ios - 从应用程序委托(delegate)呈现导航 Controller 后，状态栏和导航标题和项目会稍后显示

Question

let check = defaults.bool(forKey: "logged_in")
    if(check){
        let storyBoard = UIStoryboard(name: "Main", bundle: nil)
        let vc = storyBoard.instantiateViewController(withIdentifier: "homevc") a[enter image description here][1]s! UINavigationController
        self.window?.rootViewController = vc
        self.window?.makeKeyAndVisible()
    }

[这里是当 rootviewcontroller 可见时，几秒钟后，状态栏首先神奇地出现，然后导航栏属性出现。

Answer 1

必须在主线程上进行 UI 更改。确保在主线程上调用 window.makeKeyAndVisible() 函数。喜欢:

DispatchQueue.main.async {
   window.makeKeyAndVisible()
}