swift:UITabBarに設定したViewControllerにコードで画面遷移したい

iOS開発の初心者です。
【UIKit】UITabBarの使い方
こちらのブログの方法を丸写しで、Storyboardを使わないでUITabBarで画面遷移できるようにしました。
他のViewControllerでボタンを押すと、UITabBarに設定したViewControllerに画面遷移したいのですが、方法がわかりません。

Storyboard を使わずコードだけで画面を生成、遷移をしてみる
こちらの方法を真似しようとしましたが、動かすことができませんでした。

どうか教えていただけないでしょうか。
よろしくお願いします。

環境：
Xcode,9.2
Swidt 4

Swift4
1AppDelegate.swift
2
3import UIKit
4
5@UIApplicationMain
6class AppDelegate: UIResponder, UIApplicationDelegate {
7
8    var window: UIWindow?
9
10
11    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool
12    {
13        
14        //ViewControllerのインスタンスを生成。
15        let tab1 = OneViewController()
16        let tab2 = TwoViewController()
17        
18        
19        
20        
21        //タブを配列に代入
22        let myTabs = NSArray(objects:tab1,tab2)
23        
24        //UITabControlerのインスタンスを生成
25        let tabbarController = UITabBarController()
26        
27        //tabbarControllerにタブを設定する
28        tabbarController.setViewControllers(myTabs as? [UIViewController], animated: false)
29        
30        //rootにtabbarControllerを設定
31        self.window!.rootViewController = tabbarController
32        
33        //表示
34        self.window!.makeKeyAndVisible()
35        
36        // Override point for customization after application launch.
37        return true
38    }
39
40    func applicationWillResignActive(_ application: UIApplication) {
41        // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
42        // Use this method to pause ongoing tasks, disable timers, and invalidate graphics rendering callbacks. Games should use this method to pause the game.
43    }
44
45    func applicationDidEnterBackground(_ application: UIApplication) {
46        // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
47        // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
48    }
49
50    func applicationWillEnterForeground(_ application: UIApplication) {
51        // Called as part of the transition from the background to the active state; here you can undo many of the changes made on entering the background.
52    }
53
54    func applicationDidBecomeActive(_ application: UIApplication) {
55        // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
56    }
57
58    func applicationWillTerminate(_ application: UIApplication) {
59        // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
60    }
61
62
63}

Swift4
1OneViewController.swift
2
3import UIKit
4
5class OneViewController: UIViewController
6{
7    init()
8    {
9        super.init(nibName: nil, bundle: nil)
10        //背景色の設定
11        self.view.backgroundColor = UIColor.blue
12        
13        //システムアイコンの設定
14        let systemIcon = UITabBarItem(tabBarSystemItem: .bookmarks , tag: 1)
15        
16        //タブのアイコンの設定
17        self.tabBarItem = systemIcon
18    }
19    
20    required init?(coder aDecoder: NSCoder)
21    {
22        super.init(coder: aDecoder)
23    }
24    
25    
26    override func viewDidLoad() {
27        super.viewDidLoad()
28
29　　　　// ボタンを追加
30        var jumpButton : UIButton!
31        
32        jumpButton = UIButton(frame: CGRect(x: (self.view.frame.size.width) / 2, y: (self.view.frame.size.height) / 2, width: (self.view.frame.size.width) / 4 , height: (self.view.frame.size.height) / 4 ))
33        jumpButton.setTitle("Text", for: .normal)
34        
35        jumpButton.addTarget(self, action: #selector(jumpView), for: .touchUpInside)
36        // Do any additional setup after loading the view.
37    }
38
39    override func didReceiveMemoryWarning() {
40        super.didReceiveMemoryWarning()
41        // Dispose of any resources that can be recreated.
42    }
43    
44　　// ボタンが押された時の動作
45    @objc func jumpView(sender: UIButton)
46    {
47        print ("ボタンが押されました")
48        // ここでTwoViewControllerに画面遷移したい
49
50        let nextVC = TwoViewController()
51        let naviVC = UINavigationController(rootViewController: nextVC)
52        self.present(naviVC, animated: true, completion: nil)
53        // これだとTabBarが隠れてしまう
54    }
55
56
57    /*
58    // MARK: - Navigation
59
60    // In a storyboard-based application, you will often want to do a little preparation before navigation
61    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
62        // Get the new view controller using segue.destinationViewController.
63        // Pass the selected object to the new view controller.
64    }
65    */
66
67}
68

Swift4
1
2import UIKit
3
4class TwoViewController: UIViewController
5{
6    init()
7    {
8        super.init(nibName: nil, bundle: nil)
9        //背景色の設定
10        self.view.backgroundColor = UIColor.white
11        
12        //システムアイコンの設定
13        let systemIcon = UITabBarItem(tabBarSystemItem: .favorites, tag: 2)
14        
15        
16        //タブのアイコンの設定
17        self.tabBarItem = systemIcon
18    }
19    
20    required init?(coder aDecoder: NSCoder)
21    {
22        super.init(coder: aDecoder)
23    }
24    
25    
26    override func viewDidLoad() {
27        super.viewDidLoad()
28
29        // Do any additional setup after loading the view.
30    }
31
32    override func didReceiveMemoryWarning() {
33        super.didReceiveMemoryWarning()
34        // Dispose of any resources that can be recreated.
35    }
36    
37
38    /*
39    // MARK: - Navigation
40
41    // In a storyboard-based application, you will often want to do a little preparation before navigation
42    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
43        // Get the new view controller using segue.destinationViewController.
44        // Pass the selected object to the new view controller.
45    }
46    */
47
48}
49

行動規範の内容に同意します

回答2件

ベストアンサー

ごめんなさい。私が質問の勘違いをしていました。
例えば以下のような形でいかがでしょうか？

AppDelegate.swift
1    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool
2    {
3        
4        //ViewControllerのインスタンスを生成。
5        let tab1 = OneViewController()
6        let nv1 = UINavigationController(rootViewController: tab1)
7        let tab2 = TwoViewController()
8        let nv2 = UINavigationController(rootViewController: tab2)
9        
10        //タブを配列に代入
11        let myTabs = NSArray(objects:nv1,nv2)
12        
13        //UITabControlerのインスタンスを生成
14        let tabbarController = UITabBarController()
15        
16        //tabbarControllerにタブを設定する
17        tabbarController.setViewControllers(myTabs as? [UIViewController], animated: false)
18        
19        //rootにtabbarControllerを設定
20        self.window!.rootViewController = tabbarController
21        
22        //表示
23        self.window!.makeKeyAndVisible()
24        
25        // Override point for customization after application launch.
26        return true
27    }
28

OneViewController.swift
1import UIKit
2
3class OneViewController: UIViewController
4{
5    private lazy var button: UIButton = {
6    
7        let button = UIButton(type: .system)
8        button.translatesAutoresizingMaskIntoConstraints = false
9        button.setTitle("push", for: .normal)
10        button.tintColor = UIColor.white
11        button.backgroundColor = UIColor.red
12        button.addTarget(self, action: #selector(onTappedPush(_:)), for: .touchUpInside)
13        button.widthAnchor.constraint(equalToConstant: 200).isActive = true
14        button.heightAnchor.constraint(equalToConstant: 40).isActive = true
15        return button
16    }()
17    
18    init()
19    {
20        super.init(nibName: nil, bundle: nil)
21        //背景色の設定
22        self.view.backgroundColor = UIColor.blue
23        
24        //システムアイコンの設定
25        let systemIcon = UITabBarItem(tabBarSystemItem: .bookmarks , tag: 1)
26        
27        //タブのアイコンの設定
28        self.tabBarItem = systemIcon
29        
30        
31    }
32    
33    required init?(coder aDecoder: NSCoder)
34    {
35        fatalError("init(coder:) has not been implemented")
36    }
37    
38    
39    override func viewDidLoad() {
40        
41        super.viewDidLoad()
42
43        navigationItem.title = "Nav1"
44        
45
46        self.view.addSubview(button)
47
48        button.translatesAutoresizingMaskIntoConstraints = false
49        button.widthAnchor.constraint(equalToConstant: 200).isActive = true
50        button.heightAnchor.constraint(equalToConstant: 40).isActive = true
51        button.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true
52        button.centerYAnchor.constraint(equalTo: view.centerYAnchor).isActive = true
53    }
54    
55    override func didReceiveMemoryWarning() {
56        super.didReceiveMemoryWarning()
57        // Dispose of any resources that can be recreated.
58    }
59    
60   @objc func onTappedPush(_ sender: UIButton) {
61        let vc = TwoViewController()
62        navigationController?.pushViewController(vc, animated: true)
63    }
64
65}

TwoViewController.swift
1import UIKit
2
3class TwoViewController: UIViewController
4{
5    init()
6    {
7        super.init(nibName: nil, bundle: nil)
8        
9　　　　　//背景色の設定
10        self.view.backgroundColor = UIColor.white
11        
12        //システムアイコンの設定
13        let systemIcon = UITabBarItem(tabBarSystemItem: .favorites, tag: 2)
14        
15        
16        //タブのアイコンの設定
17        self.tabBarItem = systemIcon
18    }
19    
20    required init?(coder aDecoder: NSCoder)
21    {
22        super.init(coder: aDecoder)
23    }
24    
25    
26    override func viewDidLoad() {
27        super.viewDidLoad()
28        
29        navigationItem.title = "Nav2"
30
31        // Do any additional setup after loading the view.
32    }
33    
34    override func didReceiveMemoryWarning() {
35        super.didReceiveMemoryWarning()
36        // Dispose of any resources that can be recreated.
37    }
38}
39

投稿2018/03/09 23:31

newmt

総合スコア1277

退会済みユーザー

2018/03/10 01:19

newmtさん、ありがとうございます。思っていた画面遷移ができるようになりました。数日悩んでいた問題が一気に解決して、ホッとしています。本当にありがとうございました。

行動規範の内容に同意します

これでいかがでしょうか？

Swift
1
2//tabbarControllerにタブを設定する
3tabbarController.setViewControllers(myTabs as? [UIViewController], animated: false)
4↓
5tabbarController.setViewControllers([tab1, tab2], animated: false)

投稿2018/03/09 22:57

newmt

総合スコア1277

退会済みユーザー

2018/03/09 23:22

newmtさん、すいませんでした。コードと文章が足りませんでした。 OneViewControllerに作成したボタンが押されると、TwoViewControllerに画面遷移したいのですが、 let nextVC = TwoViewController() let naviVC = UINavigationController(rootViewController: nextVC) self.present(naviVC, animated: true, completion: nil) で画面遷移するとTabBarが次の画面の下に隠れてしまうのです。その質問だったのですが、文章とコードが足りませんでした。すいません。