如何通过谷歌脚本更新谷歌驱动器文本文件？

Question

我想将Google脚本变量数据作为文本文件存入Google驱动器，并通过Google脚本更新该文本文件规则！

下面的代码创建一个文本文件并将数据写入它。我想知道我以后如何更新文本文件？如果该文件是存在

function createTextFile() 
{ 

    name="testFile.txt"; 
    name2="testFolder"; 

    var content = "this is text data to be written in text file"; 

var dir = DriveApp.getFoldersByName(name2).next() 
var file = dir.createFile(name, content); 
} 

Answer 1

更新覆盖的内容。

function saveData(folder, fileName, contents) { 
    var filename = "testFile.txt"; 

    var children = folder.getFilesByName(filename); 
    var file = null; 
    if (children.hasNext()) { 
    file = children.next(); 
    file.setContent(contents); 
    } else { 
    file = folder.createFile(filename, contents); 
    } 
} 

function test() { 
    var folders = DriveApp.getFoldersByName("testFolder"); 
    if (folders.hasNext()) { 
    var folder = folders.next(); 
    saveData(folder, "testfile.txt", "HelloWorld"); 
    saveData(folder, "testfile.txt", "Welcome"); 
    } 

}