Question

我是swift的新手，我正在尝试使用我在文档目录中创建的文件夹中名为“Dates”的文件夹填充一个uipicker。

我可以使用以下代码列出文件：

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数组中，我可以在swift中加载选择器。

我之前使用目标c：

在之前的应用中完成了此操作

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:)];

我希望有人可以提供帮助，如果可以，请提前感谢你！

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你。

来自HERE的参考。

Answer 2

非常感谢你！

这个代码示例很有效！

https://github.com/DharmeshKheni/Show-Document-Directory

我在选择器中显示文件列表的唯一主要变化是，我必须将我的选择器委托连接到视图控制器：

类ViewTwo：UIViewController， UIPickerViewDelegate {

.......然后在'ViewDidLoad'之后声明它：

filePicker.delegate = self

UiPickerDataSource不是必需的，当我尝试将它连接到viewController时抛出异常。

再次感谢！

使用contentsOfDirectory Swift

2 个答案: