我想在用户按下“添加约会”按钮时显示所选的日期,开始时间和结束时间。但是,当我按下添加约会按钮时,数据被添加到我的数据库中,但无法在FlatList上显示。
下面提供的代码段(如果需要完整的代码,我可以提供):
export default class FrCreateScreen extends Component {
//test
addTimeDateAppt() {
let self = this;
AsyncStorage.getItem('my_token').then((keyValue) => {
console.log('Freelancer Create Screen (keyValue): ', keyValue);
axios({
method: 'post',
url: Constants.API_URL + 'appointment_f/create_appointment/',
//responseType: 'json',
data: {
app_date_start: this.state.textAppointmentDate,
start_time: this.state.textAppointmentTime,
end_time: this.state.textEndTime,
},
headers: {
'X-API-KEY': Constants.API_KEY,
'Authorization': keyValue,
},
}).then(function (response) {
this.setState({
timeSlots: [
...this.state.timeSlots,
{
apptdate: this.state.textAppointmentDate,
appttime: this.state.textAppointmentTime,
endTime: this.state.textEndTime,
}
],
});
console.log(response.data);
}).catch(function (error) {
console.log('Create Error: ', error);
});
});
}
//test
deleteDateTime = (id) => {
const filteredData = this.state.timeSlots.filter(item => item.id !== id);
this.setState({ timeSlots: filteredData });
}
render() {
return (
<ScrollView>
{this.getAppointmentDatePage()}
{this.getAppointmentTimePage()}
{this.getEndTimePage()}
<TouchableOpacity
style={styles.addContainer}
onPress={() => this.addTimeDateAppt()}
>
<Text style={styles.addText}> Add Appointment </Text>
</TouchableOpacity>
<View>
<FlatList
data={this.state.timeSlots}
keyExtractor={({ id }, index) => index.toString()}
renderItem={({ item, index }) => {
return (
<View style={styles.containerList}>
<View style={styles.dateList}>
<Text style={{ fontWeight: 'bold' }}>Date: </Text>
<Text style={styles.textTime}>{item.apptdate}</Text>
</View>
<View style={styles.row}>
<View>
<Text style={{ fontWeight: 'bold' }}>Start Time:</Text>
<Text style={styles.textTime}>{item.appttime}</Text>
</View>
<View>
<Text style={{ fontWeight: 'bold' }}>End Time:</Text>
<Text style={styles.textTime}>{item.endTime}</Text>
</View>
<TouchableOpacity
onPress={() => this.deleteDateTime(item.index)}
>
<Feather name="trash" style={styles.icon} />
</TouchableOpacity>
</View>
</View>
);
}}
/>
</View>
</ScrollView>
)
};
};
截屏:
答案 0 :(得分:1)
该错误表示“状态”不存在。
您是否尝试过将方法更改为箭头功能,即
addTimeDateAppt = () => {...}
这会将方法绑定到组件的实例,并且对'this.state'的引用将起作用。
您还声明了变量“ self”,它引用“ this”,但是无论如何在该方法中继续使用“ this”。不知道这是否是故意的,但是如果使用箭头语法,则不需要。