在react native中使用文本输入按下按钮后，如何更改组件的状态？

constructor(props) {
  super(props);
  this.state = {
    inputValue: ''
  };
}

handleInputChange = (text) => {
  this.setState({ inputValue: text });
}

render() {
  return (
    <TextInput
      value={this.state.inputValue}
      onChangeText={this.handleInputChange}
    />
  );
}

handleButtonPress = () => {
  // 更新组件的状态
  this.setState({ inputValue: 'Button Pressed' });
}

import React, { Component } from 'react';
import { TextInput, Button, View } from 'react-native';

class MyComponent extends Component {
  constructor(props) {
    super(props);
    this.state = {
      inputValue: ''
    };
  }

  handleInputChange = (text) => {
    this.setState({ inputValue: text });
  }

  handleButtonPress = () => {
    this.setState({ inputValue: 'Button Pressed' });
  }

  render() {
    return (
      <View>
        <TextInput
          value={this.state.inputValue}
          onChangeText={this.handleInputChange}
        />
        <Button
          title="Press Me"
          onPress={this.handleButtonPress}
        />
      </View>
    );
  }
}

export default MyComponent;