如何在不使用React Native中的’this’关键字的情况下访问元素的属性？我有一个函数,父类本身绑定为’this’但我想访问被单击的元素的属性.这是代码 –
import {Circle} from 'react-native-svg';
export default App extends Component {
constructor(props) {
super(props);
this.state = {activeX: null}
}
handleTouch(event) {
const x = event.target.cx; //How to access "cx" property here?
this.setState({ activeX: x });
}
render() {
return (
<Circle cx='10' cy='10' r='5' onPress={this.handleTouch.bind(this)}/>
<Circle cx='20' cy='20' r='5' onPress={this.handleTouch.bind(this)}/>
);
}
}
尝试这个
import {Circle} from 'react-native-svg';
export default App extends Component {
constructor(props) {
super(props);
this.state = {
activeX: null,cx: 10
}
}
handleTouch = () => {
const x = this.state.cx
this.setState({ activeX: x });
}
render() {
return (
<Circle cx={this.state.cx} cy='10' r='5' onPress={this.handleTouch}/>
);
}
}
