显示加载屏幕时如何处理身份验证？

debugcn 发表于 Dev

利索夫斯基

如何同时显示加载屏幕和处理授权？

我可以切换到LoadingView并返回到AuthViewinAuthController还是需要将身份验证逻辑移到LoadingController？

class AuthController : Controller() {
    val authView : AuthView by inject()
    val loadingView : LoadingView by inject()

    fun tryAuth(login: String, password: String) {
        runAsync {
            login == "admin" && password == "admin"
        } ui { successful ->
            authView.replaceWith(loadingView, ViewTransition.Fade(0.5.seconds))

            if (successful) {
                // doesn't work
                loadingView.replaceWith(MainView::class, ViewTransition.Metro(0.5.seconds))
            } else {
                // doesn't work
                loadingView.replaceWith(AuthView::class, ViewTransition.Fade(0.5.seconds))
            }
        }
    }
}

埃德文·赛斯

要更换AuthView用LoadingView，然后LoadingView与MainView在相同的脉冲，所以这不会给你想要的东西。通常，您希望LoadingView在评估身份验证信息之前更改为UI 线程上的。使用这种方法，您的代码可以工作，但它可能不是您想要的。

class AuthController : Controller() {
    val authView : AuthView by inject()
    val loadingView : LoadingView by inject()

    fun tryAuth(login: String, password: String) {
        authView.replaceWith(loadingView, ViewTransition.Fade(0.5.seconds))

        runAsync {
            // Simulate db access or http call
            Thread.sleep(2000)
            login == "admin" && password == "admin"
        } ui { successful ->

            if (successful) {
                // doesn't work
                loadingView.replaceWith(MainView::class, ViewTransition.Metro(0.5.seconds))
            } else {
                // doesn't work
                loadingView.replaceWith(AuthView::class, ViewTransition.Fade(0.5.seconds))
            }

        }
    }
}

class AuthView : View("Auth") {
    val authController: AuthController by inject()

    override val root = stackpane {
        button(title).action {
            authController.tryAuth("admin", "admin")
        }
    }
}

class LoadingView : View("Loading...") {
    override val root = stackpane {
        label(title)
    }
}

class MainView : View("Main View") {
    override val root = stackpane {
        label(title)
    }
}

您必须记住，替换视图不会调整窗口大小（尽管您可以访问舞台并要求它调整到当前视图的大小），因此最好在单独的窗口中打开每个视图。

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