Question

import UIKit

class ServicesTableViewController: UITableViewController {
    var services = [Service]()

    override func viewDidLoad() {
        super.viewDidLoad()
        //load services data
        loadServices()
    }

    private func loadServices(){
        let photo1 = UIImage(named: "blank")
        let photo2 = UIImage(named: "blank1")
        let photo3 = UIImage(named: "blank2")

        guard let Service1 = Service(titled: "blank", description:"Test", imageName: photo1) else {
            fatalError("Unable to instantiate Service1")
        }
        guard let Service2 = Service(titled: "blank1", description:"Test", imageName: photo2) else {
            fatalError("Unable to instantiate Service1")
        }
        guard let Service3 = Service(titled: "blank2", description:"Test", imageName: photo3) else {
            fatalError("Unable to instantiate Service1")
        }
        services += [Service1,Service2,Service3]

    }

    // MARK: - Table view data source

    override func numberOfSections(in tableView: UITableView) -> Int {
        return 1
    }

    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return services.count
    }

    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        // Table view cells are reused and should be dequeued using a cell identifier.
        let cellIdentifier = "ServicesTableViewCell"

        guard let cell = tableView.dequeueReusableCell(withIdentifier: cellIdentifier, for: indexPath) as? ServicesTableViewCell  else {
            fatalError("The dequeued cell is not an instance of ServicesTableViewCell.")
        }

        // Fetches the appropriate service for the data source layout.
        let services = Service[indexPath.row]

        cell.titleLabel.text = service.titled
        cell.photoImageView.image = service.image
        cell.descriptionLabel.text = service.description

        return cell
    }

我一直收到错误Service.type没有下标成员。我试图将这些数据输入到表视图控制器中，这是表视图控制器内部的代码，如果需要，我也可以发布单元代码和service.swift文件。

Answer 1

你应该改变这个：

let services = Service[indexPath.row] // this is a class, not an array

in

let service = services[indexPath.row]

我也看到你初始化Service传递了一个名为imageName UIImage类型的参数，所以它可能会让你感到困惑，我想你的问题可能会有问题cellForRowAt 1}}，因为：

cell.photoImageView.image = service.image

因此，请确保您已在Service中声明了此类属性（image！= imageName）。

Service.type没有下标成员

1 个答案: