我正在嘗試訪問傳遞給本機組件的道具，但該組件似乎未收到道具。傳遞 props(PastHires.js) 的組件：return (  <ScrollView style={styles.container}>    <Text style={styles.heading}>Past Hires</Text>      {        this.state.boards.filter(item => item.driverId === this.props.user.id && item.hireStatus === 'completed' ).map((item, i) => (          <ListItem            style={styles.listItem}            key={i}            title={item.pickupDatetime + '  ' + item.hireType.toUpperCase() + '  ' + item.pickupLocation.toUpperCase()}            leftIcon={{name: 'book', type: 'font-awesome'}}            onPress={() => {              this.props.navigation.navigate('PastHireDetails', {                hireId: 12,              });            }}          />        ))      }  </ScrollView>);}接收道具的組件（PastHireDetails.js）：componentDidMount() {const { navigation } = this.props;// console.log(navigation.state)const ref = Firebase.firestore().collection('hires').doc(JSON.parse(navigation.getParam('hireId')));ref.get().then((doc) => {  if (doc.exists) {    this.setState({      hire: doc.data(),      key: doc.id,      isLoading: false    });  } else {    console.log("No such document!");  }});}這會引發(fā)語法錯誤：JSON Parse Error: Unexpected identifier "undefined" When I console log navigation.state 它返回該參數(shù)未定義Object {  "key": "PastHireDetails",  "params": undefined,  "routeName": "PastHireDetails",}我在這里做錯了什么嗎？任何修復(fù)？