Develop Reference

React navigation not showing the right screen

I have created a navigation setup for my application that should start off with a welcome screen on the welcome screen you find two buttons, one for registering and the other for logging in.
When the user registers or logs in he get sent to other screens. I have created a stack navigator between the log in and register screen and put them in a loginFlow constant and another between the welcome screen and the loginFlow constant and the navigation between these screens works, but for some reason the welcome screen doesn't get shown first instead I get the sign up screen (register screen).
Why is that the case and how can i make the welcomeScreen get shown first
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>
);
};
here is the content of ResolveAuthscreen :
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;

As you have mentioned in your comments, you have an issue in your tryLocalSignin method. In that method, if there is no any token, you are navigating the user to the Signup screen. Instead of navigating to the Signup screen, navigate to the WelcomeScreen screen like:
const tryLocalSignin = (dispatch) => async () => {
const token = await AsyncStorage.getItem("token");
if (token) {
dispatch({ type: "signin", payload: token });
navigate("Main");
} else {
navigate("WelcomeScreen");
}
};

User role wise drawer navigation in react-native

I have added react-navigation-drawer for implementing drawer navigation in my app. I have created a file named PrimaryNav.js and added all navigation code in it.
import Login from './components/Login';
import Employee from './pages/Employee';
import { createAppContainer,SafeAreaView, } from 'react-navigation'
import { createDrawerNavigator, DrawerItems } from 'react-navigation-drawer';
import React from 'react';
const Primary_Nav = createDrawerNavigator({
Login: {
screen: Login,
navigationOptions: {
drawerLabel: () => null
}
},
Home_kitchen: {
screen: Home_kitchen,
navigationOptions: {
drawerLabel: "Home"
}
},
Employee: {
screen: Employee,
navigationOptions:{
drawerLabel:"Employee",
}
},
},{
initialRouteName:'Login',
drawerPosition: 'left',
drawerType: "slide",
}
});
const PrimaryNav = createAppContainer(Primary_Nav);
export default PrimaryNav;
Something like above. I have called this file in the App.js, the issue I am facing is I need to set a drawer item based on the role which the user has. So if the user role is cashier he should not be able to see all the menu.
All the pages are coming properly in the drawer menu but the question is how should I want to manage menu role wise in my app and changed the menu based on the roles of the user?

hi I saw your issue and I am trying to helping you.
I have make a custom design for drawer components .
-firstly you can create a extra file for drawer Design like DrawerComponent.js
and import in your code where you are create a drawer navigator
import DrawerComponent from "./DrawerComponent";
const Primary_Nav = createDrawerNavigator(
{
Login: {
screen: Login,
navigationOptions: {
drawerLabel: () => null
}
},
Home_kitchen: {
screen: Home_kitchen,
navigationOptions: {
drawerLabel: "Home"
}
},
Employee: {
screen: Employee,
navigationOptions: {
drawerLabel: "Employee"
}
}
},
{
initialRouteName: "Login",
drawerPosition: "left",
drawerType: "slide",
contentComponent: DrawerComponent // i added this DrawerComponent
}
);
const PrimaryNav = createAppContainer(Primary_Nav);
export default PrimaryNav;
now in the DrawerComponent.js
import React, { Component } from "react";
import { Text, View, TouchableOpacity } from "react-native";
export default class DrawerComponent extends Component {
constructor(props) {
super(props);
this.state = {
role: 1 // i used 1 for cashier and 0 for chef
};
}
render() {
const { role } = this.state;
const { navigation } = this.props;
return (
<View style={{ flex: 1, paddingVertical: 40, paddingHorizontal: 20 }}>
<TouchableOpacity
style={{ margin: 20 }}
onPress={() => navigation.navigate("Home_kitchen")}
>
<Text>Home</Text>
</TouchableOpacity>
{role ? (
<TouchableOpacity
style={{ margin: 20 }}
onPress={() => navigation.navigate("Employee")}
>
<Text>Employee</Text>
</TouchableOpacity>
) : null}
</View>
);
}
}
if you are change the role to 0 then the Employee tab is disable in Drawer Navigator I have user the ternary operator for conditions. you can modify is as you can want. hope it will helpful for you.

How can I move from splash screen to login screen after some seconds in react native?

I am a beginner in react native and very confused about navigation between two screens after x second delay.
How can I move from splash screen to login screen after some seconds in react native?

this is how iv'e achieved that by having a splashscreen as inital route in stackNavigator and then in componentDidMount after 3 secs im navigating to LoginScreen.
{
initialRouteName: "SplashScreen"
}
this is inside the stack navigator.
and inside the componentDidMount of the splashScreen class im doing this
componentDidMount(){
window.setTimeout(async () => {
const token = await isSignedIn();
this.props.navigation.navigate(token ? 'HomeScreen' : 'OnBoardingScreen');
}, 3000);
}
so what im doing is, im checking if token is stored in asyncStorage by the isSignedIn(). and if token is present then im navigating to HomeScreen or LoginScreen respectively after 3 secs.(3000 denotes in ms)
Feel free for doubts.
UPDATE:
import React, { Component } from 'react';
import { View, StatusBar } from 'react-native';
import { isSignedIn } from '../../services/auth';
import Animation from "lottie-react-native";
import styles from './SplashScreenStyle';
export default class SplashScreen extends Component {
componentDidMount() {
StatusBar.setHidden(true);
this._playAnimation();
window.setTimeout(async () => {
const token = await isSignedIn();
this.props.navigation.navigate(token ? 'HomeScreen' : 'OnBoardingScreen');
}, 2120);
}
state = {
animation: null,
};
_playAnimation = () => {
if (!this.state.animation) {
this._loadAnimationAsync();
} else {
this.animation.play();
}
};
_loadAnimationAsync = async () => {
let result = await fetch(
"https://assets1.lottiefiles.com/packages/lf20_vi3n1R.json"
)
.then(data => {
return data.json();
})
.catch(error => {
console.error(error);
});
this.setState({ animation: result }, this._playAnimation);
};
render() {
return (
<View style={styles.animationContainer}>
{this.state.animation && (
<Animation
ref={animation => {
this.animation = animation;
}}
style={{ width: 200, height: 200, backgroundColor: "transparent" }}
source={this.state.animation}
/>
)}
</View>
);
}
}

drawerLockMode : 'locked-closed' not working directly with createStackNavigator

When I specify drawerLockMode direactly with createStackNavigator it is not working.
const drawerStack = createStackNavigator({
HomeScreen: { screen: HomeScreen },
}, {
headerMode: 'screen',
navigationOptions: {
drawerLockMode:'locked-closed'
}
})
But when I use drawerStack variable to define navigationOptions, it is working.
drawerStack.navigationOptions = ({ navigation }) => {
drawerLockMode = 'locked-closed';
return {
drawerLockMode,
};
};
Am I doing any mistake when I am directly using it inside createStackNavigator?
Update
As #bennygenel suggested, we need to user drawerLockMode in drawerNavigator instead of stackNavigator. Here is what i have done.
const drawerNavigator = createDrawerNavigator({
drawerStack: drawerStack
}, {
contentComponent: DrawerComponent,
navigationOpions:{
drawerLockMode:'locked-closed'
}
})
But it is not working in this way also. The only way it is working is by using the const variable created using createStackNavigator or createDrawerNavigator

Try the following code, it's working for me:
const UserHome_StackNavigator = StackNavigator({
userHm: {
screen: UserHome,
navigationOptions: ({ navigation }) => ({
title: 'User screen title',
headerStyle: {
backgroundColor: 'white',
},
headerTintColor: 'black'
}),
},
});
UserHome_StackNavigator.navigationOptions = ({ navigation }) => {
let drawerLockMode = 'locked-closed';
//logic here to change conditionaly, if needed
return {
drawerLockMode,
};
};

in case someone need this:
const drawerNavigator = createDrawerNavigator({
drawerStack: drawerStack
}, {
contentComponent: DrawerComponent,
navigationOpions: ({navigation}) => {
let routeName = navigation.state.routes[navigation.state.routes.length-1].routeName;
if(['Animation', 'Splash', 'Intro', 'Login', 'Signup'].indexOf(routeName)>=0){
return {
drawerLockMode: 'locked-closed'
}
}
return {}
}
})

I want to display a list created by the user / React Native + Redux

I want my apps to display what the user entered in the tag under it with Redux.
So this is my container:
const mapStateToProps = state => ({
text: state
})
const mapDispatchToProps = (dispatch) => ({
addToList: () => { dispatch({ type: 'ADD_LIST' }) },
})
export default connect(mapStateToProps, mapDispatchToProps)(TodoList)
Here is my component:
class TodoList extends Component {
render() {
return (
<View>
<TextInput
style={{height: 40, width: 300}}
placeholder="Type here to translate!"
onChangeText={(text) => this.props.text}
/>
<Button
title="Submit"
onPress={this.props.addToList}/>
<View>
<Text>{this.props.text}</Text>
</View>
</View>
)
}
}
export default TodoList;
Here is the Store:
export const todoList = (state = [], action = {}) => {
switch (action.type) {
case 'ADD_LIST':
return [
...state,
action.todo
];
default:
return state;
}
}
let storeTodoList = createStore(todoList);
export default storeTodoList;
So i'm trying to get the text entered, add it to a list stored in the store and then display it, but i have absolutely no clue how to do this...

You have a few things going on here...
Your onChangeText listener isn't doing anything. You need to capture the text entered into the component and send it to your dispatcher.
You need to include the new text passed in as part of your action creator.
mapStateToProps is responsible for taking the elements in application state and mapping it to the props to be made available to your component. For this example, your application state is pretty simple. It is just { text: 'SOME TEXT' }.
You need to create a Provider for your Redux store. It should work at the root level of your app.
Here are all of the parts:
App.js (the application controller where the Provider is created)
import React, { Component } from 'react';
import { Provider } from 'react-redux';
import todoList from './actions/Reducer';
import { createStore } from 'redux';
import Root from './Root';
class App extends Component {
store = createStore(todoList);
render() {
return (
<Provider store={this.store}>
<Root/>
</Provider>
)
}
}
export default App;
Root.js
import React, { Component } from 'react';
import { View, TextInput, Button, Text } from 'react-native';
import { connect } from 'react-redux';
class Root extends Component {
render() {
const displayText = this.props.textList.join();
return (
<View>
<TextInput
style={{height: 40, width: 300}}
placeholder="Type here to translate!"
onChangeText={(text) => this.props.updateField(text)}
/>
<Button
title="Submit"
onPress={() => this.props.addToList(this.props.text)}/>
<View>
<Text>{displayText}</Text>
</View>
</View>
)
}
}
const mapStateToProps = state => ({
text: state.textField,
textList: state.list
});
const mapDispatchToProps = (dispatch) => ({
updateField: (newText) => { dispatch({ type: 'FIELD_CHANGE', text: newText })},
addToList: (text) => { dispatch({ type: 'ADD_LIST', text: text }) },
});
export default connect(mapStateToProps, mapDispatchToProps)(Root)
Reducer.js (controls your state object)
const INITIAL_STATE = {
textField: '',
list: []
};
export default todoList = (state = INITIAL_STATE, action = {}) => {
switch (action.type) {
case 'FIELD_CHANGE':
return {
...state,
textField: action.text
};
case 'ADD_LIST':
return {
textField: '',
list: [...state.list, action.text]
};
default:
return state;
}
};
EDIT-Changed example to add to a list. Note: This is not the proper way to show a list of items in RN. I'm just throwing the string into a Text field for the example. Use FlatList to properly show a list of items.