I'm trying to set scroll to top function in a screen which contains ListView when already focused tab is clicked.
I'm using react-navigation 2.0.0 and react-native 0.59.8 Here is how my navigator looks like:
FeedScreen.js returns
render() {
return <Nodes {...this.props} />;
}
Nodes.js
callScrollToTop = () => {
this.listView.scrollToOffset({ offset: 0, animated: true });
}
componentDidMount(){
this.props.navigation.setParams({
scrollToTop: this.callScrollToTop
})
}
// Here, I am able to set a string param like name: "Alice" and that can be seen in navigation state on TabBarOnPress
const Feed = createStackNavigator({
Feed: {
screen: FeedScreen
}
});
const Profile = createStackNavigator({
Profile: {
screen: ProfileScreen
}
});
const TabsScreens = createBottomTabNavigator(
{
Feed,
Profile
},
{
navigationOptions: ({ navigation }) => ({
tabBarOnPress: ({ navigation }) => {
if (
navigation.isFocused() &&
navigation.state.params &&
navigation.state.params.scrollToTop
) {
navigation.state.params.scrollToTop();
}
})
})
I don't want an exact solution like scrolling list view to top. Ability to set a function as param on componentDidMount and access it on tabBarOnPress is enough. Please help me find a solution to this.
Thanks!!
In your respective tab component use these,
import { NavigationEvents } from 'react-navigation';
render() {
return (
<View>
<NavigationEvents
onWillFocus={(route) => {
if (route.action.routeName === /* check the screen name mentioned in the routes */) {
//call the function u need
}
}}
/>
// add other components as usual
</View>
);
}
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