swift - iOS9 Swift 文件创建 NSFileManager.createDirectoryAtPath 与 NSURL

Question

在iOS9之前，我们已经创建了这样一个目录

let documentsPath = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0] as! String
let logsPath = documentsPath.stringByAppendingPathComponent("logs")
let errorPointer = NSErrorPointer()
NSFileManager.defaultManager().createDirectoryAtPath(logsPath, withIntermediateDirectories: true, attributes: nil, error: errorPointer)

但是在 iOS9 中，他们删除了 String.stringByAppendingPathComponent。自动转换工具用 NSURL 代替了我们对 String 的使用。 createDirectoryAtPath() 需要一个字符串，所以我需要将 NSURL 转换为一个字符串。我们像这样使用 absolutePath:(iOS9 的更新)

let documentsPath = NSURL(fileURLWithPath: NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0])
let logsPath = documentsPath.URLByAppendingPathComponent("logs")
do {
    try NSFileManager.defaultManager().createDirectoryAtPath(logsPath.absoluteString, withIntermediateDirectories: true, attributes: nil)
} catch let error as NSError {
    NSLog("Unable to create directory \(error.debugDescription)")
}

但是我收到以下错误:

Unable to create directory Error Domain=NSCocoaErrorDomain Code=513 "You don’t have permission to save the file “logs” in the folder “Documents”." UserInfo={NSFilePath=file:///var/mobile/Containers/Data/Application/F2EF2D4F-94AF-4BF2-AF9E-D0ECBC8637E7/Documents/logs/, NSUnderlyingError=0x15664d070 {Error Domain=NSPOSIXErrorDomain Code=1 "Operation not permitted"}}

Answer 1

我想出了这个。 createDirectoryAtPath() 无法处理带有“file://”前缀的路径。要获得没有前缀的路径，您必须使用 path() 或 relativePath()。

let documentsPath = NSURL(fileURLWithPath: NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0])
let logsPath = documentsPath.URLByAppendingPathComponent("logs")
do {
    try NSFileManager.defaultManager().createDirectoryAtPath(logsPath.path!, withIntermediateDirectories: true, attributes: nil)
} catch let error as NSError {
    NSLog("Unable to create directory \(error.debugDescription)")
}

路径不正确(注意file://):

文件:///var/mobile/Containers/Data/Application/F2EF2D4F-94AF-4BF2-AF9E-D0ECBC8637E7/Documents/logs/

正确路径:

/var/mobile/Containers/Data/Application/F2EF2D4F-94AF-4BF2-AF9E-D0ECBC8637E7/Documents/logs/