在react native中按下按钮时切换文本

constructor(props) {
  super(props);
  this.state = {
    buttonText: '点击切换文本',
  };
}

render() {
  return (
    <View>
      <Button onPress={this.toggleText} title={this.state.buttonText} />
      <Text>{this.state.buttonText}</Text>
    </View>
  );
}

toggleText = () => {
  if (this.state.buttonText === '点击切换文本') {
    this.setState({ buttonText: '文本已切换' });
  } else {
    this.setState({ buttonText: '点击切换文本' });
  }
}

constructor(props) {
  super(props);
  this.state = {
    buttonText: '点击切换文本',
  };
  this.toggleText = this.toggleText.bind(this);
}