swift - 用 contentsOfDirectory Swift 填充 uipicker

Question

我是 swift 的新手，我正在尝试使用我在名为“Dates”的文档目录中创建的文件夹中的文件名填充 uipicker。

我可以使用这段代码列出文件:

func listFilesFromDatesFolder() {

        let paths = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)

        let documentDirectory = paths[0] as! String

        let path = documentDirectory.stringByAppendingPathComponent("Dates")

        let manager = NSFileManager.defaultManager()

        if let allItems = manager.contentsOfDirectoryAtPath(path, error: nil) {
            println(allItems)
        }
}

我只是不确定如何将列表放入一个数组中，以便我可以快速加载选择器。

我以前在一个使用 objective-c 的应用程序中这样做过:

NSFileManager *directoryContent;

NSArray *path = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [path objectAtIndex:0];

NSString *contractorDir= [documentsDirectory stringByAppendingPathComponent:contractorTwo.text];

NSError *err;directoryContent = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:contractorDir error: err];


NSArray *sorted = [directoryContent sortedArrayUsingSelector:@selector(compare:)];

我希望有人可以帮助解决这个问题，如果可以的话，在此先感谢您!

干杯

Answer 1

查看此示例代码:

import UIKit

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()

        let (filenamesOpt, errorOpt) = contentsOfDirectoryAtPath("/Users")
        if let filenames = filenamesOpt {
            println(filenames)                // [".localized", "kris", ...]
        }

        let (filenamesOpt2, errorOpt2) = contentsOfDirectoryAtPath("/NoSuchDirectory")
        if let err = errorOpt2 {
            err.description         // "Error Domain=NSCocoaErrorDomain Code=260 "The operation couldn’t be completed. ... "
        }

        getContentsOfDirectoryAtPath("/Users") { (result, error) in
            if let e = error {
                e.description
            }
            else if let filenames = result {
                filenames                     // [".localized", "kdj", ... ]
            }
        }

        getContentsOfDirectoryAtPath("/NoSuchDirectory") { (result, error) in
            if let e = error {
                e.description                // "Error Domain=NSCocoaError..."
            }
            else if let filenames = result {
                filenames
            }
        }

        // Do something with the files in my home directory
        let listMyFiles = { block in self.getContentsOfDirectoryAtPath("/Users/kdj", block: block) }

        listMyFiles { (result, error) in
            if let e = error {
                e.description
            }
            else if let filenames = result {
                filenames                     // [".bashrc", ... ]
            }
        }
    }

    // Tuple result

    // Get contents of directory at specified path, returning (filenames, nil) or (nil, error)
    func contentsOfDirectoryAtPath(path: String) -> (filenames: [String]?, error: NSError?) {
        var error: NSError? = nil
        let fileManager = NSFileManager.defaultManager()
        let contents = fileManager.contentsOfDirectoryAtPath(path, error: &error)
        if contents == nil {
            return (nil, error)
        }
        else {
            let filenames = contents as! [String]
            return (filenames, nil)
        }
    }

    // Continuation Passing Style (CPS) interface

    // Get contents of directory at specified path, invoking block with (filenames, nil) or (nil, error)
    func getContentsOfDirectoryAtPath(path: String, block: (filenames: [String]?, error: NSError?) -> ()) {
        var error: NSError? = nil
        let fileManager = NSFileManager.defaultManager()
        let contents = fileManager.contentsOfDirectoryAtPath(path, error: &error)
        if contents == nil {
            block(filenames: nil, error: error)
        }
        else {
            let filenames = contents as! [String]
            block(filenames: filenames, error: nil)
        }
    }
}

让我知道它是否适合您。

引用自HERE .