如何在Click事件上获取React Native中的元素属性

如何在React Native中不使用'this'关键字的情况下访问元素的属性？我有一个将父类本身绑定为“ this”的函数，但我想访问被单击元素的属性。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)}/>
   );
 }
}