Ios 安全区域的根视图控制器偏移问题

当根视图控制器出现时，视图似乎与安全区域冲突

但当我换了标签，又回到这个标签上时，似乎一切都很好

编辑：

class Switcher {

static func updateRootVC(){
    
    let status = UserDefaults.standard.object(forKey: "Accesstoken")
    let userID = UserDefaults.standard.object(forKey: "UserId")
    let userName = UserDefaults.standard.object(forKey: "UserName")
    let userImage = UserDefaults.standard.object(forKey: "UserImage")

    if let currentUser = userID {
        requestManager.instance.userID = currentUser as! Int
    }
    if let currentStatus = status {
        requestManager.instance.getToken = currentStatus as? String
    }
    if let Name = userName {
        Api.Params.inputUserName = (Name as? String)!
    }
    if let Image = userImage {
        Api.Params.inputUserImage = (Image as? String)!
    }
    
    
    var rootVC : UIViewController?

    if(status != nil){
        rootVC = UIStoryboard(name: "Tabbar", bundle: Bundle.main).instantiateViewController(withIdentifier: "Tabbar") as! UITabBarController
    } else {
        rootVC = UIStoryboard(name: "Main", bundle: Bundle.main).instantiateViewController(withIdentifier: "welcome") as! UINavigationController
    }
    
    rootVC!.view.insetsLayoutMarginsFromSafeArea = true


    let appDelegate = UIApplication.shared.delegate as! AppDelegate
    appDelegate.window?.rootViewController = rootVC
    appDelegate.window?.makeKeyAndVisible()
    
}}

搜索项目的限制条件

用户配置文件与搜索项目具有相同的顶部

选项卡视图控制器设置代码

    func setupTabbar(){
    if Api.Params.isGuest == true {
        let vc1 = storyboardTabbar.instantiateViewController(withIdentifier: "home") as! UINavigationController
        let vc2 = storyboardTabbar.instantiateViewController(withIdentifier: "favorite") as! GuestVC
        let vc3 = storyboardTabbar.instantiateViewController(withIdentifier: "scanner") as! ScannerVC
        let vc4 = storyboardTabbar.instantiateViewController(withIdentifier: "history") as! GuestVC
        let vc5 = storyboardTabbar.instantiateViewController(withIdentifier: "settings") as! GuestVC
        self.viewControllers = [vc1 , vc2 , vc3 , vc4 , vc5]
        self.selectedViewController = vc1

    } else if Api.Params.isLanguageChange == true{
        Api.Params.isLanguageChange = !Api.Params.isLanguageChange
        let vc1 = storyboardTabbar.instantiateViewController(withIdentifier: "home") as! UINavigationController
        let vc2 = storyboardTabbar.instantiateViewController(withIdentifier: "fav") as! UINavigationController
        let vc3 = storyboardTabbar.instantiateViewController(withIdentifier: "scanner") as! ScannerVC
        let vc4 = storyboardTabbar.instantiateViewController(withIdentifier: "his") as! UINavigationController
        let vc5 = storyboardTabbar.instantiateViewController(withIdentifier: "set") as! UINavigationController
        self.viewControllers = [vc1 , vc2 , vc3 , vc4 , vc5]
        self.selectedViewController = vc5
    } else {
        let vc1 = storyboardTabbar.instantiateViewController(withIdentifier: "home") as! UINavigationController
        let vc2 = storyboardTabbar.instantiateViewController(withIdentifier: "fav") as! UINavigationController
        let vc3 = storyboardTabbar.instantiateViewController(withIdentifier: "scanner") as! ScannerVC
        let vc4 = storyboardTabbar.instantiateViewController(withIdentifier: "his") as! UINavigationController
        let vc5 = storyboardTabbar.instantiateViewController(withIdentifier: "set") as! UINavigationController
        self.viewControllers = [vc1 , vc2 , vc3 , vc4 , vc5]
        self.selectedViewController = vc1
    } }

---

尝试使用以下属性从safeArea指定视图插入布局：

rootVC.view.insetsLayoutMarginsFromSafeArea = true

---

尝试使用以下属性从safeArea指定视图插入布局：

rootVC.view.insetsLayoutMarginsFromSafeArea = true

---

设置约束时，请使用SafeArealLayoutGuide

设置约束时，请使用SafeArealLayoutGuide

您可以在Switcher类中尝试此功能，希望对您有所帮助

let appDelegate = UIApplication.shared.delegate as! AppDelegate
let navigationController: UINavigationController?
let storyboard: UIStoryboard?;

if status != nil {

    storyboard = UIStoryboard(name: "Tabs", bundle: nil)

    // HomeTabBarController is a subclass of UITabBarController
    let vc = storyboard?.instantiateViewController(withIdentifier: "HomeTabBarController") as! HomeTabBarController
    navigationController = UINavigationController(rootViewController: vc)
} else {

    storyboard = UIStoryboard(name: "Main", bundle: nil)

    // MainViewController is a subclass of UIViewController
    let vc = storyboard?.instantiateViewController(withIdentifier: "MainViewController") as! MainViewController
    navigationController = UINavigationController(rootViewController: vc)

}

// This hides the navigationBar
navigationController?.navigationBar.isHidden = true

appDelegate.window?.rootViewController = navigationController
appDelegate.window?.makeKeyAndVisible()

---

你可以在你的切换器课上试试这个，我希望它对你有帮助

let appDelegate = UIApplication.shared.delegate as! AppDelegate
let navigationController: UINavigationController?
let storyboard: UIStoryboard?;

if status != nil {

    storyboard = UIStoryboard(name: "Tabs", bundle: nil)

    // HomeTabBarController is a subclass of UITabBarController
    let vc = storyboard?.instantiateViewController(withIdentifier: "HomeTabBarController") as! HomeTabBarController
    navigationController = UINavigationController(rootViewController: vc)
} else {

    storyboard = UIStoryboard(name: "Main", bundle: nil)

    // MainViewController is a subclass of UIViewController
    let vc = storyboard?.instantiateViewController(withIdentifier: "MainViewController") as! MainViewController
    navigationController = UINavigationController(rootViewController: vc)

}

// This hides the navigationBar
navigationController?.navigationBar.isHidden = true

appDelegate.window?.rootViewController = navigationController
appDelegate.window?.makeKeyAndVisible()

---

经过这么多天，终于发现安全区域的顶部约束导致了问题，将其更改为Superview就成功了

---

过了这么多天，终于发现安全区域的顶部约束导致了问题，将其更改为Superview就成功了

---

请先尝试

让appDelegate=UIApplication.shared.delegate作为！AppDelegate

请先尝试

让AppDelegate=UIApplication.shared.delegate作为！AppDelegate仍不工作：（，我已在故事板中标记已选中安全区域布局指南仍不工作：（，我已在Storyboard中选中了标记safeAreaLayoutGuide您可以与我们分享视图上部元素的约束，这些元素位于类别标签上方。我没有在布局约束中看到奇怪的内容，您已经在没有凹口的仿真器或Apple设备中尝试过验证是否存在相同的情况不会发生，例如iPhone 7或8？我可以推荐的另一件事是尝试为元素添加边框，每一个元素都有不同的颜色，这样您就可以直观地识别在执行过程中哪个元素被拉伸，并查看该元素是否有内容。我想这可能是因为我在tabViewControlle中的设置方式r，我正在添加TabViewController的屏幕截图..检查编辑器您可以与我们分享视图上部元素的约束，那些在类别标签上方的元素我看不到布局约束中有什么奇怪的东西，您已经在没有凹口的仿真器或Apple设备中试过验证相同不会发生，例如iPhone 7或8？我可以推荐的另一件事是尝试为元素添加边框，每一个元素都有不同的颜色，这样您就可以直观地识别在执行过程中哪个元素被拉伸，并查看该元素是否有内容。我想这可能是因为我在tabViewCon中的设置方式troller，我正在添加TabViewController的屏幕截图。检查编辑好，很好，很好