从React-Native应用程序中的另一个类访问静态变量？ [英] Access static variable from another class in React-Native app?

问题描述

在我的react-native应用程序中，我目前有一个User类，我在其中定义当前用户如下：

in my react-native app I currently have a User class in which I define a current user as below:

class User {
    static currentUser = null;

    //other relevant code here

    static getCurrentUser() {
        return currentUser;
    }
}

export default User;

在另一个类中，我试图访问此currentUser的设定值。我无法弄清楚如何正确调用此函数;我收到错误 User.getCurrentUser不是函数。我应该以不同的方式调用此函数吗？

In a different class, I am trying to access the set value of this currentUser. I cannot figure out how to correctly call this function; I am getting the error User.getCurrentUser is not a function. Should I be calling this function in a different way?

var User = require('./User');

getInitialState: function() {

    var user = User.getCurrentUser();

    return {
        user: user
    };


},

推荐答案

您正在混合 import / export 样式。您应该将导入更改为

You are mixing import / export styles. You should either change your import to

var User = require('./User').default

或

import User from './User'

或更改您的出口：

module.exports = User

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