有人有使用react-native-dropdown-picker库中的hooks和function设置默认值的例子吗?或者有其他库可以更简单地实现这个功能。
export default function OrphanageData() {
const [date, setDate] = useState(new Date())
const [value, setValue] = useState();
const [items, setItems] = useState([{}]);
let controller;
返回(
<>
<StatusBar backgroundColor="#15c3d6"/>
<ScrollView style={styles.container} contentContainerStyle={{ padding: 24 }}>
<Text style={styles.title}>Compras</Text>
<Text style={styles.label}> ID - Brinco</Text>
<TextInput
style={styles.input}
/>
<DropDownPicker
items={items}
controller={instance => controller = instance}
onChangeList={(items, callback) => {
new Promise((resolve, reject) => resolve(setItems(items)))
.then(() => callback())
.catch(() => {});
}}
defaultValue={value}
onChangeItem={item => setValue(item.value)}
/>
<RectButton style={styles.nextButton} onPress={() => {}}>
<Text style={styles.nextButtonText}>Cadastrar</Text>
</RectButton>
</ScrollView>
</>
) }