Discussion :

[cloeuf]

Bonjour à tous,

swift 4.2 - macOS

j'ai un problème pour récupérer une valeur depuis un popover...

j'ai un tableview avec dans une cellule un textfield et un button
quand j'appuie sur le button cela ouvre un popover dans lequel je choisi une valeur qui devrait remplir le textfield

l'ouverture du popover marche bien... mais je perd le focus sur la ligne choisie

des idées....

merci

[benjisan]

Hello Cloeuf,

Tu dois utiliser les protocols et les délégations.
En gros, dans ton popoverController (second controller), tu crées un protocol qui va retourner la valeur sélectionnée à ton premier controller (TableView).

Voici un exemple :

• ViewController (mon premier controller, chez toi c'est ta TableView)

Code :

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import UIKit
 
class ViewController: UIViewController {
 
    let openPopover: UIButton = {
        let button = UIButton()
        button.translatesAutoresizingMaskIntoConstraints = false
        button.setTitle("Open Popover", for: .normal)
        button.setTitleColor(.lightGray, for: .normal)
        button.layer.borderColor = UIColor.lightGray.cgColor
        button.layer.borderWidth = 1
        button.layer.cornerRadius = 10
        button.addTarget(self, action: #selector(openPopover(_:)), for: .touchUpInside)
        return button
    }()
 
    let resultLabel: UILabel = {
        let label = UILabel()
        label.translatesAutoresizingMaskIntoConstraints = false
        label.text = "Résultat :"
        label.textColor = .lightGray
        label.textAlignment = .left
        return label
    }()
 
    let resultTextfield: UITextField = {
        let t = UITextField()
        t.translatesAutoresizingMaskIntoConstraints = false
        t.layer.cornerRadius = 10
        t.layer.borderColor = UIColor.lightGray.cgColor
        t.layer.borderWidth = 1
        t.textAlignment = .center
        t.textColor = .lightGray
        return t
    }()
 
    override func viewDidLoad() {
        super.viewDidLoad()
 
        self.view.backgroundColor = .white
        self.title = "Développez.com"
 
        self.view.addSubview(openPopover)
 
        self.view.addSubview(resultLabel)
 
        self.view.addSubview(resultTextfield)
 
        setupView(UIScreen.main.bounds.size)
    }
 
    func setupView(_ size: CGSize) {
 
        resultLabel.topAnchor.constraint(equalTo: view.topAnchor, constant: 130).isActive = true
        resultLabel.leftAnchor.constraint(equalTo: view.leftAnchor, constant: 20).isActive = true
        resultLabel.widthAnchor.constraint(equalToConstant: 80).isActive = true
 
        resultTextfield.topAnchor.constraint(equalTo: view.topAnchor, constant: 130).isActive = true
        resultTextfield.leftAnchor.constraint(equalTo: resultLabel.rightAnchor, constant: 5).isActive = true
        resultTextfield.rightAnchor.constraint(equalTo: view.rightAnchor, constant: -20).isActive = true
 
        openPopover.topAnchor.constraint(equalTo: resultLabel.bottomAnchor, constant: 50).isActive = true
        openPopover.leftAnchor.constraint(equalTo: view.leftAnchor, constant: 50).isActive = true
        openPopover.rightAnchor.constraint(equalTo: view.rightAnchor, constant: -50).isActive = true
    }
 
    @objc func openPopover(_ sender: UIButton) {
        let vc = PopoverController()
        vc.preferredContentSize = CGSize(width: 400,height: 300)
        vc.modalPresentationStyle = .popover
 
        vc.delegate = self
 
        if let pres = vc.presentationController {
            pres.delegate = self
        }
        self.present(vc, animated: true)
        if let pop = vc.popoverPresentationController {
            pop.sourceView = (sender as UIView)
            pop.sourceRect = (sender as UIView).bounds
        }
    }
 
}
 
extension ViewController: ReturnDelegate {
 
    func DoSomething(text: String) {
        resultTextfield.text = "\(text)"
    }
 
}
 
extension ViewController: UIPopoverPresentationControllerDelegate {
 
    func adaptivePresentationStyle(for controller: UIPresentationController) -> UIModalPresentationStyle {
        return .none
    }
 
}

• PopoverController

Code :

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import UIKit
 
protocol ReturnDelegate {
    func DoSomething(text: String)
}
 
class PopoverController: UIViewController {
 
    let picker: UIPickerView = {
        let p = UIPickerView()
        p.translatesAutoresizingMaskIntoConstraints = false
        p.backgroundColor = .lightGray
        return p
    }()
 
    let buttonOK: UIButton = {
        let button = UIButton()
        button.translatesAutoresizingMaskIntoConstraints = false
        button.setTitle("OK", for: .normal)
        button.setTitleColor(.white, for: .normal)
        button.layer.borderWidth = 1
        button.layer.borderColor = UIColor.white.cgColor
        button.layer.cornerRadius = 10
        button.addTarget(self, action: #selector(okPressed(_:)), for: .touchUpInside)
        return button
    }()
 
    var delegate: ReturnDelegate!
    var returnValue: String?
    let dataArray = ["Test 1", "Test 2", "Test 3"]
 
    override func viewDidLoad() {
        super.viewDidLoad()
 
        self.view.backgroundColor = .lightGray
 
        picker.delegate = self
        picker.dataSource = self
        self.view.addSubview(picker)
 
        self.view.addSubview(buttonOK)
 
        setupView(UIScreen.main.bounds.size)
    }
 
    func setupView(_ size: CGSize) {
        picker.topAnchor.constraint(equalTo: view.topAnchor).isActive = true
        picker.leftAnchor.constraint(equalTo: view.leftAnchor).isActive = true
        picker.rightAnchor.constraint(equalTo: view.rightAnchor).isActive = true
 
        buttonOK.topAnchor.constraint(equalTo: picker.bottomAnchor, constant: 20).isActive = true
        buttonOK.leftAnchor.constraint(equalTo: view.leftAnchor, constant: 50).isActive = true
        buttonOK.rightAnchor.constraint(equalTo: view.rightAnchor, constant: -50).isActive = true
 
    }
 
    @objc func okPressed(_ sender: UIButton) {
        if let val = returnValue {
            delegate.DoSomething(text: val)
            self.dismiss(animated: true, completion: nil)
        }
    }
 
}
 
extension PopoverController: UIPickerViewDelegate, UIPickerViewDataSource {
 
    func numberOfComponents(in pickerView: UIPickerView) -> Int {
        return 1
    }
 
    func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
        return dataArray.count
    }
 
    func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
        return dataArray[row]
    }
 
    func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
        returnValue = dataArray[row]
 
    }
 
}

• Resultat en image :

Bien à toi

Benjamin

[cloeuf]

Merci... pour ta réponse...