//在这里,我要转到CreateScreen
//每当我运行该应用程序时,都会显示导航。未定义导航
const IndexScreen = ({ navigation }) => {
navigation.setOptions({
headerRight: () => (
<TouchableOpacity onPress={() => navigation.navigate('CreateScreen')}>
<Icon name="plus" size={40} style={{ marginRight: 12 }} />
</TouchableOpacity>
)
})`
}