PropTypes已被廢棄，該如何解決呢

Question

我正在錯誤

未定義不是對象（計算「_react2.PropTypes.string」）

在谷歌上搜索，我發現，React.Proptypes已被棄用，並且是獨立的。

但是，我該如何解決這個問題？

我嘗試以下：

1）npm install -g prop-types --save

2.）部分從代碼

import React, { Component } from 'react'; 
import PropTypes from 'prop-types'; 
import { Text, View, TouchableOpacity } from 'react-native'; 
import { Actions } from 'react-native-router-flux'; 
import { Field, reduxForm } from 'redux-form'; 
import { Container, Input, Button, Item, Spinner } from '../common'; 
import styles from './authStyle'; 

const propTypes = { 
    handleSubmit: PropTypes.func.isRequired, 
    clearState: PropTypes.func.isRequired, 
    signUpUser: PropTypes.func.isRequired, 
    authError: PropTypes.string.isRequired, 
    loading: PropTypes.bool.isRequired, 
}; 

class Signup extends Component { 
    constructor(props) { 
    super(props); 

    this.handleFormSubmit = this.handleFormSubmit.bind(this); 
    } 
... 

然而，我最終具有相同的錯誤和如何解決其？

UPDATE

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

const propTypes = { 
    children: PropTypes.node.isRequired, 
    onPress: PropTypes.func.isRequired, 
    buttonStyle: PropTypes.object, 
    textStyle: PropTypes.object, 
}; 

const defaultProps = { 
    buttonStyle: {}, 
    textStyle: {}, 
}; 

function Button({ onPress, children, buttonStyle, textStyle }) { 
    const { button, text } = styles; 

    return (
    <TouchableOpacity 
     onPress={onPress} 
     style={[button, buttonStyle]} 
    > 
     <Text style={[text, textStyle]}> 
     {children} 
     </Text> 
    </TouchableOpacity> 
); 
} 

const styles = { 
    button: { 
    flex: 1, 
    alignSelf: 'stretch', 
    backgroundColor: '#039be5', 
    borderRadius: 3, 
    marginTop: 10, 
    }, 
    text: { 
    alignSelf: 'center', 
    color: '#fff', 
    fontSize: 16, 
    fontWeight: '600', 
    paddingTop: 10, 
    paddingBottom: 10, 
    }, 
}; 

Button.defaultProps = defaultProps; 
Button.propTypes = propTypes; 

export { Button }; 

Answer 1

用這個代替

import PropTypes from 'prop-types'; 

Button.propTypes = { 
    type: PropTypes.string 
};