ios - TableView array segue 不会传递数据

Question

我无法将数据从我的 TableView 中的选定行传递到另一个 ViewController。

class SectionsTableViewController: UITableViewController {


var sections: [Sections] = SectionsData().getSectionsFromData()

override func viewDidLoad() {
    super.viewDidLoad()

}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

// MARK: - Table view data source

override func numberOfSections(in tableView: UITableView) -> Int {
    // #warning Incomplete implementation, return the number of sections
    return sections.count
}

override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    // #warning Incomplete implementation, return the number of rows
    return sections[section].items.count
}


override func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
    return sections[section].headings
}

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

    // Configure the cell...
    cell.textLabel?.text = sections[indexPath.section].items[indexPath.row]

    return cell
}



override func prepare(for segue: UIStoryboardSegue, sender: Any?)
{
    if (segue.identifier == "sectionCell")
    {
        let upcoming: Sjekkliste = segue.destination as! Sjekkliste

        let indexPath = self.tableView.indexPathForSelectedRow!

        let titleString = Sections(title: "", objects: [""]) as? String

        upcoming.titleString = titleString

        self.tableView.deselectRow(at: indexPath, animated: true)
        }

这就是我的问题所在:let titleString = Sections(title: "", objects: [""]) as?字符串

如果标题和对象分开传递会更好。

这是我的数据设置:

class SectionsData {
var myArray: [AnyObject] = []

func getSectionsFromData() -> [Sections] {

    var sectionsArray = [Sections]()

    let Generell = Sections(title: "Animals", objects:
        ["Cat", "Dog", "Lion", "Tiger"]) 
    sectionsArray.append(Generell)
    return sectionsArray

Answer 1

这一行建议您将 String 子类化为 Sections。你为什么要子类化字符串？如果 Sections 不是 string 的子类，则此行将失败。

let titleString = Sections(title: "", objects: [""]) as? String

我假设你想要类似这样的东西:

let selectedSection:Sections = Sections(title: "", objects: [""])
upcoming.titleString = selectedSection.title

上面建议 Sections 对象上的“title”属性是您要设置为下一个 View Controller 的“titleString”属性的内容。

与原始问题无关，您应该将“Generell”小写。最佳实践建议只有类名应该以大写字母开头。我还建议实现 didSelectRow 方法来选择数据。结果应与此类似:

var selectedSection:Sections? //goes at top

public func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    tableView.deselectRow(at: indexPath, animated: true)
    self.selectedSection = self.sections[indexPath.section]
}

override func prepare(for segue: UIStoryboardSegue, sender: Any?){
 if (segue.identifier == "sectionCell"){
    let upcoming: Sjekkliste = segue.destination as! Sjekkliste
    if let section = self.selectedSection{
        upcoming.titleString = section.title
    }
 }
}