useEffect(() => {
console.log("useEffect setspHeight--->", setspHeight); 类组件代码
import React, { Fragment, useState, Component } from 'react';
import styles from './styles';
import { withStyles } from '@material-ui/core/styles';
import classnames from 'classnames';
import ExpandMoreIcon from '@material-ui/icons/ExpandMore';
import IconButton from '@material-ui/core/IconButton';
import Button from '@material-ui/core/Button';
import ExpansionPanel from '@material-ui/core/ExpansionPanel';
import ExpansionPanelSummary from '@material-ui/core/ExpansionPanelSummary';
import ExpansionPanelDetails from '@material-ui/core/ExpansionPanelDetails';
import Typography from '@material-ui/core/Typography';
import Drawer from '@material-ui/core/Drawer';
import AppBar from '@material-ui/core/AppBar';
import Tabs from '@material-ui/core/Tabs';
import Tab from '@material-ui/core/Tab';
import { FontAwesomeIcon } from '@fortawesome/react-fontawesome';
import Radio from '@material-ui/core/Radio';
import RadioGroup from '@material-ui/core/RadioGroup';
import FormControlLabel from '@material-ui/core/FormControlLabel';
import FormControl from '@material-ui/core/FormControl';
import FormLabel from '@material-ui/core/FormLabel';
import Checkbox from '@material-ui/core/Checkbox';
import { MuiThemeProvider, createMuiTheme } from '@material-ui/core/styles';
import dataStyles from '../../../../styles.css';
function TabContainer(props) {
return (
<Typography component="div" style={{ padding: 8 * 3 }}>
{props.children}
</Typography>
);
}
const radioValues = [
{
label: 'Select All Providers for This Category',
value: 'PRO',
},
];
class SportsExpansion extends Component {
state = {
value: 0,
spHeight: [],
spLength: '',
};
componentDidMount() {
this.setState({ spHeight: this.props.spHeight });
if (
this.props.spHeight.filter(
check => check.spWeight === 'One'
).length > 0
) {
this.setState({ value: 0 });
} else if (
this.props.spHeight.filter(
check => check.spWeight === 'Two'
).length > 0
) {
this.setState({ value: 1 });
}
}
handleChange = (event, value) => {
console.log('handleChange -value', value);
this.setState({ value });
};
handleSportsRadioValueChange = (category, value) => {
console.log('handleSportsRadioValueChange -category', category);
console.log('handleSportsRadioValueChange -value', value);
this.setState({ spLength: value });
};
render() {
const { classes, data } = this.props;
let udVal = '';
let starVal = '';
udVal = data.udVals ? data.udVals[0].number : '';
starVal = data.starVals ? data.starVals[0].number : '';
const { canEdit, value } = this.state;
const { spHeight } = this.state;
return (
<div>
<AppBar
className={classes.benchmarkTabHeader}
position="static"
color="default"
>
<Tabs
onChange={this.handleChange}
variant="scrollable"
scrollButtons="on"
indicatorColor="primary"
textColor="primary"
style={{ display: 'block' }}
classes={{
indicator: classes.tabsIndicator,
scrollButtons: classes.MuiPrivateTabScrollButton,
}}
>
<Tab
style={{
display:
this.state.spHeight.filter(
check =>
check.spWeight === 'One'
).length === 0
? 'none'
: '',
color: value == 0 ? '#1976D2' : '#66696C',
}}
label={`Groups (${
this.state.spHeight.filter(
check =>
check.spWeight === 'One'
).length
})`}
icon={
<FontAwesomeIcon style={{ display: 'block' }} />
}
classes={{
root: classes.tabRoot,
selected: classes.tabSelected,
wrapper: classes.alignment,
}}
/>
<Tab
style={{
display:
this.state.spHeight.filter(
check =>
check.spWeight ===
'Two'
).length === 0
? 'none'
: '',
color: value == 1 ? '#1976D2' : '#66696C',
}}
label={`Two (${
this.state.spHeight.filter(
check =>
check.spWeight ===
'Two'
).length
})`}
icon={
<FontAwesomeIcon style={{ display: 'block' }} />
}
classes={{
root: classes.tabRoot,
selected: classes.tabSelected,
wrapper: classes.alignment,
}}
/>
</Tabs>
</AppBar>
{value === 0 && (
<TabContainer>
<div>
{' '}
<FormControl
component="fieldset"
className={classes.formControl}
>
<FormLabel component="legend" />
<RadioGroup
aria-label="Gender"
name="gender1"
className={classes.one}
value={this.state.spLength}
onChange={e => {
this.setState({
spLength: e.target.value,
});
}}
>
{this.state.spHeight
.filter(
check =>
check.spWeight ===
'One'
)
.map((radio, radioIndex) => {
return (
<FormControlLabel
key={radioIndex}
value={radio.value}
control={<Radio />}
label={radio.label}
classes={{
label:
classes.checkboxLabel,
}}
/>
);
})}
)}
</RadioGroup>
</FormControl>
<div className="tiger-button-container">
<Button
variant="outlined"
color="primary"
size="small"
className="tiger-button-upload"
>
ghsd jkjkjk
</Button>
</div>
<Drawer
style={{ width: 500 }}
anchor="right"
open={this.state.right}
>
<div tabIndex={0} role="button"></div>
</Drawer>
</div>
</TabContainer>
)}
{value === 1 && (
<TabContainer>
<div>
<div>
<FormControl
component="fieldset"
className={classes.formControl}
>
<RadioGroup
aria-label="Gender"
name="gender1"
className={classes.one}
value={this.state.spLength}
onChange={e => {
this.setState({
spLength:
e.target.value,
});
}}
>
{this.state.spHeight
.filter(
check =>
check.spWeight ===
'Two'
)
.map((radio, radioIndex) => {
return (
<FormControlLabel
key={radioIndex}
value={radio.label}
control={<Radio />}
label={radio.label}
classes={{
label:
classes.checkboxLabel,
}}
/>
);
})}
</RadioGroup>
</FormControl>
<div className="tiger-button-container">
<Button
variant="outlined"
color="primary"
size="small"
className="tiger-button-upload"
>
ghsd jkjkjk
</Button>
</div>
</div>
</div>
</TabContainer>
)}
</div>
);
}
}
export default withStyles(styles)(SportsExpansion);
////////////////////////////////////////////// //// 功能组件代码
import React, { Fragment, useState, useEffect, Component } from 'react';
import styles from './styles';
import { withStyles } from '@material-ui/core/styles';
import classnames from 'classnames';
import ExpandMoreIcon from '@material-ui/icons/ExpandMore';
import IconButton from '@material-ui/core/IconButton';
import Button from '@material-ui/core/Button';
import ExpansionPanel from '@material-ui/core/ExpansionPanel';
import ExpansionPanelSummary from '@material-ui/core/ExpansionPanelSummary';
import ExpansionPanelDetails from '@material-ui/core/ExpansionPanelDetails';
import Typography from '@material-ui/core/Typography';
import Drawer from '@material-ui/core/Drawer';
import AppBar from '@material-ui/core/AppBar';
import Tabs from '@material-ui/core/Tabs';
import Tab from '@material-ui/core/Tab';
import { FontAwesomeIcon } from '@fortawesome/react-fontawesome';
import Radio from '@material-ui/core/Radio';
import RadioGroup from '@material-ui/core/RadioGroup';
import FormControlLabel from '@material-ui/core/FormControlLabel';
import FormControl from '@material-ui/core/FormControl';
import FormLabel from '@material-ui/core/FormLabel';
import Checkbox from '@material-ui/core/Checkbox';
import { MuiThemeProvider, createMuiTheme } from '@material-ui/core/styles';
import dataStyles from '../../../../styles.css';
function TabContainer(props) {
return (
<Typography component="div" style={{ padding: 8 * 3 }}>
{props.children}
</Typography>
);
}
const radioValues = [
{
label: 'Select All Providers for This Category',
value: 'PRO',
},
];
//class SportsExpansion extends Component {
const SportsExpansion = (props) => {
const [value, setValue] = useState(0);
const [spHeight, setspHeight] = useState([]);
const [spLength, setspLength] = useState('');
// const { classes, data } = this.props;
const { classes, data } = props;
let udVal = '';
let starVal = '';
udVal = data.udVals ? data.udVals[0].number : '';
starVal = data.starVals ? data.starVals[0].number : '';
// const { canEdit, value } = this.state;
// const { spHeight } = this.state;
useEffect(() => {
// code to run on component mount
console.log("useEffect setspHeight--->", setspHeight);
//this.setState({ spHeight: this.props.spHeight });
setspHeight(spHeight);
if (
spHeight.filter(
check => check.spWeight === 'One'
).length > 0
) {
useState({ value: 0 });
} else if (
spHeight.filter(
check => check.spWeight === 'Two'
).length > 0
) {
useState({ value: 1 });
}
}, [])
//handleChange = (event, value) => {
const handleChange = (event, value) => {
console.log('handleChange -value', value);
useState({ value });
};
// handleSportsRadioValueChange = (category, value) => {
const handleSportsRadioValueChange = (category, value) => {
console.log('handleSportsRadioValueChange -category', category);
console.log('handleSportsRadioValueChange -value', value);
useState({ spLength: value });
};
return (
<div>
<AppBar
className={classes.benchmarkTabHeader}
position="static"
color="default"
>
<Tabs
onChange={this.handleChange}
variant="scrollable"
scrollButtons="on"
indicatorColor="primary"
textColor="primary"
style={{ display: 'block' }}
classes={{
indicator: classes.tabsIndicator,
scrollButtons: classes.MuiPrivateTabScrollButton,
}}
>
<Tab
style={{
display:
//this.state.spHeight.filter(
spHeight.filter(
check =>
check.spWeight === 'One'
).length === 0
? 'none'
: '',
color: value == 0 ? '#1976D2' : '#66696C',
}}
label={`Groups (${
//this.state.spHeight.filter(
spHeight.filter(
check =>
check.spWeight === 'One'
).length
})`}
icon={
<FontAwesomeIcon style={{ display: 'block' }} />
}
classes={{
root: classes.tabRoot,
selected: classes.tabSelected,
wrapper: classes.alignment,
}}
/>
<Tab
style={{
display:
//this.state.spHeight.filter(
spHeight.filter(
check =>
check.spWeight ===
'Two'
).length === 0
? 'none'
: '',
color: value == 1 ? '#1976D2' : '#66696C',
}}
label={`Two (${
//this.state.spHeight.filter(
spHeight.filter(
check =>
check.spWeight ===
'Two'
).length
})`}
icon={
<FontAwesomeIcon style={{ display: 'block' }} />
}
classes={{
root: classes.tabRoot,
selected: classes.tabSelected,
wrapper: classes.alignment,
}}
/>
</Tabs>
</AppBar>
{value === 0 && (
<TabContainer>
<div>
{' '}
<FormControl
component="fieldset"
className={classes.formControl}
>
<FormLabel component="legend" />
<RadioGroup
aria-label="Gender"
name="gender1"
className={classes.one}
value={//this.state.spLength
spLength}
onChange={e => {
useState({
spLength: e.target.value,
});
}}
>
{//this.state.spHeight
spHeight
.filter(
check =>
check.spWeight ===
'One'
)
.map((radio, radioIndex) => {
return (
<FormControlLabel
key={radioIndex}
value={radio.value}
control={<Radio />}
label={radio.label}
classes={{
label:
classes.checkboxLabel,
}}
/>
);
})}
)}
</RadioGroup>
</FormControl>
<div className="tiger-button-container">
<Button
variant="outlined"
color="primary"
size="small"
className="tiger-button-upload"
>
ghsd jkjkjk
</Button>
</div>
{/*<Drawer
style={{ width: 500 }}
anchor="right"
open={
//this.state.right
right}
>
<div tabIndex={0} role="button"></div>
</Drawer>*/}
</div>
</TabContainer>
)}
{value === 1 && (
<TabContainer>
<div>
<div>
<FormControl
component="fieldset"
className={classes.formControl}
>
<RadioGroup
aria-label="Gender"
name="gender1"
className={classes.one}
value={//this.state.spLength
spLength}
onChange={e => {
useState({
spLength:
e.target.value,
});
}}
>
{//this.state.spHeight
spHeight
.filter(
check =>
check.spWeight ===
'Two'
)
.map((radio, radioIndex) => {
return (
<FormControlLabel
key={radioIndex}
value={radio.label}
control={<Radio />}
label={radio.label}
classes={{
label:
classes.checkboxLabel,
}}
/>
);
})}
</RadioGroup>
</FormControl>
<div className="tiger-button-container">
<Button
variant="outlined"
color="primary"
size="small"
className="tiger-button-upload"
>
ghsd jkjkjk
</Button>
</div>
</div>
</div>
</TabContainer>
)}
</div>
);
}
export default withStyles(styles)(SportsExpansion);
答案 0 :(得分：0)
您必须将调用useState({ value: 1 });的位置替换为setValue(value)
答案 1 :(得分：0)
您使用useState错误。 useState替换状态对象。数组中的第一个值是您可以在组件中调用的值。数组中的第二个值替换import requests
r = requests.get('https://production.api.coindesk.com/v1/currency/ticker?currencies=BTC').json()
print(r)
price = r['data']['currency']['BTC']['quotes']['USD']['price']
print(price)
r = requests.get('https://production.api.coindesk.com/v1/currency/ticker?currencies=ADA,BCH,BSV,BTC,BTG,DASH,DCR,DOGE,EOS,ETC,ETH,IOTA,LSK,LTC,NEO,QTUM,TRX,XEM,XLM,XMR,XRP,ZEC').json()
print(r)
并设置状态实例的值。因此，如果您具有以下条件，请使用useState挂钩：
this.setState您将在组件中使用const [value, setValue] = useState(0);
来引用此状态实例。然后，您将使用value设置此状态实例的值。因此，将setValue设置为2，您将执行value。