i have list rendering a rowComponent, until here everything is working, like this:
const [editing, setEditing] = useState(false);
nav.setOptions({
headerLeft: () => <Button
title='Edit'
onPress={() => {
setEditing(!editing)
>
</Button>
<MyList>
<CoinRow editing={editing}></CoinRow>
</MyList>
i have a left button for change the state of editing with setEditing
so now i need to How can I listen for changes to this variable in this component?
const CoinRow = ({ editing }) => {
console.log('editing', editing)
but never i see that console, i dont want to reload all the rows
If you want to listen to an event on a specific props (in your case the update of state), you need to use the useEffect
hook.
const [editing, setEditing] = useState(false);
useEffect(() => {
//The code that need to fire when "editing" is update
...
//By putting "editing" into this array, useEffect will listen on update on "editing"
}, [editing])
Note that useEffect
render at every first render of a component.
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