Swift 4.2-如何从tableView中的“ didSelectRowAtIndexPath”方法调用“ indexPath.row”到另一个类?

时间:2018-12-25 17:31:02

标签: ios iphone swift

我有两个viewControllers。一个有一个tableView,其中有一个数组中的一些单元格。另一个是viewController,其中包含一个Webkit,我想展示一些本地HTML文件。另外,我将webKit页面定义为tableView的下一页。 我想要的是,当用户在tableView中选择一个单元格时,根据选择的单元格,它会转到webkit页面,并且运行部分代码以供用户显示特定的HTML。换句话说,我在tableViewCells中有5个HTML文件和5个项目 因此,例如,如果用户选择第一个项目,则HTML1会向他显示;如果选择第二个单元格,则会向他显示HTML2等。

我尝试了很多方法。但是什么也没发生。还尝试从tableview类创建实例对象... 在这里尝试了同样的问题ins StackOverFlow但没有成功

第一页:

var arr = ["masoud" , "hossein", "reza" , "shiva" , "fateme"]


 func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        print("item selected is : \(indexPath.row)")
       // if indexPath.row == 1 {

            performSegue(withIdentifier: "TableSegue", sender: nil)

        //}

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



    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {

        switch (segue.destination.view, segue.destination, sender) {

        case let (_, controller as WebKitController, indexPath as     NSIndexPath):
            controller.indexPath = indexPath
            break
        default:
            break
        }
    }

第二页:

import WebKit

class WebKitController: UIViewController, WKUIDelegate, WKNavigationDelegate {

    @IBOutlet weak var myWebKit: WKWebView!

    var reza : String = String()

    var indexPath: NSIndexPath? {

        didSet {
            reza = (indexPath?.row.description)!
            print(indexPath?.row as Any)

            self.myWebKit.uiDelegate = self
            self.myWebKit.navigationDelegate = self

        }

    }


    override func viewDidLoad() {
        super.viewDidLoad()
    let url = Bundle.main.url(forResource: "reza", withExtension: "html", subdirectory: "ReZeynoo2")!
                        myWebKit.loadFileURL(url, allowingReadAccessTo: url)
                        let request = URLRequest(url: url)
                        myWebKit.load(request)


        self.myWebKit.uiDelegate = self
        self.myWebKit.navigationDelegate = self
        }

3 个答案:

答案 0 :(得分:0)

您需要在Int类中以WebKitController创建一个selectedRow变量,其中将从表视图单元格选择中分配所选行,

// MARK: - Table view delegates
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    self.performSegue(withIdentifier: "TableSegue", sender: indexPath)
}

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    if segue.identifier == "TableSegue", let indexPath = sender as? IndexPath {
        let webController = segue.destination as? WebKitController
        webController.selectedRow = indexPath.row
    }
}

答案 1 :(得分:0)

我认为您可以将indexpath.row的值传递给perfomSegue的发件人,而您的第二个视图控制器只需使用

这是代码

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    performSegue(withIdentifier: "secondvc", sender: indexPath.row)
}

只需在发件人中发送indexpath.row

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    if segue.identifier == "secondvc"{
        let vc = segue.destination as! SecondViewController
        vc.row = sender as! Int
    }
}

答案 2 :(得分:0)

作为一种替代方法

我不会存储一个简单的数组,而是存储name结构和bool是否被选中

struct CellData {
   let name: String!
   let isSelected: Bool!
   let index: Int!

   init(name: String, isSelected: Bool, index: Int) {
       self.name = name
       self.isSelected = isSelected
       self.index = index
   }
}

然后在didSelectAtRow函数中,将选择被点击的单元格并使用此信息来准备segue函数

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    self.deselectAll()
    self.cellItems[indexPath.row].isSelected = true
    performSegue(withIdentifier: "TableSegue", sender: nil)
}

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {

    switch (segue.destination.view, segue.destination, sender) {

    case let (_, controller as WebKitController, indexPath as     NSIndexPath):
        if let item = cellItems.first(where: {$0.isSelected == true}) {
            controller.indexPath = item.index
        }
        break
    default:
        break
    }
}

private func deselectAll() {
    for item in cellItems {
        item.isSelected = false
    }
}