ios 如何使用 Swift 代码 (NSFileManager) 创建目录

How to create directory using Swift code (NSFileManager)

提问by Gian

I'm having some trouble with converting Objective-C code to create a directory for Swift.

我在转换 Objective-C 代码以创建 Swift 目录时遇到了一些麻烦。

Objective-C:

目标-C：

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0]; // Get documents folder
    NSString *dataPath = [documentsDirectory stringByAppendingPathComponent:@"/MyFolder"];

    if (![[NSFileManager defaultManager] fileExistsAtPath:dataPath])
    [[NSFileManager defaultManager] createDirectoryAtPath:dataPath withIntermediateDirectories:NO attributes:nil error:&error];

回答by Kampai

Swift 5.0

斯威夫特 5.0

let paths = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)
let documentsDirectory = paths[0]
let docURL = URL(string: documentsDirectory)!
let dataPath = docURL.appendingPathComponent("MyFolder")
if !FileManager.default.fileExists(atPath: dataPath.absoluteString) {
    do {
        try FileManager.default.createDirectory(atPath: dataPath.absoluteString, withIntermediateDirectories: true, attributes: nil)
    } catch {
        print(error.localizedDescription);
    }
}

Swift 4.0

斯威夫特 4.0

let paths = NSSearchPathForDirectoriesInDomains(FileManager.SearchPathDirectory.documentDirectory, FileManager.SearchPathDomainMask.userDomainMask, true)
let documentsDirectory: AnyObject = paths[0] as AnyObject
let dataPath = documentsDirectory.appendingPathComponent("MyFolder")!

do {
    try FileManager.default.createDirectory(atPath: dataPath.absoluteString, withIntermediateDirectories: false, attributes: nil)
} catch let error as NSError {
    print(error.localizedDescription);
}

Swift 3.0

斯威夫特 3.0

let paths = NSSearchPathForDirectoriesInDomains(FileManager.SearchPathDirectory.documentDirectory, FileManager.SearchPathDomainMask.userDomainMask, true)
let documentsDirectory: AnyObject = paths[0]
let dataPath = documentsDirectory.appendingPathComponent("MyFolder")!

do {
    try FileManager.default.createDirectory(atPath: dataPath.absoluteString, withIntermediateDirectories: false, attributes: nil)
} catch let error as NSError {
    print(error.localizedDescription);
}

Swift 2.1

斯威夫特 2.1

You can create directory using below method:

您可以使用以下方法创建目录：

let paths = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory, NSSearchPathDomainMask.UserDomainMask, true)
let documentsDirectory: AnyObject = paths[0]
let dataPath = documentsDirectory.stringByAppendingPathComponent("MyFolder")

do {
    try NSFileManager.defaultManager().createDirectoryAtPath(dataPath, withIntermediateDirectories: false, attributes: nil)
} catch let error as NSError {
    print(error.localizedDescription);
}

回答by Mehdi Hosseinzadeh

None of @Kampai and @Crashalot's answers worked for me.

@Kampai 和 @Crashalot 的答案都没有对我有用。

The .absoluteStringmakes a url with file://prefix and it cause exception while creating directory. Instead I've used .pathmethod.

该.absoluteString使得一个URL文件：//前缀，导致异常在创建目录。相反，我使用了.path方法。

The fixed code for Swift 3

Swift 3的固定代码

let documentsDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
let dataPath = documentsDirectory.appendingPathComponent("MyFolder")

do {
    try FileManager.default.createDirectory(atPath: dataPath.path, withIntermediateDirectories: true, attributes: nil)
} catch let error as NSError {
    print("Error creating directory: \(error.localizedDescription)")
}

回答by Crashalot

The accepted answer no longer compiles as the line with appendingPathComponentgenerates an error.

接受的答案不再编译，因为带有appendingPathComponent生成错误的行。

Here's a Swift 3 version that compiles:

这是一个可以编译的 Swift 3 版本：

fileprivate func createDir(dirName: String) {
    let documentsDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)[0]
    let dataPath = documentsDirectory.appendingPathComponent(dirName)

    do {
        try FileManager.default.createDirectory(atPath: dataPath.absoluteString, withIntermediateDirectories: false, attributes: nil)
    } catch let error as NSError {
        printError("Error creating directory: \(error.localizedDescription)")
    }
}

回答by Dhasdhageerkhan

Swift 4 :

斯威夫特 4：

NSSearchPathForDirectoriesInDomains returns an array of strings, not URLs.

NSSearchPathForDirectoriesInDomains 返回一个字符串数组，而不是 URL。

appendingPathComponent to string makes app crash with the message -[NSPathStore2 URLByAppendingPathComponent:]: unrecognized selector sent to instance

将路径组件附加到字符串使应用程序崩溃并显示消息 -[NSPathStore2 URLByAppendingPathComponent:]: unrecognized selector sent to instance

Here's a Swift 4 version that compiles:

这是一个可以编译的 Swift 4 版本：

    let paths = NSSearchPathForDirectoriesInDomains(FileManager.SearchPathDirectory.documentDirectory, FileManager.SearchPathDomainMask.userDomainMask, true)
    if let pathURL = URL.init(string: paths[0]) {
        let dataURL = pathURL.appendingPathComponent("MyFolder")
        do {
            try FileManager.default.createDirectory(atPath: dataURL.absoluteString, withIntermediateDirectories: true, attributes: nil)
        } catch let error as NSError {
            print(error.localizedDescription);
        }
    }
    else {
        print("Error in getting path URL");
    }

回答by Praveen

Swift 5

斯威夫特 5

guard let path = NSSearchPathForDirectoriesInDomains(FileManager.SearchPathDirectory.documentDirectory, FileManager.SearchPathDomainMask.userDomainMask, true).first else { return }
    if let pathURL = URL.init(string: path) {
        let dataURL = pathURL.appendingPathComponent("MyFolderName")
        do {
            try FileManager.default.createDirectory(atPath: dataURL.absoluteString, withIntermediateDirectories: true, attributes: nil)
        } catch let error as NSError {
            print(error.localizedDescription);
        }
    }
    else {
        print("Error in URL path");
    }

回答by Gurjinder Singh

Swift 4

斯威夫特 4

// DB Directory and Path
lazy var applicationDocumentsDirectory: URL = {

    let urls = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)
    let documentDirectoryURL = urls[urls.count - 1] as URL
    let dbDirectoryURL = documentDirectoryURL.appendingPathComponent("DB")

    if FileManager.default.fileExists(atPath: dbDirectoryURL.path) == false{
        do{
            try FileManager.default.createDirectory(at: dbDirectoryURL, withIntermediateDirectories: false, attributes: nil)
        }catch{
        }
    }
    return dbDirectoryURL
}()

回答by bona912

For Other developers, Im gonna leave this here as it may help someone like me looking for a way to figure out where the folder is being created.

对于其他开发人员，我将把它留在这里，因为它可能会帮助像我这样的人寻找一种方法来找出文件夹的创建位置。

let paths = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true) as NSArray
let documentsDir = paths.firstObject as String
println("Path to the Documents directory\n\(documentsDir)")

回答by eonist

Simpler solution:

更简单的解决方案：

"~/Desktop/demo".expand.createDir()//Now you have a folder named demo on your desk

extension String{
    func createDir(_ path:String){
        do {
            try FileManager.default.createDirectory(atPath: path, withIntermediateDirectories: true, attributes: nil)
        } catch let error as NSError {
            NSLog("Unable to create directory \(error.debugDescription)")
        }
    }
    var expand:String {return NSString(string: self).expandingTildeInPath}
}