javascript-如何解构{this.props.children}?
作者:互联网
我想为我的移动应用添加背景,但是当我使用“ this.props.children”时
埃斯林特说我“必须使用破坏性道具分配”.为什么我可以破坏这个道具?
这是我的代码,
export default class WallPaper extends Component {
render() {
return (
<ImageBackground
source={backgroundimg}
imageStyle={{ opacity: 0.9 }}
style={styles.container}
>
{this.props.children}
</ImageBackground>
);
}
}
当我使用此代码
export default class WallPaper extends Component {
render() {
const { children } = this.props;
return (
<ImageBackground
source={backgroundimg}
imageStyle={{ opacity: 0.9 }}
style={styles.container}
>
{children}
</ImageBackground>
);
}
}
当我使用此代码时,
export default class WallPaper extends Component {
render() {
(this.props) => {
return (
<ImageBackground
source={backgroundimg}
imageStyle={{ opacity: 0.9 }}
style={styles.container}
>
{props.children}
</ImageBackground>
);
}
}
}
预先感谢您的帮助 !
解决方法:
您可以尝试以下操作以从this.props中破坏子级:
export default class WallPaper extends Component {
render() {
const { children } = this.props;
return (
<ImageBackground
source={backgroundimg}
imageStyle={{ opacity: 0.9 }}
style={styles.container}
>
{children}
</ImageBackground>
);
}
}
看起来您的项目可能需要此组件的propTypes.尝试以下操作添加子道具类型.注意,您将需要安装软件包prop-types:
// ...
import PropTypes from 'prop-types';
class WallPaper extends Component {
render() {
const { children } = this.props;
return (
<ImageBackground
source={backgroundimg}
imageStyle={{ opacity: 0.9 }}
style={styles.container}
>
{children}
</ImageBackground>
);
}
}
WallPaper.propTypes = {
children: PropTypes.node // or PropTypes.node.isRequired to make it required
};
export default WallPaper;
希望有帮助!
标签:destructuring,reactjs,node-js,react-native,javascript 来源: https://codeday.me/bug/20191108/2007248.html