Question

每次节点可扩展时，我想获取并显示NSOutlineView上的用户主目录。

到目前为止，我只能获得第一级并将其扩展到第二级。

我想它必须附加到索引或类似的东西上。

我可以得到1级和2级。当我单击2级时，例如Documents，有一个目录yourDirectoryName，其中包含更多目录。我想显示箭头，并能够在树上继续前进

第一张照片是我的应用。第二张图片是filezilla的示例

import Cocoa
class Directories {
var name: String
var subDirectories: [String]

init(name: String, subDirectories: [String]) {
    self.name = name
    self.subDirectories = subDirectories
}
}

class ViewController: NSViewController {
var directories = [Directories]()
@IBOutlet weak var outlineView: NSOutlineView!

override func viewDidLoad() {
    super.viewDidLoad()
    getDir(path: "")
    outlineView.dataSource = self
    outlineView.delegate = self
}



func getDir(path: String) {
     let fm = FileManager.default.homeDirectoryForCurrentUser

    do {
        let items = contentsOf(folder: fm)
        for item in items {
            let sub = getSubDir(path: item.lastPathComponent)
            let re = Directories(name: item.lastPathComponent, subDirectories: sub)
            directories.append(re)
        }
    }
}

func contentsOf(folder: URL) -> [URL] {
    let fileManager = FileManager.default
    do {
        let contents = try fileManager.contentsOfDirectory(atPath: folder.path)

        let urls = contents.map { return folder.appendingPathComponent($0) }
        return urls
    } catch {
        return []
    }
}

func getSubDir(path: String) -> [String]{
    var sub = [String]()
    let fm = FileManager.default
    let filePath = NSString(string: path).expandingTildeInPath
    do {
        let items = try fm.contentsOfDirectory(atPath: filePath)
        for item in items {
            sub.append(item)
        }
    } catch {
        // failed to read directory
    }
    return sub
}

override var representedObject: Any? {
    didSet {
        // Update the view, if already loaded.
    }
}
}



extension ViewController: NSOutlineViewDataSource {
func outlineView(_ outlineView: NSOutlineView, child index: Int, ofItem item: Any?) -> Any {
    if let directories = item as? Directories {
        return directories.subDirectories[index]
    }
    return directories[index]
}

func outlineView(_ outlineView: NSOutlineView, isItemExpandable item: Any) -> Bool {
    if let directories = item as? Directories {
        return directories.subDirectories.count > 0
    }
    return false
}

func outlineView(_ outlineView: NSOutlineView, numberOfChildrenOfItem item: Any?) -> Int {
    if let directories = item as? Directories {
        return directories.subDirectories.count
    }
    return directories.count
}
}

extension ViewController: NSOutlineViewDelegate {
func outlineView(_ outlineView: NSOutlineView, viewFor tableColumn: NSTableColumn?, item: Any) -> NSView? {
    var text = ""
    if let directories = item as? Directories {
        text = directories.name
    }
    else {
        text = item as! String
    }

    let tableCell = outlineView.makeView(withIdentifier: NSUserInterfaceItemIdentifier(rawValue: "cell"), owner: self) as! NSTableCellView
    tableCell.textField!.stringValue = text
    return tableCell
}
}

Answer 1

将级别2扩展到3与将级别1扩展到2相同。子目录是目录，并且具有自己的子目录。 subDirectories的{{1}}属性应为Directories的数组。 Directories的{{1}}属性指向目录树，并且可以是directories。

示例：

ViewController

免责声明：我已经习惯了Objective-C，并且在Swift领域苦苦挣扎。

如何向目录树之类的NSOutlineView上的节点添加更多节点？

1 个答案: