查看标签栏 controller 从 storyboard swift 5

Question

我正在研究 swift 5 和 xcode 11.5

我正在尝试将用户从主 storyboard 移动到标签栏 controller 如果他已登录，

在我的 appDelegate 我试过这个

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {

    if let api_token = helper.getApiToken() {
        print("api_token: \(api_token)")

        let tab = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(identifier: "maintab")
        window?.rootViewController = tab
    }
    return true
}

在这里我想检查是否有用户 api_token，如果是，则移动到标签栏，如果没有，则显示主 storyboard 但它总是转到 main.storyboard，即使有令牌！

Answer 1

试试这个代码

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {

    if let api_token = helper.getApiToken() {
        print("api_token: \(api_token)")

        let storyboard = UIStoryboard(name: "Main", bundle: nil)
        let tab = storyboard.instantiateViewController(withIdentifier: "maintab")
        window?.rootViewController = tab
    }

    return true
}