Phonegap - 首次加载时创建.txt文件 [英] Phonegap - Creating a .txt file on first load

问题描述

我正在创建一个phonegap应用程序，并需要在第一次加载时创建一个新的.txt文件。在这之后，我需要检查文件是否存在，然后忽略创建，如果是这样，下面是一般的流程，我之后：

1 - onDeviceReady - 加载phoengap应用程序
2 - 检查是readme.txt存在（如果是加载主页）
3 - 创建文件readme.txt并添加到www文件夹
4 - 继续加载首页

EDIT - 而不是下面提到的有效答案，我决定使用HTML5s本地存储，因为这只是一行代码。

  localStorage.setItem（name，Email Supplied！）; 
  

，可以使用这个简单的if语句检查

  if（localStorage.getItem（name）==Email Supplied！）
 {
 //你想在这里发生什么
} 
  

解决方案

这里：

http://docs.phonegap.com/en/1.4.1/phonegap_file_file.md.html#FileWriter

此行创建文件if它不存在：

  fileSystem.root.getFile（readme.txt，{create：true，exclusive：false }，gotFileEntry，fail）; 
 





支持的平台

Android BlackBerry WebWorks（OS 5.0及更高版本）iOS Windows Phone 7（
Mango）

我不知道有其他人，但在iOS中，文档是在/ var / mobile / Application / YOU_APP / Documents中创建的

[CODE]

 < script type =text / javascriptcharset =utf-8> 
 
 //等待PhoneGap加载
 // 
 document.addEventListener（deviceready，onDeviceReady，false）; 
 
 // PhoneGap就绪
 // 
 function onDeviceReady（）{
 window.requestFileSystem（LocalFileSystem.PERSISTENT，0，gotFS，fail）; 
} 
 
 function gotFS（fileSystem）{
 fileSystem.root.getFile（readme.txt，{create：true}，gotFileEntry，fail）; 
} 
 
 function gotFileEntry（fileEntry）{
 fileEntry.createWriter（gotFileWriter，fail）; 
} 
 
函数gotFileWriter（writer）{
 writer.onwrite = function（evt）{
 console.log（write success）; 
}; 
 
 writer.write（some sample text）; 
 writer.abort（）; 
 //文件的内容现在'一些不同的文本'
} 
 
函数失败（错误）{
 console.log（error：+ error.code ）; 
} 
 
< / script> 
  

希望它有帮助

I am creating a phonegap app and need to create a new .txt file on first load. After this I need to check whether the file exists and then ignore the creation if that is the case, below is the general flow that I am after:

1 - onDeviceReady - loading phoengap app 2 - Check is readme.txt exist (if yes load home page) 3 - Create a file readme.txt and add to www folder 4 - Continue loading homepage

EDIT - Rather than the valid answer mentioned below I decided to use HTML5s local storage as this was simply 1 line of code.

localStorage.setItem("name", "Email Supplied!");

and can be checked using this simple if statement

 if (localStorage.getItem("name") == "Email Supplied!")
        {
            // What you want to happen here
        }

解决方案

You can take a look at the full example here:

http://docs.phonegap.com/en/1.4.1/phonegap_file_file.md.html#FileWriter

This line create the file if it doesn't exist :

fileSystem.root.getFile("readme.txt", {create: true, exclusive: false}, gotFileEntry, fail);

Supported Platforms

Android BlackBerry WebWorks (OS 5.0 and higher) iOS Windows Phone 7 ( Mango )

I don't know about there others but in iOS, the document is created in /var/mobile/Application/YOU_APP/Documents

[CODE]

        <script type="text/javascript" charset="utf-8">

            // Wait for PhoneGap to load
            //
            document.addEventListener("deviceready", onDeviceReady, false);

            // PhoneGap is ready
            //
            function onDeviceReady() {
                window.requestFileSystem(LocalFileSystem.PERSISTENT, 0, gotFS, fail);
            }

            function gotFS(fileSystem) {
                fileSystem.root.getFile("readme.txt", {create: true}, gotFileEntry, fail);
            }

            function gotFileEntry(fileEntry) {
                fileEntry.createWriter(gotFileWriter, fail);
            }

            function gotFileWriter(writer) {
                writer.onwrite = function(evt) {
                    console.log("write success");
                };

                writer.write("some sample text");
                writer.abort();
                // contents of file now 'some different text'
            }

            function fail(error) {
                console.log("error : "+error.code);
            }

        </script>

Hope it helps

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