swift - 删除目录中的内容时出错 - Domain=NSCocoaErrorDomain Code=4 |域=NSPOSIXErrorDomain 代码=2 "No such file or directory"

Question

运行以下代码时出现以下错误，如何修复？我已经在 SO 中搜索过，但找不到 Swift 3 的任何内容。

// Delete all files in given directory
let path = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0] as String
let dataPath = NSURL(fileURLWithPath: path)
if let enumerator = FileManager.default.enumerator(atPath: dataPath.path!) {
    while let fileName = enumerator.nextObject() as? String {
        do {
            try FileManager.default.removeItem(atPath: "\(dataPath)\(fileName)")
        }
        catch let e as NSError {
            print(e)
        }
        catch {
            print("error")
        }
    }
}

日志:

Error Domain=NSCocoaErrorDomain Code=4 "“.DS_Store” couldn’t be removed." UserInfo={NSFilePath=file:///Users/CIPL0469/Library/Developer/CoreSimulator/Devices/F0106B28-C4D1-4FE2-A425-D04C6BFDDC01/data/Containers/Data/Application/A5AB9B7B-6174-4BA7-9EFD-0E9F1C98CB17/Documents/.DS_Store, NSUserStringVariant=( Remove ), NSUnderlyingError=0x60800004fed0 {Error Domain=NSPOSIXErrorDomain Code=2 "No such file or directory"}}

Error Domain=NSCocoaErrorDomain Code=4 "“2017-01-31_10-44-21.m4a” couldn’t be removed." UserInfo={NSFilePath=file:///Users/CIPL0469/Library/Developer/CoreSimulator/Devices/F0106B28-C4D1-4FE2-A425-D04C6BFDDC01/data/Containers/Data/Application/A5AB9B7B-6174-4BA7-9EFD-0E9F1C98CB17/Documents/2017-01-31_10-44-21.m4a, NSUserStringVariant=( Remove ), NSUnderlyingError=0x60800004fa80 {Error Domain=NSPOSIXErrorDomain Code=2 "No such file or directory"}}

Error Domain=NSCocoaErrorDomain Code=4 "“2017-01-31_10-44-26.m4a” couldn’t be removed." UserInfo={NSFilePath=file:///Users/CIPL0469/Library/Developer/CoreSimulator/Devices/F0106B28-C4D1-4FE2-A425-D04C6BFDDC01/data/Containers/Data/Application/A5AB9B7B-6174-4BA7-9EFD-0E9F1C98CB17/Documents/2017-01-31_10-44-26.m4a, NSUserStringVariant=( Remove ), NSUnderlyingError=0x60000004f570 {Error Domain=NSPOSIXErrorDomain Code=2 "No such file or directory"}}

Answer 1

(NS)DirectoryEnumerator 的

nextObject() 始终返回枚举项的完整路径/url，额外的串联会中断路径。除此之外，使用字符串插值连接 URL 和 String 以将其作为 path 参数传递的形式根本不起作用。

无论如何，我建议使用与 URL 相关的 API

let fileManager = FileManager.default
do {
    let url = try fileManager.url(for: .documentDirectory, in: .userDomainMask, appropriateFor: nil, create: false)
    if let enumerator = fileManager.enumerator(at: url, includingPropertiesForKeys: nil) {
        while let fileURL = enumerator.nextObject() as? URL {
            try fileManager.removeItem(at: fileURL)
        }
    }
}  catch  {
    print(error)
}