeight = 0
        view.estimatedSectionFooterHeight = 0
    } else {
        self.automaticallyAdjustsScrollViewInsets = false
    }
    if #available(iOS 15.0, *) {
        UITableView.appearance().sectionHeaderTopPadding = 0
    }
    return view
}()

实现代理协议

extension MineViewController: UITableViewDelegate, UITableViewDataSource {
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return 30
    }
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "Cell")!
        cell.textLabel?.text = "测试"
        //cell.selectionStyle = .none
        return cell
    }
    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        tableView .deselectRow(at: indexPath, animated: true)
    }
}

添加到视图

self.view.addSubview(self.mainView)

UICollectionView

懒加载

lazy var mainView: UICollectionView = {
    let layout = UICollectionViewFlowLayout()
    layout.scrollDirection = .horizontal
    layout.itemSize = CGSize(width: 100, height: 137)
    layout.minimumInteritemSpacing = 0
    layout.minimumLineSpacing = 12
    layout.sectionInset = UIEdgeInsets(top: 0, left: 20, bottom: 0, right: 20)
    
    let view = UICollectionView(frame: CGRect(x: 0, y: 57, width: kScreenWidth, height: 137), collectionViewLayout: layout)
    view.delegate = self
    view.dataSource = self
    view.backgroundColor = .white
    if #available(iOS 11.0, *) {
        view.contentInsetAdjustmentBehavior = .never
    } else {
        automaticallyAdjustsScrollViewInsets = false
    }
    return view
}()

实现代理协议

extension RecXiangYuHaoCell: UICollectionViewDelegate, UICollectionViewDataSource {
    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return 10
    }
    
    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: String(describing: UICollectionViewCell.self), for: indexPath)
        cell.contentView.backgroundColor = kRandomColor()
        return cell
    }
}

添加到视图

addSubview(mainView)
// registerCell
mainView.register(UICollectionViewCell.self, forCellWithReuseIdentifier: String(describing: UICollectionViewCell.self))