未定义不是对象（评估'items.reduce）

Question

这是我的代码：

Voice.onSpeechStart = this.onSpeechStart.bind(this);
Voice.onSpeechRecognized = this.onSpeechRecognized.bind(this);
Voice.onSpeechResults = this.onSpeechResults.bind(this);}

componentWillUnmount() {
    Voice.destroy().then(Voice.removeAllListeners);}

  onSpeechStart(e) {
    this.setState({
      started: "√"}
);}

  onSpeechRecognized(e) {
    this.setState({
      recognized: "√"
    });
  }

  onSpeechResults(e) {
   this.setState({results: e.value});

   if(matchSorter(this.setState.results,'login now') === 'login now'){
        this.props.navigation.navigate("Dashboard");
   }
   else {
        ToastAndroid.show("Please Try Again", ToastAndroid.SHORT);
   }
  }

async _startRecognition(e) {
this.setState({
  recognized: "",
  started: "",
  results: []
});
try {
  await Voice.start("en-US");
} catch (e) {
  console.error(e);
}


 render() {
    return (
    <Text>Say "Login now"</Text>

    <TouchableOpacity
      onPress={this._startRecognition.bind(this)}>
    <Text> TAP HERE </Text>}

出现此错误：

基于Android的移动设备的错误图片：

*当我说现在登录时，“ this.setState.results ”的输出为“ 现在登录博客现在登录现在登录现在正在跑步现在登录”。

Answer 1

当您尝试从状态中检索值时，您必须编写如下代码： this.state.VARIBLENAME 。您输入的this.setState.VARIBLENAME错误。

从您的代码中更正：

   if(matchSorter(this.state.results,'login now') === 'login now'){
        this.props.navigation.navigate("Dashboard");
   }

您的整个代码：

Voice.onSpeechStart = this.onSpeechStart.bind(this);
Voice.onSpeechRecognized = this.onSpeechRecognized.bind(this);
Voice.onSpeechResults = this.onSpeechResults.bind(this);}

componentWillUnmount() {
    Voice.destroy().then(Voice.removeAllListeners);}

  onSpeechStart(e) {
    this.setState({
      started: "√"}
);}

  onSpeechRecognized(e) {
    this.setState({
      recognized: "√"
    });
  }

  onSpeechResults(e) {
   this.setState({results: e.value});

   if(matchSorter(this.state.results,'login now') === 'login now'){
        this.props.navigation.navigate("Dashboard");
   }
   else {
        ToastAndroid.show("Please Try Again", ToastAndroid.SHORT);
   }
  }

async _startRecognition(e) {
this.setState({
  recognized: "",
  started: "",
  results: []
});
try {
  await Voice.start("en-US");
} catch (e) {
  console.error(e);
}


 render() {
    return (
    <Text>Say "Login now"</Text>

    <TouchableOpacity
      onPress={this._startRecognition.bind(this)}>
    <Text> TAP HERE </Text>
}

您可以替换代码，它会为您工作。