从函数调用时从Cordova文件插件返回值

本文介绍了从函数调用时从Cordova文件插件返回值的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我已经看到有人发布了类似的问题，但它确实不符合我的需求:

I have seen someone has posted a similar question but it doesn't really fit what I'am looking for:

这是我的代码:

$(document).ready(function(){ $("#btnTest").bind("click", function(){ a = createFile(); alert(">> "+a); // Displayed returned value; }); function createFile(){ var type = window.TEMPORARY; var size = 5*1024*1024; window.requestFileSystem(type, size, successCallback, errorCallback) function successCallback(fs) { fs.root.getFile('log.txt', {create: true, exclusive: true}, function(fileEntry) { alert('File creation successfull!'); return 1; // Return value; }, errorCallback); } function errorCallback(error) { alert("ERROR: " + error.code) return 2; // Return value; } } });

基本上，一旦调用createFile()函数，它将返回1(成功)或2(错误).问题是我不知道如何返回该值并正确调用它?

Basically once the createFile() function is called it will return either 1 (success) or 2 (error). Problem is I do not know how I can return the value and call it properly?

任何帮助都是非常好的.

Any help would be really good.

推荐答案

我会在您的函数中创建一个名为 returnValue 的全局变量并设置其值

I would create a global variable in your function called returnValue and set its value

$(document).ready(function(){ $("#btnTest").bind("click", function(){ a = createFile(); alert(">> "+a); // Displayed returned value; }); function createFile(){ var returnValue; var type = window.TEMPORARY; var size = 5*1024*1024; window.requestFileSystem(type, size, successCallback, errorCallback) function successCallback(fs) { fs.root.getFile('log.txt', {create: true, exclusive: true}, function(fileEntry) { alert('File creation successfull!'); returnValue = 1; // Return value; }, errorCallback); } function errorCallback(error) { alert("ERROR: " + error.code) returnValue = 2; // Return value; } return returnValue; } });