React Native (Expo)：TouchableOpacity onPress 不是函数/未定义

如何解决React Native (Expo)：TouchableOpacity onPress 不是函数/未定义

我一直在学习 Linkedin-Learning 上的这个教程，但突然发现我的代码无法运行了。 不幸的是，我不太明白这些错误信息：

这个警告总是出现：

警告：道具类型失败：道具 onPress 被标记为必需 RandomNumber，但其值为 undefined。

如果我按下其中一个“按钮”，则会出现以下错误消息：

类型错误：_this.props.onPress 不是函数。 （在 '_this.props.onPress(_this.props.id)','_this.props.onPress' 是 未定义）

RandomNumber.js：

import React from "react";
import { Text,TouchableOpacity,StyleSheet } from "react-native";
import PropTypes from "prop-types";

class RandomNumber extends React.Component {
  static propTypes = {
    id: PropTypes.number.isrequired,number: PropTypes.number.isrequired,isdisabled: PropTypes.bool.isrequired,onPress: PropTypes.func.isrequired,};

  handlePress = () => {
    if (this.props.isdisabled) {
      return;
    }
    this.props.onPress(this.props.id);
  };

  render() {
    return (
      <TouchableOpacity onPress={this.handlePress}>
        <Text style={[styles.random,this.props.isdisabled && styles.disabled]}>
          {this.props.number}
        </Text>
      </TouchableOpacity>
    );
  }
}

const styles = StyleSheet.create({
  random: {
    backgroundColor: "#999",width: 120,marginHorizontal: 15,marginVertical: 25,fontSize: 35,textAlign: "center",},disabled: {
    opacity: 0.2,});
export default RandomNumber;

Game.js：

import React from "react";
import { View,Text,Button,StyleSheet } from "react-native";
import PropTypes from "prop-types";
import RandomNumber from "./RandomNumber";
import shuffle from "lodash.shuffle";

class Game extends React.Component {
  static propTypes = {
    randomNumberCount: PropTypes.number.isrequired,initialSeconds: PropTypes.number.isrequired,onPlayAgain: PropTypes.func.isrequired,};

  state = { selectedIds: [],remainingSeconds: this.props.initialSeconds };

  gameStatus = "PLAYING";

  randomNumbers = Array.from({ length: this.props.randomNumberCount }).map(
    () => 1 + Math.floor(10 * Math.random())
  );

  target = this.randomNumbers
    .slice(0,this.props.randomNumberCount - 2)
    .reduce((acc,curr) => acc + curr,0);

  shuffledRandomNumbers = shuffle(this.randomNumbers);

  componentDidMount() {
    this.intervalID = setInterval(() => {
      this.setState(
        (prevstate) => {
          return { remainingSeconds: prevstate.remainingSeconds - 1 };
        },() => {
          if (this.state.remainingSeconds === 0) {
            clearInterval(this.intervalID);
          }
        }
      );
    },1000);
  }

  componentwillUnmount() {
    clearInterval(this.intervalID);
  }

  isNumberSelected = (numberIndex) => {
    return this.state.selectedIds.indexOf(numberIndex) >= 0;
  };

  selectNumber = (numberIndex) => {
    this.setState((prevstate) => ({
      selectedIds: [...prevstate.selectedIds,numberIndex],}));
  };

  UNSAFE_componentwillUpdate(nextProps,nextState) {
    if (
      nextState.selectedIds !== this.state.selectedIds ||
      nextState.remainingSeconds === 0
    ) {
      this.gameStatus = this.calcGameStatus(nextState);
      if (this.gameStatus !== "PLAYING") {
        clearInterval(this.intervalID);
      }
    }
  }

  calcGameStatus = (nextState) => {
    const sumSelected = nextState.selectedIds.reduce((acc,curr) => {
      return acc + this.shuffledRandomNumbers[curr];
    },0);
    if (this.state.remainingSeconds === 0) {
      return "LOST";
    }
    if (sumSelected < this.target) {
      return "PLAYING";
    }
    if (sumSelected === this.target) {
      return "WON";
    }
    if (sumSelected > this.target) {
      return "LOST";
    }
  };

  render() {
    const gameStatus = this.gameStatus;
    return (
      <View style={styles.container}>
        <Text style={[styles.target,styles[`STATUS_${gameStatus}`]]}>
          {this.target}
        </Text>
        <View style={styles.randomContainer}>
          {this.shuffledRandomNumbers.map((randomNumber,index) => (
            <RandomNumber
              key={index}
              id={index}
              number={randomNumber}
              onPress={this.state.selectNumber}
              isdisabled={
                this.isNumberSelected(index) || gameStatus !== "PLAYING"
              }
            />
          ))}
        </View>
        {this.gameStatus !== "PLAYING" && (
          <Button title="Play Again" onPress={this.props.onPlayAgain} />
        )}
        <Text>{this.state.remainingSeconds}</Text>
      </View>
    );
  }
}

const styles = StyleSheet.create({
  container: {
    backgroundColor: "#ddd",flex: 1,target: {
    fontSize: 40,backgroundColor: "#bbb",margin: 50,randomContainer: {
    flex: 1,flexDirection: "row",flexWrap: "wrap",justifyContent: "space-around",STATUS_PLAYING: {
    backgroundColor: "#bbb",STATUS_WON: {
    backgroundColor: "green",STATUS_LOST: {
    backgroundColor: "red",});

export default Game;

App.js：

import React from "react";
import Game from "./Game";

class App extends React.Component {
  state = { gameId: 1 };
  resetGame = () => {
    this.setState((prevstate) => {
      return { gameId: prevstate.gameId + 1 };
    });
  };
  render() {
    return (
      <Game
        key={this.state.gameId}
        onPlayAgain={this.resetGame}
        randomNumberCount={6}
        initialSeconds={10}
      />
    );
  }
}

export default App;

我已经尝试过其他帖子中的一些解决方案，但都没有奏效。

感谢任何帮助。