swift Xcode中的节和单元

我是一名新手应用程序开发人员，在应用程序中显示多个分区和单元格时遇到问题。显示2个分区、第一个分区3个单元格和第二个分区2个单元格的最佳方式是什么？

只需处理numberOfRowsInSection-

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        if section == 0{
           return 3
        }else{
            return 2
        }
    }     


 func numberOfSections(in tableView: UITableView) -> Int {

       return 2

   }

---

你要做这样的事。只需确保将

YourCellIdentifier

和

YourCellClass

替换为您所拥有的内容即可

class TableViewController: UITableViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
    }

    override func numberOfSections(in tableView: UITableView) -> Int {
        return 2
    }

    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        if section == 0 {
            return 3
        } else if section == 1 {
            return 2
        }
        return 0
    }

    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(
            withIdentifier: "YourCellIdentifier", for: indexPath) as! YourCellClass

        // configure your cell here

        return cell
    }
}

下面是截面表的完整示例

结果是

这相当容易

创建一个将成为TableViewController子类的类。最好的方法是单击command+N，选择CoCoTouch类，然后命名类并在“的子类”部分选择“UITableViewController”。结果类的名称如下：

在类中，在“numberOfSections”函数中定义所需的节数，如下所示：

在numberOfRowsInSection方法中定义所需的单元格数，如下所示：

在cellForRowAt indexPath方法中填充单元格。下面的代码将返回标识其在各自部分中位置的单元格。别忘了在Main.storyboard中将单元格的名称设置为“informationCell”

---

如果您还有其他问题，请告诉我。祝你学习顺利

您需要显示一些代码来显示您正在尝试执行的操作。并解释什么exa玩具不起作用。谢谢！这也很有帮助~

let MovieData = [
      ["title": "Jason Bourne", "cast": "Matt Damon, Alicia Vikander, Julia Stiles", "genre": "action"],
      ["title": "Suicide Squad", "cast": "Margot Robbie, Jared Leto, Will Smith", "genre": "action"],
      ["title": "Star Trek Beyond", "cast": "Chris Pine, Zachary Quinto, Zoe Saldana", "genre": "action"],
      ["title": "Deadpool", "cast": "Ryan Reynolds, Morena Baccarin, Gina Carano", "genre": "action"],
      ["title": "London Has Fallen", "cast": "Gerard Butler, Aaron Eckhart, Morgan Freeman, Angela Bassett", "genre": "action"],
      ["title": "Ghostbusters", "cast": "Kate McKinnon, Leslie Jones, Melissa McCarthy, Kristen Wiig", "genre": "comedy"],
      ["title": "Central Intelligence", "cast": "Dwayne Johnson, Kevin Hart", "genre": "comedy"],
      ["title": "Bad Moms", "cast": "Mila Kunis, Kristen Bell, Kathryn Hahn, Christina Applegate", "genre": "comedy"],
      ["title": "Keanu", "cast": "Jordan Peele, Keegan-Michael Key", "genre": "comedy"],
      ["title": "Neighbors 2: Sorority Rising", "cast": "Seth Rogen, Rose Byrne", "genre": "comedy"],
      ["title": "The Shallows", "cast": "Blake Lively", "genre": "drama"],
      ["title": "The Finest Hours", "cast": "Chris Pine, Casey Affleck, Holliday Grainger", "genre": "drama"],
      ["title": "10 Cloverfield Lane", "cast": "Mary Elizabeth Winstead, John Goodman, John Gallagher Jr.", "genre": "drama"],
      ["title": "A Hologram for the King", "cast": "Tom Hanks, Sarita Choudhury", "genre": "drama"],
      ["title": "Miracles from Heaven", "cast": "Jennifer Garner, Kylie Rogers, Martin Henderson", "genre": "drama"],
    ]

    class ViewController: UIViewController {

      @IBOutlet weak var tableView: UITableView!

      // The magic enum to end our pain and suffering!
      // For the most part the order of our cases do not matter.
      // What is important is that our first case is set to 0, and that our last case is always `total`.
      enum TableSection: Int {
        case action = 0, comedy, drama, indie, total
      }

      // This is the size of our header sections that we will use later on.
      let SectionHeaderHeight: CGFloat = 25

      // Data variable to track our sorted data.
      var data = [TableSection: [[String: String]]]()

      override func viewDidLoad() {
        super.viewDidLoad()
        sortData()
      }

      override func viewDidAppear(_ animated: Bool) {
        super.viewDidAppear(animated)
        tableView.reloadData()
      }

      // When generating sorted table data we can easily use our TableSection to make look up simple and easy to read.
      func sortData() {
        data[.action] = MovieData.filter({ $0["genre"] == "action" })
        data[.comedy] = MovieData.filter({ $0["genre"] == "comedy" })
        data[.drama] = MovieData.filter({ $0["genre"] == "drama" })
        data[.indie] = MovieData.filter({ $0["genre"] == "indie" })
      }

    }

    extension ViewController: UITableViewDataSource, UITableViewDelegate {

      // As long as `total` is the last case in our TableSection enum,
      // this method will always be dynamically correct no mater how many table sections we add or remove.
      func numberOfSections(in tableView: UITableView) -> Int {
        return TableSection.total.rawValue
      }

      func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        // Using Swift's optional lookup we first check if there is a valid section of table.
        // Then we check that for the section there is data that goes with.
        if let tableSection = TableSection(rawValue: section), let movieData = data[tableSection] {
          return movieData.count
        }
        return 0
      }

      func tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat {
        // If we wanted to always show a section header regardless of whether or not there were rows in it,
        // then uncomment this line below:
        //return SectionHeaderHeight

        // First check if there is a valid section of table.
        // Then we check that for the section there is more than 1 row.
        if let tableSection = TableSection(rawValue: section), let movieData = data[tableSection], movieData.count > 0 {
          return SectionHeaderHeight
        }
        return 0
      }

      func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
        let view = UIView(frame: CGRect(x: 0, y: 0, width: tableView.bounds.width, height: SectionHeaderHeight))
        view.backgroundColor = UIColor(red: 253.0/255.0, green: 240.0/255.0, blue: 196.0/255.0, alpha: 1)
        let label = UILabel(frame: CGRect(x: 15, y: 0, width: tableView.bounds.width - 30, height: SectionHeaderHeight))
        label.font = UIFont.boldSystemFont(ofSize: 15)
        label.textColor = UIColor.black
        if let tableSection = TableSection(rawValue: section) {
          switch tableSection {
          case .action:
            label.text = "Action"
          case .comedy:
            label.text = "Comedy"
          case .drama:
            label.text = "Drama"
          case .indie:
            label.text = "Indie"
          default:
            label.text = ""
          }
        }
        view.addSubview(label)
        return view
      }

      func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath)
        // Similar to above, first check if there is a valid section of table.
        // Then we check that for the section there is a row.
        if let tableSection = TableSection(rawValue: indexPath.section), let movie = data[tableSection]?[indexPath.row] {
          if let titleLabel = cell.viewWithTag(10) as? UILabel {
            titleLabel.text = movie["title"]
          }
          if let subtitleLabel = cell.viewWithTag(20) as? UILabel {
            subtitleLabel.text = movie["cast"]
          }
        }
        return cell
      }

    }

    class NewsViewController: UITableViewController 

    override func numberOfSections(in tableView: UITableView) -> Int {
        return 2
    }

    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        if section == 0 {
            return 3
        } else {
            return 2
        }
    }

    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "informationCell", for: indexPath)

        cell.textLabel?.text = "This is a cell with ID: \(indexPath.row)"

        return cell
    }