Question

我为我的应用程序创建了一个导航设置，该设置应从欢迎屏幕开始，在欢迎屏幕上，您会找到两个按钮，一个用于注册，另一个用于登录。

当用户注册或登录时，他将被发送到其他屏幕。我已经在登录和注册屏幕之间创建了一个堆栈导航器，并将它们放置在loginFlow常量中，并将其放置在welcome屏幕和loginFlow常量之间，并且在这些屏幕之间进行导航，但是由于某些原因，未显示欢迎屏幕首先，我得到了注册屏幕（注册屏幕）。

为什么会这样，如何使welcomeScreen首先显示

import React from "react";
import { View } from "react-native";
import WeclomeScreen from "./app/screens/WelcomeScreen";
import MainScreen from "./app/screens/MainScreen";
import AccountScreen from "./app/screens/AccountScreen";
import { Provider as AuthProvider } from "./app/context/AuthContext";
import { createMaterialBottomTabNavigator } from "react-navigation-material-bottom-tabs";
import SignupScreen from "./app/screens/SignupScreen";
import { createAppContainer, createSwitchNavigator } from "react-navigation";
import { createStackNavigator } from "react-navigation-stack";
import ResultShowScreen from "./app/screens/ResultShowScreen";
import ResolveAuthScreen from "./app/screens/ResolveAuthScreen";
import SigninScreen from "./app/screens/SigninScreen";
import ArticleSaveScreen from "./app/screens/ArticleSaveScreen";
import { setNavigator } from "./app/navigationRef";

const articleListFlow = createStackNavigator({
  Main: MainScreen, // screen with diffrent articles categories
  ResultsShow: ResultShowScreen, // article details screen
});
const loginFlow = createStackNavigator({
  Signup: SignupScreen,
  Signin: SigninScreen,
});
loginFlow.navigationOptions = () => {
  return {
    headerShown: false,
  };
};

articleListFlow.navigationOptions = {
  title: "News Feed",
  tabBarIcon: ({ tintColor }) => (
    <View>
      <Icon style={[{ color: tintColor }]} size={25} name={"ios-cart"} />
    </View>
  ),
  activeColor: "#ffffff",
  inactiveColor: "#ebaabd",
  barStyle: { backgroundColor: "#d13560" },
};
const switchNavigator = createSwitchNavigator({
  ResolveAuth: ResolveAuthScreen,
  MainloginFlow: createStackNavigator({
    WelcomeScreen: WeclomeScreen,
    loginFlow: loginFlow,
  }),

  mainFlow: createMaterialBottomTabNavigator(
    {
      articleListFlow: articleListFlow,
      ArticleSave: ArticleSaveScreen, // we dont need this one
      Account: AccountScreen,
    },
    {
      activeColor: "#ffffff",
      inactiveColor: "#bda1f7",
      barStyle: { backgroundColor: "#6948f4" },
    }
  ),
});
const App = createAppContainer(switchNavigator);
export default () => {
  return (
    <AuthProvider>
      <App
        ref={(navigator) => {
          setNavigator(navigator);
        }}
      />
    </AuthProvider>
  );
};

这是ResolveAuthscreen的内容：


import React, { useEffect, useContext } from "react";
import { Context as AuthContext } from "../context/AuthContext";

const ResolveAuthScreen = () => {
  const { tryLocalSignin } = useContext(AuthContext);

  useEffect(() => {
    tryLocalSignin();
  }, []);

  // not returning anything since just waiting to check the token
  // will transition to signin or signup very quickly
  return null;
};

export default ResolveAuthScreen;

Answer 1

正如您在评论中提到的那样，您的InnoDB: using atomic writes. 2020-05-26 19:29:04 0 [Note] InnoDB: Mutexes and rw_locks use Windows interlocked functions 2020-05-26 19:29:04 0 [Note] InnoDB: Uses event mutexes 2020-05-26 19:29:04 0 [Note] InnoDB: Compressed tables use zlib 1.2.11 2020-05-26 19:29:04 0 [Note] InnoDB: Number of pools: 1 2020-05-26 19:29:04 0 [Note] InnoDB: Using SSE2 crc32 instructions 2020-05-26 19:29:04 0 [Note] InnoDB: Initializing buffer pool, total size = 16M, instances = 1, chunk size = 16M 2020-05-26 19:29:04 0 [Note] InnoDB: Completed initialization of buffer pool 2020-05-26 19:29:04 0 [Note] InnoDB: Starting crash recovery from checkpoint LSN=323988 2020-05-26 19:29:04 0 [Note] InnoDB: 128 out of 128 rollback segments are active. 2020-05-26 19:29:04 0 [Note] InnoDB: Removed temporary tablespace data file: "ibtmp1" 2020-05-26 19:29:04 0 [Note] InnoDB: Creating shared tablespace for temporary tables 2020-05-26 19:29:04 0 [Note] InnoDB: Setting file 'C:\xampp\mysql\data\ibtmp1' size to 12 MB. Physically writing the file full; Please wait ... 2020-05-26 19:29:04 0 [Note] InnoDB: File 'C:\xampp\mysql\data\ibtmp1' size is now 12 MB. 2020-05-26 19:29:04 0 [Note] InnoDB: 10.4.11 started; log sequence number 323997; transaction id 328 2020-05-26 19:29:04 0 [Note] InnoDB: Loading buffer pool(s) from C:\xampp\mysql\data\ib_buffer_pool 2020-05-26 19:29:04 0 [Note] Plugin 'FEEDBACK' is disabled. 2020-05-26 19:29:04 0 [Note] Server socket created on IP: '::'.方法中存在问题。在这种方法中，如果没有任何tryLocalSignin，则将用户导航到token屏幕。代替导航到Signup屏幕，而是导航到Signup屏幕：

WelcomeScreen

反应导航未显示正确的屏幕

1 个答案: