为啥当代码从 Alamofire 响应中触发时 KYDrawerController 不显示？

Posted 2023-02-24

【中文标题】为啥当代码从 Alamofire 响应中触发时 KYDrawerController 不显示？

【英文标题】：Why KYDrawerController do not show when code fired from Alamofire response?为什么当代码从 Alamofire 响应中触发时 KYDrawerController 不显示？

【发布时间】：2019-03-07 16:38:12

【问题描述】：

我正在使用 KYDrawerController 在登录成功时在主屏幕上显示侧边菜单。

我使用 Alamofire 请求用户的身份验证，当响应成功时，然后用抽屉打开主屏幕。

问题是主屏幕不显示或登录屏幕保持静止，但是当从 Alamofire 响应之外调用代码时，它工作得很好。 这是我的代码

Alamofire.request(URL_LOGIN_PHONE, method: .post, parameters: parameters).responseJSON   response in

        switch response.result 
        case .success(let value):
            let jsonResponse = JSON(value)

            // Check if status = success
            if jsonResponse["status"] == "success" 

        // Init Drawer
        let appDelegate = UIApplication.shared.delegate as! AppDelegate

        let storyBoard = UIStoryboard.init(name: "Main", bundle: Bundle.main)

        let navVC = storyBoard.instantiateViewController(withIdentifier: "NavVC")  // is the main controller for the drawer.
        let drawerVC = storyBoard.instantiateViewController(withIdentifier: "DrawerVC")  // is the drawer, and the drawer needs a main controller

        appDelegate.drawerController.mainViewController = navVC
        appDelegate.drawerController.drawerViewController = drawerVC

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

             else 

            

        case .failure( _):
        

    

【参考方案1】：

你必须把代码放在异步闭包块中，像这样

DispatchQueue.main.async 
 // Init Drawer
    let appDelegate = UIApplication.shared.delegate as! AppDelegate

    let storyBoard = UIStoryboard.init(name: "Main", bundle: Bundle.main)

    let navVC = storyBoard.instantiateViewController(withIdentifier: "NavVC")  // is the main controller for the drawer.
    let drawerVC = storyBoard.instantiateViewController(withIdentifier: "DrawerVC")  // is the drawer, and the drawer needs a main controller

    appDelegate.drawerController.mainViewController = navVC
    appDelegate.drawerController.drawerViewController = drawerVC

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

【讨论】：

有没有办法知道抽屉是否打开了？

在 rootViewController 行之前添加 self.window = UIWindow(frame: UIScreen.main.bounds)

窗口和drawerController在AppDelegate中声明。

对不起，我的意思是这一行appDelegate.window = UIWindow(frame: UIScreen.main.bounds) 在 rootViewController 行上方

感谢您的宝贵时间，但我找到了解决方案。

【参考方案2】：

问题与 Alamofire 或主线程无关，只是代码试图实例化已加载的抽屉。所以我添加了代码来检查它是否加载。如果已经加载，我使用 unwindSegue 返回主视图控制器。

let appDelegate = UIApplication.shared.delegate as! AppDelegate
        // check if drawer loaded or not.
        if appDelegate.drawerController.isViewLoaded 
            // Drawer loaded prevoiusly, dont load it again
            appDelegate.drawerController.setDrawerState(.closed, animated: true)
            self.exitToRestaurants()
         else 
            // Drawer not loaded from prevouis use.
            // and it will be loaded for the first time/
            let storyBoard = UIStoryboard.init(name: "Main", bundle: Bundle.main)

            let navVC = storyBoard.instantiateViewController(withIdentifier: "NavVC")  // is the main controller for the drawer.
            let drawerVC = storyBoard.instantiateViewController(withIdentifier: "DrawerVC")  // is the drawer, and the drawer needs a main controller


            appDelegate.drawerController.mainViewController = navVC
            appDelegate.drawerController.drawerViewController = drawerVC

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