Question

我试图将我的对象传递到新视图，并且无法传递数据。它一直返回零。我尝试使用协议和委托来做到这一点，并且它也一直返回nil。我决定只在didSelectRowAt中传递数据，但是在加载新视图时，它不会显示正确的信息。它返回nil。我试图通过仅传递名称来测试它。我不确定在这里我到底在做什么错。 currentUser和name都返回nil

class HomeVC: {
    var sortedArr = [Response.Users]()

    func showDetail() {
        let modalViewController = DetailView()
        modalViewController.modalPresentationStyle = .overCurrentContext
        present(modalViewController, animated: true) {
        }
    }

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: cellID, for: indexPath) as! UserTableCell
        let arr = sortedArr[indexPath.row]
        cell.titleLabel.text = arr.fullName
        return cell
    }
    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        let arr = sortedArr[indexPath.row]

        let detailVC = DetailView()
        detailVC.currentUser = [arr]
        detailVC.name = arr.fullName
        showDetail()
    }
}
class DetailView: UIViewController {

    var currentUser: [Response.Users]!
    var name: String?

    override func viewDidLoad() {
        print(name)
        print(currentUser)
        super.viewDidLoad()
    }
}

Answer 1

您在didSelectRowAt内部创建了一个对象，然后调用方法showDetail()，在该方法中，您将创建一个相同方法的新实例，然后在最后一个未设置与之相关的值的实例中进行推送 currentUser和名称，然后如何获取值

更改didSelectRowAt方法

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    let arr = sortedArr[indexPath.row]

    let detailVC = DetailView()
    detailVC.currentUser = [arr]
    detailVC.name = arr.fullName
    detailVC.modalPresentationStyle = .overCurrentContext
    present(detailVC, animated: true) {
    }
}

Answer 2

您只需要将didVC方法的detailVC对象传递给函数showDetail（）的参数。

请尝试一下

class HomeVC: {
    var sortedArr = [Response.Users]()

    func showDetail(detailVC: DetailView) {
        detailVC.modalPresentationStyle = .overCurrentContext
        present(detailVC, animated: true) {
        }
    }

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: cellID, for: indexPath) as! UserTableCell
        let arr = sortedArr[indexPath.row]
        cell.titleLabel.text = arr.fullName
        return cell
    }
    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        let arr = sortedArr[indexPath.row]

        let detailVC = DetailView()
        detailVC.currentUser = [arr]
        detailVC.name = arr.fullName
        showDetail(detailVC: detailVC)
    }
}
class DetailView: UIViewController {

    var currentUser: [Response.Users]!
    var name: String?

    override func viewDidLoad() {
        print(name)
        print(currentUser)
        super.viewDidLoad()
    }
}

didSelectRowAt将数据传递到新视图

2 个答案: