更改嵌入式 TabBarController 中的选项卡

Question

我有一个视图控制器，它有两个按钮和一个嵌入式 TabBarController。我想使用两个按钮而不是标签栏项目。并且由于某种原因无法使其工作。

主视图

import UIKit

class ViewController: UIViewController {
    
    var currentTab = 0
    
    @IBOutlet weak var container: UIView!
    
    @IBAction func item1Button(_ sender: UIButton) {
        currentTab = 0
    }
    
    @IBAction func item2Button(_ sender: UIButton) {
        currentTab = 1
    }
    
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.
    }

    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        if segue.identifier == "toControllers"{
            if let vc = segue.destination as? TabsViewController {
                vc.selectedIndex = currentTab

            }
        }
    }
}

TabBarController

import UIKit

class TabsViewController: UITabBarController {
    override func viewDidLoad() {
        super.viewDidLoad()
    }
}

故事板中有两个项目，所以项目 0 和 1 应该没问题。

可能很简单，自己想不通

谢谢！

Answer 1

我弄明白了，这是解决方案：

将主控制器更改为：

class ViewController: UIViewController {
    
    var currentTab = 1
    private var tabViewController: UITabBarController?
    
    @IBOutlet weak var container: UIView!
    
    @IBAction func item1Button(_ sender: UIButton) {
        print("click item1")
        tabViewController?.selectedIndex = 0
    }
    
    @IBAction func item2Button(_ sender: UIButton) {
        print("click item2")
        tabViewController?.selectedIndex = 1
    }
    
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.
    }

    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        if segue.identifier == "toControllers"{
            if let vc = segue.destination as? TabsViewController {
                tabViewController = vc
            }
        }
    }

更改嵌入式 TabBarController 中的选项卡

Change the tabs in a Embedded TabBarController

uitabbarcontroller

uikit

swift