Swift - Actualiser la barre UITabBarController personnalisée

Question

J'ai une TabBar personnalisée, avec un bouton central en relief, au-dessus de la TabBar. Lorsque l'utilisateur n'a pas terminé une tâche quotidienne, le setupIncompleteMiddleButton () devrait apparaître, indiquant cela. Cependant, une fois que l'utilisateur a terminé la tâche, je voudrais que setupCompleteMiddleButton () apparaisse, indiquant qu'il a terminé la tâche. Je ne sais pas comment faire cela - je ne devrais pas appeler viewDidLoad () dans le contrôleur et lors de son appel, il ne fait rien pour rafraîchir la vue. L'actualisation de la TabBar ne fait rien.

Voici mon contrôleur TabBar:

class TabBarController: UITabBarController, UITabBarControllerDelegate {

required init?(coder aDecoder: NSCoder) {
    super.init(coder: aDecoder)!
}

override func viewDidLoad() {
    super.viewDidLoad()

    // This is where I currently decide which button to show the "complete" one if the task is done, and the incomplete one if not. 
    self.delegate = self
    if UserData.hasCompletedDailyTask() == true {
        setupCompleteMiddleButton()
    } else {
        setupIncompleteMiddleButton()
    }
}

// Incomplete button 
func setupIncompleteMiddleButton() {
    let middleButton = UIButton(frame: CGRect(x: (self.view.bounds.width / 2) - 25, y: -20, width: 50, height: 50))
    
    middleButton.backgroundColor = UIColor.systemYellow
    middleButton.setImage(UIImage(systemName: "sun.max.fill"), for: .normal)
    middleButton.imageView?.tintColor = UIColor.white
    middleButton.layer.cornerRadius = middleButton.frame.width / 2
    middleButton.clipsToBounds = true
    
    self.tabBar.addSubview(middleButton)
    middleButton.addTarget(self, action: #selector(self.middleButtonAction), for: .touchUpInside)
    self.view.layoutIfNeeded()
}

// Complete button
func setupCompleteMiddleButton() {
    let middleButton = UIButton(frame: CGRect(x: (self.view.bounds.width / 2) - 25, y: -20, width: 50, height: 50))

    middleButton.backgroundColor = UIColor.systemGreen
    middleButton.setImage(UIImage(systemName: "checkmark"), for: .normal)
    middleButton.imageView?.tintColor = UIColor.white
    middleButton.layer.cornerRadius = middleButton.frame.width / 2
    middleButton.clipsToBounds = true

    self.tabBar.addSubview(middleButton)
    middleButton.addTarget(self, action: #selector(self.middleButtonAction), for: .touchUpInside)
    self.view.layoutIfNeeded()
}

@objc func middleButtonAction(sender: UIButton) {
    self.selectedIndex = 1  
}
}

Merci!

Answer 1

Vous pouvez essayer ceci pour un seul objet global du bouton et simplement changer l'image chaque fois que la tâche est terminée ou non.

class TabBarController: UITabBarController, UITabBarControllerDelegate {

required init?(coder aDecoder: NSCoder) {
    super.init(coder: aDecoder)!
}

// TabbarController hode this button
var middleButton: UIButton!

override func viewDidLoad() {
    super.viewDidLoad()
    setupButton()
    // This is where I currently decide which button to show the "complete" one if the task is done, and the incomplete one if not.
    self.delegate = self
    // taskCompletion is a call back when UserData finish its task
    if UserData.taskCompletion {
        setupCompleteMiddleButton()
    } else {
    setupIncompleteMiddleButton()
    }
}

func setupButton() {
    middleButton = UIButton(frame: CGRect(x: (self.view.bounds.width / 2) - 25, y: -20, width: 50, height: 50))
    middleButton.backgroundColor = UIColor.systemYellow
    middleButton.layer.cornerRadius = middleButton.frame.width / 2
    middleButton.clipsToBounds = true
    self.tabBar.addSubview(middleButton)
    middleButton.addTarget(self, action: #selector(self.middleButtonAction), for: .touchUpInside)
    self.view.layoutIfNeeded()
}
//  Incomplete button
func setupIncompleteMiddleButton() {
  middleButton.backgroundColor = UIColor.systemYellow
    middleButton.setImage(UIImage(systemName: "sun.max.fill"), for: .normal)
    
}

// Complete button
func setupCompleteMiddleButton() {
    // change button color and image
    middleButton.backgroundColor = UIColor.systemGreen
    middleButton.setImage(UIImage(systemName: "checkmark"), for: .normal)
}

@objc func middleButtonAction(sender: UIButton) {
    self.selectedIndex = 1
}

Answer 2

Peut-être que vous pouvez essayer ceci:

import UIKit

class TabBarController: UITabBarController, UITabBarControllerDelegate {
    
    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)!
    }
    
    // TabbarController hode this button
    var middleButton: UIButton!

    override func viewDidLoad() {
        super.viewDidLoad()
        
        // This is where I currently decide which button to show the "complete" one if the task is done, and the incomplete one if not.
        self.delegate = self
        // taskCompletion is a call back when UserData finish its task
        if UserData.taskCompletion {
            setupCompleteMiddleButton()
        }
        setupIncompleteMiddleButton()
    }
    
    //  Incomplete button 
    func setupIncompleteMiddleButton() {
        // initialize button  
        middleButton = UIButton(frame: CGRect(x: (self.view.bounds.width / 2) - 25, y: -20, width: 50, height: 50))

        middleButton.backgroundColor = UIColor.systemYellow
        middleButton.setImage(UIImage(systemName: "sun.max.fill"), for: .normal)
        middleButton.imageView?.tintColor = UIColor.white
        middleButton.layer.cornerRadius = middleButton.frame.width / 2
        middleButton.clipsToBounds = true
        self.tabBar.addSubview(middleButton)
        middleButton.addTarget(self, action: #selector(self.middleButtonAction), for: .touchUpInside)
        self.view.layoutIfNeeded()
    }
    
    // Complete button
    func setupCompleteMiddleButton() {
        // change button color and image
        middleButton.backgroundColor = UIColor.systemGreen
        middleButton.setImage(UIImage(systemName: "checkmark"), for: .normal)
    }
    
    @objc func middleButtonAction(sender: UIButton) {
        self.selectedIndex = 1
    }
}