我试图通过标记在“ SettingsScreen”中找到的“ BOB”复选框来隐藏\显示“ InfoTable”屏幕上的tableHead3: ['BANANA']。
我是React Native的新手，我不知道Redux。
有人可以向我展示如何以简单的方式处理我的示例吗？
这是“ OrderInformationScreen”
export default class OrderInformationScreen extends Component {
constructor(props) {
super(props);
const { state } = props.navigation;
this.state = {
title: state.params.data //navprops.params.data.SHORT_TEXT
}
//alert(JSON.stringify((state.params.data.SHORT_TEXT)))
}
render() {
return (
<>
<View
style={{
alignItems: 'flex-start',
justifyContent: 'center',
borderColor: 'blue',
flexDirection: "row",
justifyContent: 'space-evenly'
}}>
<TouchableOpacity onPress={() => console.log("cancel!")}>
<Avatar
size='large'
containerStyle={{ marginTop: 30 }}
activeOpacity={0.2}
rounded
source={require('../assets/down.png')} style={{ height: 80, width: 80 }}
onPress={() => console.log("cancel!")} />
<View >
<Text style={{ fontSize: 25, fontWeight: 'bold', color: 'red' }}>לדחות</Text>
</View>
</TouchableOpacity>
<TouchableOpacity onPress={() => console.log("works!")}>
<Avatar
size='large'
activeOpacity={0.1}
rounded
source={require('../assets/up.png')} style={{ height: 80, width: 80 }}
onPress={() => console.log("Works!")} />
<View>
<Text style={{ fontSize: 25, fontWeight: 'bold', color: 'green', marginHorizontal: 6 }}>לאשר</Text>
</View>
</TouchableOpacity>
</View>
<InfoTable headerInfo={this.state.title}></InfoTable>
</>
);
};
}
这是StackNavigator：
const PlacesNavigator = createStackNavigator({
Main: MainScreen,
MyTasks: MyTasksScreen,
Settings: SettingsScreen,
Sync: SyncScreen,
Info: OrderInformationScreen
},
{
defaultNavigationOptions: {
headerStyle: {
animationEnabled: true,
backgroundColor: Platform.OS === 'android' ? Colors.primary : ''
},
headerTintColor: Platform.OS === 'android' ? 'white' : Colors.primary,
}
}
);
export default createAppContainer(PlacesNavigator);
这是“ SettingsScreen”
import React, { useState, useEffect } from 'react';
import { View, Text } from 'react-native';
import { CheckBox } from 'react-native-elements';
const SettingsScreen = props => {
const [checked1, setChecked1] = useState(null);
const [checked2, setChecked2] = useState(null);
const [checked3, setChecked3] = useState(null);
const [checked5, setChecked5] = useState(null);
const [checked6, setChecked6] = useState(null);
const [checked7, setChecked7] = useState(true);
const [checked8, setChecked8] = useState(null);
const handlePress = title => {
if (title === 'LION') { //6
setChecked6(true), setChecked7(false), setChecked8(false)
} else if (title === 'ZEBRA') {//7
setChecked7(true), setChecked6(false), setChecked8(false)
} else {
setChecked8(true), setChecked7(false), setChecked6(false)
}
}
useEffect(() => {
setChecked7(true)
}, [])
return (
<View>
<CheckBox
iconLeft
checkedColor='red'
title="LIZARD"
checked={checked1}
onPress={() => setChecked1(prev => !prev)}
/>
<CheckBox
iconLeft
checkedColor='red'
title="BIRD"
checked={checked2}
onPress={() => setChecked2(prev => !prev)}
/>
<CheckBox
iconLeft
checkedColor='red'
title="SNAKE"
checked={checked3}
onPress={() => setChecked3(prev => !prev)}
/>
<CheckBox
iconLeft
checkedColor='red'
title="SOUND"
checked={checked5}
onPress={() => setChecked5(prev => !prev)}
/>
<CheckBox
iconLeft
checkedColor='green'
title='LION'
checkedIcon='dot-circle-o'
uncheckedIcon='circle-o'
checked={checked6}
onPress={() => handlePress('LION')}
/>
<CheckBox
iconLeft
checkedColor='green'
title='ZEBRA'
checkedIcon='dot-circle-o'
uncheckedIcon='circle-o'
checked={checked7}
onPress={() => handlePress('ZEBRA')}
/>
<CheckBox
iconLeft
checkedColor='green'
title='BOB'
checkedIcon='dot-circle-o'
uncheckedIcon='circle-o'
checked={checked8}
onPress={() => handlePress('BOB')}
/>
</View>
);
};
SettingsScreen.navigationOptions = {
headerTitle: 'SETTINGS'
};
export default SettingsScreen;
这是“ InfoTable”：
import React, { Component } from 'react';
import { StyleSheet, View, ScrollView } from 'react-native';
import { Table, Row, Rows } from 'react-native-table-component';
import Swiper from 'react-native-swiper'
export default class InfoTable extends Component {
constructor(props) {
super(props);
this.state = {
tableHead0: [`${this.props.headerInfo.SHORT_TEXT} (${(this.props.headerInfo.ORDERID).replace(/^0+/, '')})`],
tableHead3: ['BANANA'],//THIS I WANT HIDE AND SHOW
tableData3: [
['APPLE', `${this.props.headerInfo.COSTCENTER_TXT} (${(this.props.headerInfo.COSTCENTER)})`],
['MONKEY', `${this.props.headerInfo.LOC_WBS_ELEM_TXT} (${this.props.headerInfo.LOC_WBS_ELEM})`],
['FRIZ', `${this.props.headerInfo.SETTLORDER_TXT} (${this.props.headerInfo.SETTLORDER})`],
]
}
}
componentWillReceiveProps(nextProps) {
if (nextProps.headerInfo != null) {
this.setState({ tableHead0: [nextProps.headerInfo] })
}
alert(JSON.stringify(nextProps))
}
render() {
const state = this.state;
return (
<Swiper style={styles.wrapper} showsButtons={true}>
<ScrollView>
<View style={styles.container}>
<Table borderStyle={{ borderWidth: 2, borderColor: '#d83dff' }}>
<Row data={state.tableHead0} style={styles.head0} textStyle={styles.headText} />
<Row data={state.tableHead3} style={styles.head} textStyle={styles.headText} />
<Rows data={state.tableData3} textStyle={styles.text} />
</Table>
</View>
</ScrollView>
</Swiper>
)
}
}
const styles = StyleSheet.create({
container: { flex: 1, backgroundColor: '#fff' },
head0: { height: 80, backgroundColor: '#54beff' },
head: { height: 40, backgroundColor: '#9febf5' },
headText: { fontWeight: 'bold', fontSize: 20 },
text: { margin: 10 },
});
最佳答案
在设置屏幕中使用AsyncStorage保存选中的单选按钮的值，然后在InfoTable中检索该值。
在存储中节省价值。
import {
AsyncStorage,
...
} from 'react-native';
//save value in storage
const storeData = async (key, value) => {
try {
await AsyncStorage.setItem(key, value);
} catch (error) {
// Error saving data
}
};
// retrieve value
retrieveData = async key => {
try {
const value = await AsyncStorage.getItem(key);
if (value !== null) {
// We have data!!
return value;
}
} catch (error) {
// Error retrieving data
}
};
修改手柄在设置屏幕中按
const handlePress = title => {
if (title === 'LION') {
//6
setChecked6(true), setChecked7(false), setChecked8(false);
// remove key from storage
AsyncStorage.removeItem('checkbox').catch(e => console.log(e));
} else if (title === 'ZEBRA') {
//7
setChecked7(true), setChecked6(false), setChecked8(false);
// remove key from storage
AsyncStorage.removeItem('checkbox').catch(e => console.log(e));
} else {
setChecked8(true), setChecked7(false), setChecked6(false);
// add key to storage
storeData('checkbox', 'tableHead3').catch(e => console.log(e));
}
};
在InfoTable中从存储中获取值
state = {
checkBoxKey: '', // used to store value from storage
// I've added new object to store all the table data
tableData: {
tableHead0: [`${'SHORT_TEXT'} (${'ORDERID'})`],
tableHead3: ['BANANA'], //THIS I WANT HIDE AND SHOW
tableData3: [
['APPLE', `${'COSTCENTER_TXT'} (${'COSTCENTER'})`],
['MONKEY', `${'LOC_WBS_ELEM_TXT'} (${'LOC_WBS_ELEM'})`],
['FRIZ', `${'SETTLORDER_TXT'} (${'SETTLORDER'})`],
],
},
}
componentDidMount = async () => {
try {
const data = await this.retrieveData('checkbox');
if (data) {
this.setState(
{
checkBoxKey: data,
},
() => console.log(this.state.checkBoxKey)
);
}
} catch (e) {
console.log(e);
}
};
在渲染中，从状态获取
checkBoxKey并将其用于过滤表数据。render = () => {
const state = this.state;
const tableData = state.tableData;
const displayKeys = Object.keys(tableData).filter(key => {
return key !== this.state.checkBoxKey;
});
return (
<Swiper style={styles.wrapper} showsButtons={true}>
<ScrollView>
<View style={styles.container}>
<Table borderStyle={{ borderWidth: 2, borderColor: '#d83dff' }}>
{displayKeys &&
displayKeys.map(key =>
this.is2dArray(tableData[key]) ? (
<Rows data={tableData[key]} textStyle={styles.text} />
) : (
<Row data={tableData[key]} textStyle={styles.text} />
)
)}
</Table>
</View>
</ScrollView>
</Swiper>
);
};
DEMO
关于javascript - native react -有隐藏/显示另一个页面中的项目的方法吗？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/60360557/