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
}
}
答案 0 :(得分: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。