无法打开文件"xxx"，因为没有这样的文件 [英] The file “xxx” couldn’t be opened because there is no such file

问题描述

我想打开一个.txt文件，并将内容另存为字符串.我试过了:

I would like to open a .txt file and save the content as a String. I tried this:

let path = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)[0].appendingPathComponent("xxx.txt")
var contentString = try String(contentsOfFile: path.absoluteString)
print(path)

打印结果:

file:///Users/Username/Documents/xxx.txt

但是我得到了错误:

The file "xxx.txt" couldn’t be opened because there is no such file

文件100％可用

注意:我使用的是Swift 4 for macOS

Notice: I working with swift 4 for macOS

推荐答案

您的 path 变量是 URL ，并且 path.absoluteString 返回URL的字符串表示形式(在您的情况下为字符串"file:///Users/Username/Documents/xxx.txt" )，而不是基础文件路径"/用户/用户名/文档/xxx.txt" .

Your path variable is an URL, and path.absoluteString returns a string representation of the URL (in your case the string "file:///Users/Username/Documents/xxx.txt"), not the underlying file path "/Users/Username/Documents/xxx.txt".

使用 path.path 是一种可能的解决方案:

Using path.path is a possible solution:

let path = ... // some URL
let contentString = try String(contentsOfFile: path.path)

，但是更好的方法是避免转换并使用基于URL的方法:

but the better method is to avoid the conversion and use the URL-based methods:

let path = ... // some URL
let contentString = try String(contentsOf: path)

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