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React navigation header hooks example
function MyScreen({}) {
const [numSelected setNumSelected] = useState(false);
useHeaderTitle(numSelected > 0 ? `${numSelected} tasks selected` : 'Task selection');
return ...
}
function MyScreen({}) {
const [doApiRequest, isLoading] = useMyApi();
useHeaderRight(
isLoading ? <ActivityIndicator /> :
<Button onPress={doApiRequest}>Done</Button>
)
return ...
}
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