gra*_*unk 6 reusability reactjs react-props react-component
所以我有一个子组件,我想在父容器组件中渲染它的多个实例。向每个对象传递不同的道具,以便它们显示不同。
发生的情况是,它们都在渲染时将脚本中的最后一个道具实例读入两个实例中。因此,下面的两个组件都以 placeHolder==='Describe myself' 结尾,是否有解决方法,以便它们分别轮流注入它们的 props?
<ButtonMode
open={this.state.open}
handleClose={this.handleClose}
buttonName='Update'
modalOpen={this.modalOpen}
placeHolder="New picture url"
change={this.handlePicture}
label='URL'
/>
<ButtonMode
open={this.state.open}
handleClose={this.handleClose}
buttonName='Update'
modalOpen={this.modalOpen}
placeHolder='Describe yourself'
label='Bio'
change={this.handleBio}
/>
Run Code Online (Sandbox Code Playgroud)
按钮模式
class ButtonMode extends Component {
constructor(props){
super(props)
this.state = {
input:''
}
this.handleInput = this.handleInput.bind(this);
this.handle = this.handle.bind(this);
}
handleInput(val){
this.setState({input:val})
};
handle() {
this.props.change(this.state.input);
};
render(){
const { classes } = this.props;
return (
<div>
<Button
className={classes.button}
onClick={this.props.modalOpen}
>Update
</Button>
<Modal
aria-labelledby="simple-modal-title"
aria-describedby="simple-modal-description"
open={this.props.open}
onClose={this.props.handleClose}
>
<div className={classes.paper}>
<TextField
id="filled-textarea"
label={this.props.label}
placeholder={this.props.placeHolder}
multiline
className={classes.textField}
onChange={(e)=>{this.handleInput(e.target.value)}}
rows= '4'
/>
<Button
onClick={this.handle}
className={classes.button}
color="secondary">Submit</Button>
</div>
</Modal>
</div>
)
}
}
Run Code Online (Sandbox Code Playgroud)
然后我就这样用了
class UserCard extends Component {
constructor(props){
super(props);
this.state = {
tempPro:'',
open: false,
profilePicture:''
}
this.modalOpen = this.modalOpen.bind(this);
this.handleClose = this.handleClose.bind(this);
this.handlePicture = this.handlePicture.bind(this);
}
// componentDidMount(){
// const {userId, profilePic} = this.props;
// this.setState({profilePicture:profilePic});
// // axios.get(`/api/profile/${userId}`).then(res=>{
// // let {profilePic} = res.data[0];
// // this.setState({profilePic})
// // })
// }
handlePicture(val){
this.props.changePic(val);
this.setState({open:false});
};
handleBio(val){
this.setState({open:false});
};
handleClose(){
this.setState({open: false});
};
modalOpen(){
this.setState({open:true});
};
render() {
const { classes } = this.props;
const {stories} = this.props;
let storyShow = stories.map((story,id) => {
return(
<div value={story.story_id}>
<h3>{story.title}</h3>
<ul className={classes.background}>
<li>{story.description}</li>
<li>{story.is_complete}</li>
</ul>
</div>
)
});
return (
<div className={classes.rootD}>
<Grid container>
<Grid className={classes.itemFix} >
<Card className={classes.card}>
<CardMedia
className={classes.media}
image={this.props.proPic}
title={this.props.userName}
/>
<div>
<ButtonMode
open={this.state.open}
handleClose={this.handleClose}
modalOpen={this.modalOpen}
placeHolder="New picture url"
change={this.handlePicture}
label='URL'
/>
</div>
<CardHeader
className={classes.titles}
title={this.props.userName}
subheader="Somewhere"
/>
<CardHeader className={classes.titles} title='Bio' />
<CardContent className={classes.background}>
<Typography className={classes.bio} paragraph>
{this.props.bio}
</Typography>
</CardContent>
<div>
<ButtonMode
open={this.state.open}
handleClose={this.handleClose}
modalOpen={this.modalOpen}
placeHolder='Describe you how you want'
label='Bio'
change={this.handleBio}
/>
</div>
</Card>
</Grid>
<Grid className={classes.itemFixT}>
<Card className={classes.card}>
<CardContent>
<CardHeader
className={classes.titles}
title='Works'/>
<Typography paragraph>
<ul>
{storyShow}
</ul>
</Typography>
</CardContent>
</Card>
</Grid>
</Grid>
</div>
);
}
}
UserCard.propTypes = {
classes: PropTypes.object.isRequired,
};
function mapStateToProps(state){
const {userId, profilePic} = state;
return {
userId,
profilePic
}
}
export default connect(mapStateToProps,{})(withStyles(styles)(UserCard));
Run Code Online (Sandbox Code Playgroud)
小智 5
我遇到了类似的问题,我试图将不同的功能传递给子组件。我有一个 UploadFile 组件,其中包含来自 Material-ui 的 an<input/>和 a <Button/>,我想在整个页面中多次重用该组件,因为用户有多个文件要上传,并且为了保存文件,我需要回调函数主页。
我必须做的是,<UploadFile/>在我的情况下,为每个子组件提供<ButtonMode/>一个唯一的 id作为 prop 传入,否则,顶级页面无法区分对子组件的每个引用与其他任何引用。
子组件的代码:
function UploadFile({ value, handleFile }) {
const classes = useStyles();
return (
<>
<input
accept=".tsv,.fa,.fasta"
className={classes.input}
id={value}
type="file"
style={{ display: 'none' }}
onChange={e => handleFile(e.target.files[0])}
/>
<label htmlFor={value}>
<Button
variant="contained"
color='default'
component="span"
startIcon={<CloudUploadIcon />}
className={classes.button}>
Upload
</Button>
</label>
</>
);
}
Run Code Online (Sandbox Code Playgroud)
该组件在父组件中的用法(handleFile 是我传入的函数,在上面的父组件中定义):
<UploadFile value='prosite' handleFile={handlePrositeFile} />
<UploadFile value='pfam' handleFile={handlePfamFile} />
Run Code Online (Sandbox Code Playgroud)
| 归档时间: |
|
| 查看次数: |
8065 次 |
| 最近记录: |