我正在快速学习，并且在尝试在触摸 TableViewCell 时触发 segue 时遇到问题，这应该将 url 传递给第二个 View ，目前只是在标签中显示它。 我动态创建(我见过人们以编程方式使用，这可能是正确的词)每个单元格，所以，在 Storyboard 中，除了 View 本身之外，我没有任何对象可以链接到另一个 View ......这就是我做到了。 所以我将第一个 View Controller 连接到第二个 View Controller ，并添加了执行转场的代码。

我不确定这是否正确，我的知识来自教程，但并未完全解释我想做什么。

下面是两个 View 的代码。

第一眼

    import UIKit

protocol sendInfoDelegate{

    func userDidEnterInfo( WhichInfo info : String)

}

class ViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {

var tableData = []
@IBOutlet weak var redditListTableView: UITableView!
var selectedCellURL : String?
var delegate : sendInfoDelegate? = nil



override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.

    // change the link to change the json source

    getRedditJSON("http://www.reddit.com/.json")
}

//
//Creates a connection via a task (networktask) then parses the json
//
func getRedditJSON(whichReddit : String){
    let mySession = NSURLSession.sharedSession()
    let url: NSURL = NSURL(string: whichReddit)
    let networkTask = mySession.dataTaskWithURL(url, completionHandler : {data, response, error -> Void in
        var err: NSError?
        var theJSON = NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions.MutableContainers, error: &err) as NSMutableDictionary
        let results : NSArray = theJSON["data"]!["children"] as NSArray
        dispatch_async(dispatch_get_main_queue(), {
            self.tableData = results
            self.redditListTableView.reloadData()
        })
    })
    networkTask.resume()
}

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

//needs to be implemented

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

//creates the whole table

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
    let cell: UITableViewCell = UITableViewCell(style: UITableViewCellStyle.Subtitle, reuseIdentifier: "MyTestCell")
    let redditEntry : NSMutableDictionary = self.tableData[indexPath.row] as NSMutableDictionary
    cell.textLabel?.text = redditEntry["data"]!["title"] as? String
    cell.detailTextLabel?.text = redditEntry["data"]!["author"] as? String
    return cell
}

// action to be taken when a cell is selected
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
    let redditEntry : NSMutableDictionary = self.tableData[indexPath.row] as NSMutableDictionary
    self.selectedCellURL = redditEntry["data"]!["url"] as? String
    self.performSegueWithIdentifier("passInfo" , sender: indexPath)
    println(self.selectedCellURL!)

    if delegate != nil {
        let information:String = self.selectedCellURL!
        println("ciao")
        delegate?.userDidEnterInfo(WhichInfo: information)
        self.navigationController?.popViewControllerAnimated(true)

    }

第二个观点

import UIKit




class WebPageController : UIViewController, sendInfoDelegate {


    var infoFromSVC: String?

    @IBOutlet weak var labelVC: UILabel!


    func userDidEnterInfo(WhichInfo info: String) {
        self.infoFromSVC = info
        labelVC.text = infoFromSVC

    }

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
    }

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

    override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
        if segue.identifier == "passInfo"{
            let firstVController : ViewController = segue.destinationViewController as ViewController
            firstVController.delegate = self

        }
    }
}

谢谢。

最佳答案

要将任何数据传递给第二个 View Controller ，您需要在第一个 View Controller 中实现 prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) 方法，并在此处将任何数据传递给第二个 View Controller segue.destinationViewController 对象。

例如

// this method must be in first view controller
 override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
        if segue.identifier == "passInfo" {
            var secondViewController : SecondViewController = segue.destinationViewController as SecondViewController

            var indexPath = self.tableview.indexPathForSelectedRow() //get index of data for selected row      

           secondViewController.data = self.dataArray.objectAtIndex(indexPath.row) // get data by index and pass it to second view controller

        }
    }

在第二个 View Controller 中获取数据的代码

override func viewDidLoad() {
    super.viewDidLoad()

    self.label.text = self.data
}

数据变量必须定义为第二个 View Controller 的属性。

关于ios - Swift - 在动态 TableCell 上继续，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/26303616/