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ios - 在 Swift 中单击表视图单元格时如何显示新的视图控制器

问题描述

单击表格视图单元格时，我试图显示一个新的视图控制器。但我的问题是当我单击表格视图单元格时，新的视图控制器不会出现。我已经看过关于 SO 的解决方案，但没有奏效。

这是故事板的屏幕截图在此处输入图像描述

这是相关的代码：

import UIKit

class RestaurantTableViewController: UITableViewController {

    let cellIdentifier: String = "restaurantCell"


    override func viewDidLoad() {
        super.viewDidLoad()
        self.tableView.delegate = self
    }

    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        if segue.identifier == "restaurantSegue" {
            let storyboard = UIStoryboard(name: "Main", bundle: nil)
            let destination = storyboard.instantiateViewController(withIdentifier: "RestaurantInfoViewController") as! RestaurantInfoViewController
            navigationController?.pushViewController(destination, animated: true)
        }
    }
}

extension RestaurantTableViewController {

    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return 0
    }

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

        return cell
    }

    override func tableView(_ tableView: UITableView, canEditRowAt indexPath: IndexPath) -> Bool {
        // Return false if you do not want the specified item to be editable.
        return true
    }

    override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        self.performSegue(withIdentifier: "restaurantSegue", sender: self)
    }

}

注意：我还遵循了Apple's guide链接中的 Apple 文档。但这也不起作用

标签： iosswiftuitableview

解决方案

According to the screenshot the segue is connected to the table view cell.

If so delete didSelectRowAt because the segue is performed directly

 override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    self.performSegue(withIdentifier: "restaurantSegue", sender: self)
}

The second issue is if you are using a segue you must not call instantiateViewController.

If you don't have to pass data to the next view controller you can even delete

 override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    if segue.identifier == "restaurantSegue" {
        let storyboard = UIStoryboard(name: "Main", bundle: nil)
        let destination = storyboard.instantiateViewController(withIdentifier: "RestaurantInfoViewController") as! RestaurantInfoViewController
        navigationController?.pushViewController(destination, animated: true)
    }
}

Otherwise get the destination controller from the segue in prepare(for and use that.

If the segue is still not performed then there's something wrong with the identifier.

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