我在减速器中有如下初始状态
const initialState = {
medicationschedule: [
{
date: '2019-08-27',
medications: [
{
title: '8.00 AM',
data: [
{name:'item1', isTaken: 1,mg: '500 mg',capsules:'capsule'},
{name:'item2', isTaken: 4,mg: '2000 mg',capsules:'teaspoon'}
]},
{
title: '12.03 PM',
data: [
{name:'item3', isTaken: 2,mg: '500 mg',capsules:'capsule'},
{name:'item4', isTaken: 1,mg: '500 mg',capsules:'capsule'}
]},
{
title: '3.30 PM',
data: [
{name:'item1', isTaken: 3,mg: '500 mg',capsules:'capsule'}
]},
]
}
],
medication: [
{
title: '8.00 AM',
data: [
{name:'item1', isTaken: 1,mg: '500 mg',capsules:'capsule'},
{name:'item2', isTaken: 4,mg: '2000 mg',capsules:'teaspoon'}
]},
{
title: '12.03 PM',
data: [
{name:'item3', isTaken: 2,mg: '500 mg',capsules:'capsule'},
{name:'item4', isTaken: 1,mg: '500 mg',capsules:'capsule'}
]},
{
title: '3.30 PM',
data: [
{name:'item1', isTaken: 3,mg: '500 mg',capsules:'capsule'}
]},
]
};
我的 React Native 课程如下SectionList
。
class HomeScreen extends Component {
state = {
selectedDate: Date(),
isModalVisible: false,
};
render() {
return (
<SafeAreaView style={styles.containter}>
<SectionList
renderItem={({item, index, section}) => <MedicineRow showTitle={0} key={index} setWidth='80%' title={item.name} mg={item.mg} capsules={item.capsules} onPress={() => this.medicineRowTapped(item.name)} medstatus={item.isTaken}/>}
stickySectionHeadersEnabled={false}
renderSectionHeader={({section: {title}}) => (
<SectionTitle showTitle={true} title={title}/>
)}
sections={
this.props.filteredMedications
}
keyExtractor={(item, index) => item + index}
/>
</SafeAreaView>
)
}
}
function mapStateToProps(state) {
return {
filteredMedications : state.medication
}
}
export default connect(mapStateToProps)(HomeScreen)
如果我按照mapStateToProps
. 但是,如果我尝试medictionschedule
根据日期过滤其中的数据,则 sectionlist 不会在屏幕上加载任何内容。
在外部函数中过滤也无济于事,如下所示。
medicineForTheDate = () => {
this.props.filteredMedications.filter((schedule) => {
if (schedule.date === '2019-08-27') {
return schedule.medications
}
})
}
然后在里面SectionList
我会打电话this.medicineForTheDate()
<SectionList
renderItem={({item, index, section}) => <MedicineRow showTitle={0} key={index} setWidth='80%' title={item.name} mg={item.mg} capsules={item.capsules} onPress={() => this.medicineRowTapped(item.name)} medstatus={item.isTaken}/>}
stickySectionHeadersEnabled={false}
renderSectionHeader={({section: {title}}) => (
<SectionTitle showTitle={true} title={title}/>
)}
sections={
this.medicineForTheDate()
}
keyExtractor={(item, index) => item + index}
/>
我也尝试在内部过滤,mapsStateToProps
但这也没有帮助。
function mapStateToProps(state) {
return {
filteredMedications : state.medicationschedule.filter((schedule)=>{ schedule.date === '2019-08-27' })
}
}
进而...
<SectionList
renderItem={({item, index, section}) => <MedicineRow showTitle={0} key={index} setWidth='80%' title={item.name} mg={item.mg} capsules={item.capsules} onPress={() => this.medicineRowTapped(item.name)} medstatus={item.isTaken}/>}
stickySectionHeadersEnabled={false}
renderSectionHeader={({section: {title}}) => (
<SectionTitle showTitle={true} title={title}/>
)}
sections={
this.props.filteredMedications.medications
}
keyExtractor={(item, index) => item + index}
/>
在这种情况下如何过滤数据?