解析，获取和显示当前用户 [英] Parse, Fetch and Display Current User

问题描述

我正在尝试获取当前用户的用户名，并将其显示在屏幕上，这是我的代码:

I'm attempting to fetch the currentuser's username, and have it displayed on screen, here is my code:

Parse.User.logIn(username, password, {
  success: function(user) {
    var currentUser = Parse.User.current(); 
    currentUser.fetch().then(function(fetchedUser) {
      var name = fetchedUser.getUsername();
    });
    $('.alertmsg').html('<div id="alert"><p>You are' + name + '</div>');
  }
});

一切正常，但不会显示用户名.

Everything is working fine, but the username won't display.

希望这是一个简单的解决方法！

Hope that this is an easy fix!

推荐答案

您应该在回调中移动更新alertmsg的html的行，这是因为name的作用域是回调函数，并且在它之外不存在:

You should move the line at which you update the html of alertmsg in the callback, that is because name is scoped to the callback function and does not exist outside of it:

Parse.User.logIn(username, password, {
  success: function(user) {
    var currentUser = Parse.User.current(); 
    currentUser.fetch().then(function(fetchedUser) {
      var name = fetchedUser.getUsername();
      $('.alertmsg').html('<div id="alert"><p>You are' + name + '</div>');
    });
  }
});

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