安全区域的根视图控制器偏移问题

Question

当根视图控制器出现时，视图似乎与安全区域冲突

但是当我切换标签并再次回到这个标签时，似乎一切正常

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()
    
}}

搜索项的限制条件

用户个人资料与搜索项的排名相同。

TabViewController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
    } }

Answer 1

尝试使用 insetsLayoutMarginsFromSafeArea 属性:

从 safeArea 指定视图插入布局

rootVC.view.insetsLayoutMarginsFromSafeArea = true

Answer 2

设置约束时，请使用 safeAreaLayoutGuide

Answer 3

您可以在您的 Switcher 中尝试此操作 class，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()

Answer 4

经过这么多天，终于发现是 safeArea 的顶级约束导致了问题，将其更改为 Superview 就成功了

安全区域的根视图控制器偏移问题

Root view controller offset issue from Safe Area

ios

swift

xcode

rootviewcontroller