In App.js
const MyApp = createDrawerNavigator({
Home: {
screen: Home
},
Form: {
screen: Form // how to pass value Id = 0
},
{
....
}
})
in Form.js
componentDidMount() {
if (this.props.navigation.getParam('Id', 1) !== 0) {
...
}
else {
...
}
}
Can anyone tell me how to achieve this?
Thanks in advance
Use Screen Props:
const MyApp = createDrawerNavigator({
Home: {
screen: Home
},
Form: {
screen: props => <Form {...props} id={0} />
},
{
....
}
})
In <Form {..props} id={0} /> you need to pass all props using {...props} so that navigation work correctly.
Then, you can access props from the Form screen and use it according to your use case.
Related
Like so:
I'm running react-navigation v4.
First you have to follow the tutorial on how to set up a react-navigation modal, the one that has a jump animation and doesn't look like the native formSheet. You have to set up a stack navigator with your root navigator as one child and the modal as another:
And it scales, because you can have more than one of these modals as children.
The code for this is the following:
const RootNavigator = createStackNavigator(
{
index: { screen: AppNavigator },
[NC.SCREEN_ROOM_INFO]: { screen: RoomInfoNavigator },
[NC.SCREEN_CHAT_CREATE]: { screen: RoomCreateNavigator },
[NC.SCREEN_CHAT_SEARCH]: { screen: ChatSearchNavigator },
[NC.SCREEN_CHAT_GIF_PICKER]: { screen: GifPickerNavigator }
},
{
mode: 'modal',
headerMode: 'none',
transitionConfig: () => ({
transitionSpec: {
duration: 0
}
}),
transparentCard: true
}
)
Then you need to implement these, from my example, 4 navigators that will be displayed as modals each like so:
// Here you'll specify the screens you'll navigate in this modal, starting from index.
const RoomInfoStack = createStackNavigator({
index: { screen: NavigableRoomInfo },
[NC.SCREEN_ROOM_ROSTER]: { screen: NavigableRoomRoster },
[NC.SCREEN_ROOM_NOTIFICATION_PREFERENCES]: { screen: NavigableRoomNotificationPreferences },
[NC.SCREEN_ROOM_EDIT]: { screen: NavigableRoomEdit }
})
type NavigationComponent<T = any> = {
navigation?: NavigationScreenProp<NavigationState, T>
}
type Props = NavigationComponent
// THIS code is from the react-navigation tutorial on how to make a react-navigation modal:
// https://reactnavigation.org/docs/4.x/custom-navigators/#extending-navigators
class RoomInfoNavigator extends React.Component<Props> {
static router = {
...RoomInfoStack.router,
getStateForAction: (action, lastState) => {
// check for custom actions and return a different navigation state.
return RoomInfoStack.router.getStateForAction(action, lastState)
}
}
constructor(props) {
super(props)
this.onClose = this.onClose.bind(this)
}
onClose() {
this.props.navigation?.goBack()
}
// And here is the trick, you'll render an always open RN formSheet
// and link its dismiss callbacks to the goBack action in react-navigation
// and render your stack as its children, redirecting the navigator var to it in props.
render() {
return (
<Modal
visible={true}
animationType={'slide'}
supportedOrientations={['portrait', 'landscape']}
presentationStyle={'formSheet'}
onRequestClose={() => this.onClose()}
onDismiss={() => this.onClose()}
>
<RoomInfoStack {...this.props} />
</Modal>
)
}
}
export { RoomInfoNavigator }
This export is what our root stack imported before. Then you just need to render the screens, I have a pattern that I do to extract the navigation params to props in case this screen is ever displayed without navigation:
const NavigableRoomInfo = (props: NavigationComponent<RoomInfoProps>) => {
const roomInfo = props.navigation!.state!.params!.roomInfo
const roomInfoFromStore = useRoomFromStore(roomInfo.id)
// Here I update the navigation params so the navigation bar also updates.
useEffect(() => {
props.navigation?.setParams({
roomInfo: roomInfoFromStore
})
}, [roomInfoFromStore])
// You can even specify a different Status bar color in case it's seen through modal view:
return (
<>
<StatusBar barStyle="default" />
<RoomInfo roomInfo={roomInfoFromStore} navigation={props.navigation} />
</>
)
}
Sources:
https://reactnavigation.org/docs/4.x/modal
https://reactnavigation.org/docs/4.x/custom-navigators/#extending-navigators
I am using HOC to get current user details on login for each route in my react native application using ApolloClient.
Below is my main component App.tsx:
import { createBottomTabNavigator } from 'react-navigation-tabs';
import { createStackNavigator } from 'react-navigation-stack';
const client = new ApolloClient({
cache,
link: errorLink.concat(authLink.concat(httpLink))
});
const TabStack = createBottomTabNavigator({
Feed: {
screen: Feed
},
Upload: {
screen: Upload
},
Profile: {
screen: Profile
}
})
const MainStack = createStackNavigator(
{
Home: { screen: TabStack },
User: { screen: UserProfile },
Comments: { screen: Comments },
Post: { screen: Post }
},
{
initialRouteName: 'Home',
mode: 'modal',
headerMode: 'none'
}
)
const AppContainer = createAppContainer(MainStack);
//Here I assign HOC to AppContainer
const RootWithSession = withSession(AppContainer);
class App extends PureComponent {
constructor(props) {
super(props);
}
render() {
return (<ApolloProvider client={client}>
<RootWithSession/>
</ApolloProvider>)
}
}
export default App;
Below is HOC withSession.tsx:
export const withSession = Component=>props=>(
<Query query={GET_CURRENT_USER}>
{({data,loading,refetch})=>{
if (loading) {
return null;
}
console.log(data);
return <Component {...props} refetch={refetch}/>;
}}
</Query>
)
I want to pass refetch function to all the components
<Component {...props} refetch={refetch}/>
How to do this? Any help is greatly appreciated.
I was able to pass refetch function to all Components from HOC withSession component using ScreenProps of StackNavigator as below:
export const withSession = Component=>props=>(
<Query query={GET_CURRENT_USER}>
{({data,loading,refetch})=>{
if (loading) {
return null;
}
if(props && props.navigation){
//props.refetch = refetch;
console.log(props)
//props.navigation.refetch = refetch;
props.navigation.setParams({refetch});
}
return <Component screenProps={{refetch}} {...props} refetch={refetch}/>;
}}
</Query>
)
Now, I am able to get refetch method using this.props.screenProps.refetch
I'm trying to add a state change event to a nested navigator.
Usually I would define it like this:
const TabNavigator = createMaterialTopTabNavigator({
Home: {
screen: Home,
},
Next: {
screen: NextNavigator,
},
})
but I need something like this:
const TabNavigator = createMaterialTopTabNavigator({
Home: {
screen: Home,
},
Next: {
screen: (props)=>{ return <NextNavigator {...props}/> },
},
})
where the screen object is a function.
The problem is I have no idea what signature screen as a function has, and how to pass it to the navigator
I'm getting close with something like this:
screen: (props, state)=>{ return <NextNavigator {...props} state /> },
But it's still not correct.
Does anyone know how this works?
If you don't want #JeffGuKang to answer, you can declare and use global variables and functions.
let NICKNAME = '';
function setNickName(data) {
NICKNAME = data;
}
function getNickName() {
return NICKNAME;
}
export { setNickName,getNickName }
...
//set data
import { setNickName} from './globalpath';
setNickName(data)
....
//get data
import { getNickName} from './globalpath';
getNickName()
Use Params
Use setParams, getParam for changing state in components wrapped by navigatior.
A Component (Set changing value)
const name = this.props.navigation.setParams({ name: this.state.name, age: this.state.age });
B Component (Get value)
const name = this.props.navigation.getParam('name', 'DefaultValue');
const age = this.props.navigation.getParam('age' 0);
setParams is a trigger to run getParam in other components is wrapped navigation.
Extend Navigator
You can extend the component created by Naivgator as below. link
const MyStack = createStackNavigator({ ... });
class CustomNavigator extends React.Component {
static router = MyStack.router;
state = {
a: 'b',
}
render() {
const { navigation } = this.props;
return <MyStack {...this.state, ...this.props} />;
}
}
Or it is able to use functional component instead.
const MyStack = createStackNavigator({ ... });
CustomNavigator = (props) => {
return <MyStack {...props} />
}
const TabNavigator = createMaterialTopTabNavigator({
Home: {
screen: Home,
},
Next: {
screen: (props) => { return <MyStack {...props} /> },
},
Third: CustomNavigator,
})
And do not forget import `React` to use functional component.
I'm using react-navigation library. Currently the navigation is organized in this way:
App.js:
const Layout = createRootNavigator(signedIn);
return (
<AppFontLoader>
<Layout />
</AppFontLoader>
);
AppNavigator:
export const createRootNavigator = (signedIn = false) => {
return createSwitchNavigator(
{
SignedIn: {
screen: SignedIn
},
SignedOut: {
screen: SignedOut
}
},
{
initialRouteName: signedIn ? "SignedIn" : "SignedOut"
}
);
};
AppNavigator:
export const SignedIn = createMaterialBottomTabNavigator(
{
MeetingsScreen: {
...
}
MeetingsScreen:
const MeetingNavigator = createStackNavigator({
MeetingsListScreen: {
screen: MeetingsListScreen,
navigationOptions: {
}
},
AddMeetingForm: {
screen: AddMeetingFormScreen
},
MeetingScreen: {
screen: MeetingScreen
}
}, {initialRouteName: "MeetingsListScreen"});
The error is shown with the current structure:
You should only render one navigator explicitly in your app, and other navigators should by rendered by including them in that navigator.
Apparently, I shouldn't nest one navigator into another, but I'm struggling to come up with the right navigation structure.
How to organize the navigation so that I can have more layers of navigation to move between screens?
I've encountered the same issue, so what I ended up doing was just making one navigation. Rootstack. All routes are there. My app.js has only root stack and navigations.
I am programming React Native App. I am using react-navigation for navigating screens.
I have 2 Stack Navigators, they are stayed in a Tab Navigator. I want handle click event when I press tab item on TabBar to refresh its view.
export const HomeStack = StackNavigator({
Home: {screen: ScreenHome},
Detail: {screen: ScreenDetail}
})
export const UserStack = StackNavigator({
User: {screen: ScreenUser}
})
export const Tabbar = TabNavigator({
HomeTab: {
screen: HomeStack,
},
UserTab: {
screen: UserStack,
}
}, {
tabBarComponent: ({ jumpToIndex, ...props}) => (
<TabBarBottom
{...props}
jumpToIndex={(index) => {
if(props.navigation.state.index === index) {
props.navigation.clickButton(); //----> pass props params (code processes)
}
else {
jumpToIndex(index);
}
}
}
/>
),
tabBarPosition: 'bottom'
});
class TabClass extends Component{
constructor(props){
super(props)
this.clickButton = this.clickButton.bind(this)
}
clickButton(){
console.log('click button')
}
render (){
return (
<Tabbar clickButton={()=> this.clickButton()}/>
)
}
}
I want to pass clickButton() function from TabClass Component to the code which processes event click tab bar. When if(props.navigation.state.index === index), I want it will call clickButton(). I try it but it doesn't work.
Is there any way to solve my matter?
I tried onNavigationStateChange(prevState, currentState).
class TabClass extends Component{
constructor(props){
super(props)
this.clickButton = this.clickButton.bind(this)
}
clickButton(){
console.log('click button')
}
_handleNavagationStateChange(prevState, currentState){
console.log('handle navigation state change')
}
render (){
return (
<Tabbar onNavigationStateChange={(prevState, currentState) => {
this._handleNavagationStateChange(prevState, currentState)
}}
clickButton={()=> this.clickButton()}
/>
)
}
}
However, _handleNavagationStateChange(prevState, currentState) only run when navigation state changes (for examples, if I stay at HomeTab, I click User Tab Item, this function will run; if I stay at HomeTab, I click Home Tab Item, this function will not run).
Is there any way to handle click event on tab item.
according to the newest documentation here, you can use navigationOptions: {navigationOptions: () => doWhatever()} to handle tab bar taps.
From the react-navigation 4.x docs, you can override tabBarOnPress within navigationOptions:
tabBarOnPress: ({ navigation, defaultHandler }) => {
defaultHandler(); // Call the default handler to actually switch tabs
// do extra stuff here
},
Please try the code following when customize the event touch of TabBar:
import { TabBarBottom, TabNavigator, StackNavigator } from 'react-navigation';
export const MainScreenNavigator = TabNavigator({
Home: { screen: HomeViewContainer },
Search: { screen: SearchViewContainer },
}, {
tabBarComponent: ({ jumpToIndex, ...props, navigation }) => (
<TabBarBottom
{...props}
jumpToIndex = { tabIndex => {
const currentIndex = navigation.state.index;
if (tabIndex == 1) {
// do some thing. Call Native Live Stream Record
} else {
jumpToIndex(tabIndex);
}
console.log('Select tab: ', tabIndex);
}}
/>),
tabBarPosition: 'bottom',
});