Question

我在运行App后无法传递数据。在选择表格视图单元格后，我几乎试图从前一个视图控制器更改标签任何人都可以帮我解决错误吗？

查看控制器

class AircraftSearch: UIViewController ,SendbackDelegate{

    @IBOutlet weak var Mabda: UIButton!
    @IBOutlet weak var maghsad: UIButton!
    @IBOutlet weak var labelcity: UILabel!


    var Airurl = NSURL()
    var ScrOrDstArray = [MabdaAndMaghsad]()
    var origin = [String]() // save mabda
    var purpose = [String]() // save maghsad
    var sendDataToTableview = [String]()




    override func viewDidLoad() {
        super.viewDidLoad()
        GetPassCity()

    }

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

    @IBAction func selectMabda(sender: AnyObject) {
        sendDataToTableview = origin
        performSegueWithIdentifier("SelectedCellSegue", sender: sender)


    }

    @IBAction func selectMaghsad(sender: AnyObject) {
        sendDataToTableview = purpose
        print(sendDataToTableview)
        performSegueWithIdentifier("SelectedCellSegue", sender: sender)

    }


    func originAndpurpose() {
        let dataCity = ScrOrDstArray
        for i in dataCity{

            if i.SrcOrDst == true{
                origin.append(i.Name)
            }else{
                purpose.append(i.Name)
            }
        }
    }



    func GetPassCity(){
        let actInd : UIActivityIndicatorView        = UIActivityIndicatorView(frame: CGRectMake(0,0, 50, 50)) as UIActivityIndicatorView
        actInd.center                           = self.view.center
        actInd.hidesWhenStopped                 = true
        actInd.activityIndicatorViewStyle       = UIActivityIndicatorViewStyle.Gray
        view.addSubview(actInd)
        actInd.startAnimating()

        NSURLSession.sharedSession().dataTaskWithURL(Airurl){ ( data ,response ,error) in
            if error != nil{
                print("A")
                print(error!)
            }else{

                do{
                    //readin data from Server
                    let posts   = try NSJSONSerialization.JSONObjectWithData(data!, options: NSJSONReadingOptions.MutableContainers) as! [[String:AnyObject]]
                    //save data
                    for post in posts{
                        var postCity:MabdaAndMaghsad?
                        if  let  Id         = post["Id"]        as? Int     ,
                            let nameCity    = post["Name"]      as? String  ,
                            let SrcOrDst    = post["SrcOrDst"]  as? Bool
                        {
                            postCity    = MabdaAndMaghsad(ID: Id, Name: nameCity, SrcOrDst: SrcOrDst)
                        }
                        self.ScrOrDstArray.append(postCity!)

                    }

                    //===============

                    dispatch_async(dispatch_get_main_queue()){
                        actInd.stopAnimating()
                        self.originAndpurpose()
                       print(self.origin)
                        print("=======")
                     //   print(self.purpose)
                    }

                }catch let error as NSError{

                    print("B")
                    print(error)
                }
            }


            }.resume()

    }


    func sendNameToPreviousVC(SelectCity: String) {
        labelcity.text = SelectCity

    }


    override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
        if segue.identifier == "SelectedCellSegue" {
            if let VC = segue.destinationViewController as? SelectedCity {

                VC.toTake = sendDataToTableview
                VC.delegate = self
            }
        }

    }

}

和tableview控制器导入UIKit 协议SendbackDelegate：class { func sendNameToPreviousVC（城市：String） }

class SelectedCity: UITableViewController {
    var toTake = [String]()
    var selecteCity = String()
    weak var delegate: SendbackDelegate? = nil

    override func viewDidLoad() {
        super.viewDidLoad()


    }

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

    // MARK: - Table view data source


    override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
        // #warning Incomplete implementation, return the number of sections
        return 1
    }

    override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        // #warning Incomplete implementation, return the number of rows
        return toTake.count ?? 0

    }

    override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCellWithIdentifier("stcell", forIndexPath: indexPath) as? mAndMCell

        let nameCity = toTake[indexPath.row]
        print(nameCity)

        cell!.nameCityLabel.text = nameCity
        return cell!
    }

    override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath){

        let indexPath = tableView.indexPathForSelectedRow!
        let currentCell = tableView.cellForRowAtIndexPath(indexPath) as! mAndMCell!

        selecteCity = currentCell.nameCityLabel!.text as String!

        sendBackIdCity(selecteCity)
        navigationController?.popViewControllerAnimated(true)



    }
    func sendBackIdCity(name: String){
        self.delegate?.sendNameToPreviousVC(name)

    }

    override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
        if segue.identifier == "backCitySegue"{
            var VCOne = segue.destinationViewController as? AircraftSearch
                VCOne.delegate = self


        }
    }



}

错误是第VCOne.delegate = self行

错误= Value of type 'AircraftSearch?' has no member 'delegate'

Answer 1

该行应该是

self.delegate = VCOne

因为self是具有SelectedCity属性的delegate，而VCOne属于AircraftSearch类型，因此是 a SendbackDelegate！

在swift 2中委派错误

1 个答案: