如何在react-native中显示文本组件上模式的选定值

import React, { Component } from 'react';
import { Text, View, Picker } from 'react-native';

class App extends Component {
  constructor(props) {
    super(props);
    this.state = {
      selectedMode: '模式1', // 初始化选定值
    };
  }

  render() {
    return (
      <View>
        <Text>当前选定的模式：{this.state.selectedMode}</Text>
        <Picker
          selectedValue={this.state.selectedMode}
          onValueChange={(itemValue) => this.setState({ selectedMode: itemValue })}
        >
          <Picker.Item label="模式1" value="模式1" />
          <Picker.Item label="模式2" value="模式2" />
          <Picker.Item label="模式3" value="模式3" />
        </Picker>
      </View>
    );
  }
}

export default App;