CODEWITHSUNDEEP
swift
whitebear
whitebear

Reputation: 12433

UIPickerView on Swift 3

I have error with using UIPickerView

SelectViewController.swift:35:10: Method 'pickerView(pickerView:numberOfRowsInComponent:)' has different argument names from those required by protocol 'UIPickerViewDataSource' ('pickerView(_:numberOfRowsInComponent:)')

I set UIPickerView on Storyboard and attached this to the songPicker variable.

and then I think I integrated the functions necessary though, it showed error like this.

I found out that structure of picker view is changed on the version of swift.

However can't find the correct answer yet.

My swift is 3.1

Does anyone help me?

class SelectViewController: UIViewController, UIPickerViewDataSource, UIPickerViewDelegate{

    @IBOutlet weak var songPicker: UIPickerView!

    let songNames = ["test","test2"]

    override func viewDidLoad(){
            songPicker.delegate = self
          songPicker.dataSource = self

    }
    func numberOfComponents(in pickerView: UIPickerView) -> Int {
        return 1
    }


    func pickerView(pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
        return songNames.count
    }
    func pickerView(pickerView: UIPickerView, titleForRow row: Int) -> String? {
        return songNames[row]
    }
    override func didReceiveMemoryWarning() {

    }
}

Upvotes: 2

Views: 1042

Answers (4)

Ved Rauniyar
Ved Rauniyar

Reputation: 1589

I recommend you to use IQDropDownTextField - Click Here

Upvotes: 0

Amul4608
Amul4608

Reputation: 1448

try this code

class ElibraryViewController: UIViewController, UIPickerViewDelegate,UIPickerViewDataSource {

@IBOutlet weak var txtTitle: UITextField!
 @IBOutlet weak var Picker: UIPickerView!
let songNames = ["test","test2"]

override func viewDidLoad()
    {

        super.viewDidLoad()


            }

    func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String?
    {


            return songNames[row]
    }

    func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int)
    {



        let obj = songNames[row]
        txtTitle.text = obj



    }

    func numberOfComponents(in pickerView: UIPickerView) -> Int {

        return 1
    }

    func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int
    {



        return songNames.count



    }
override func didReceiveMemoryWarning() {

    }
}

Upvotes: 2

pkc
pkc

Reputation: 8504

UIPickerViewDataSource is changes in swift 3 and above.

Updated syntax:-

func numberOfComponents(in pickerView: UIPickerView) -> Int {
    return 1
}

func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
    return arrayData.count
}

func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
    return arrayData[row]
}

func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {

}

Have a look at apple documentation (SO reference).

Upvotes: 1

Mehul Thakkar
Mehul Thakkar

Reputation: 12594

Use this method, see the use of _ before pickerview. That is the only problem

    func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {

    }

Upvotes: 1

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