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如何添加和使用Cordova插件(How to add and work with Cordova plugins)

 我如何在我的Cordova应用程序中添加插件？ 我找不到任何例子。 我正在尝试在nodejs提示符下安装和添加插件： npm i PLUGIN_NAME和cordova plugin add PLUGIN_NAME 。 之后，我正在尝试在标签<script></script> index.html文件中为此插件编写代码，并且我在控制台中有很多错误： Uncaught ReferenceError: cordova is not defined(…)或另一个。 我读过许多关于这个的文档，我知道我需要将任何有关插件的记录添加到config.xml文件中。 但我怎么能做到这一点？ 你能帮我解决这个问题吗？ 

How I can add plugins in my Cordova app? I can't find any examples. I'm trying to install and add plugins in nodejs prompt: npm i PLUGIN_NAME and cordova plugin add PLUGIN_NAME. After that, I'm trying to write a code for this plugin in my index.html file in tag <script></script> and I have many errors in console like that: Uncaught ReferenceError: cordova is not defined(…) or another. I did read many documentation about that and I know that I need to add any records about plugins to config.xml file. But how I can do it? Can you help me with this trouble?

原文：https://stackoverflow.com/questions/40647460

更新时间：2022-04-22 13:04

最满意答案

 Node.js是事件驱动的，这意味着大部分函数是异步的。 execute函数不会返回任何值，因为“返回”值位于声明为第一个参数的匿名函数中，只有在查询已执行并且数据库已返回值时才会调用该函数。 所以你的result变量不包含任何值，因为没有任何东西可以返回。  
 ** 编辑 **  
 即使在编辑之后，记录变量result rows也会在向其分配rows 之前执行，因为匿名函数仅在稍后执行，即查询完成时。 

Node.js is event driven, meaning that most of the functions are asynchronous. The execute function does not return any value, because the "returned" value is in the anonymous function declared as your first argument, which function will be called only when the query has been executed and a value has been returned by the database. So your result variable does not contain any value, because there's nothing to return yet. 
** EDIT ** 
Even after your edit, the line where you log the variable result is executed before you assign rows to it, because the anonymous function is only executed later, when the query is completed.

如何添加和使用Cordova插件(How to add and work with Cordova plugins)

最满意答案

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