我不理解NSDocument的要求;我只需要记录网址，以便在以后恢复Windows时，将再次检索网址。但是我使用Swift：我添加了＆＃34; @ objc＆＃34;常规思考是不同的。我来自我的客观传统，看起来堆栈名称使用了这种传统。最新的Swift版本（xcode 8.3）与7.3.1版本更加不同！
我尝试做的是将文档与网址关联，并在被要求将其转储到磁盘时。一旦我解决了这个问题，该文档将成为一个plist。从我原来的问题我可以放弃的第一个功能？
class PlayItem : NSObject {
var name : String = k.item
var link : URL = URL.init(string: "http://")!
var time : TimeInterval
var rank : Int
override init() {
name = k.item
link = URL.init(string: "http://")!
time = 0.0
rank = 0
super.init()
}
init(name:String, link:URL, time:TimeInterval, rank:Int) {
self.name = name
self.link = link
self.time = time
self.rank = rank
super.init()
}
override var description : String {
return String(format: "%@: %p '%@'", self.className, self, name)
}
}
class Document : NSDocument {
@objc func readFromURL(url: NSURL, ofType typeName: String, error outError: NSErrorPointer) -> Bool {
self.fileURL = url as URL
self.fileType = typeName
return true
}
convenience init(contentsOf: URL, ofType: String) throws {
self.init()
switch ofType {
case "internal":
self.fileURL = contentsOf
self.fileType = ofType
break
default:
Swift.print("nyi")
}
throw NSError(domain: NSOSStatusErrorDomain, code: unimpErr, userInfo: nil)
}
override func read(from url: URL, ofType typeName: String) throws {
switch typeName {
case "internal":
self.fileURL = url
self.fileType = typeName
break
case "h2o":
let data = try Data.init(contentsOf: url)
do {
try! self.read(from: data, ofType: typeName)
self.fileURL = url as URL
self.fileType = typeName
}
break
default:
Swift.print("nyi \(typeName)")
break
}
throw NSError(domain: NSOSStatusErrorDomain, code: unimpErr, userInfo: nil)
override func write(to url: URL, ofType typeName: String) throws {
switch typeName {
case "DocumentType":
var temp = [Dictionary<String,AnyObject>]()
for key in playlists.keys {
var list = Array<AnyObject>()
for playitem in playlists[key] as! [PlayItem] {
let item : [String:AnyObject] = [k.name:playitem.name as AnyObject, k.link:playitem.link.absoluteString as AnyObject, k.time:playitem.time as AnyObject, k.rank:playitem.rank as AnyObject]
list.append(item as AnyObject)
}
temp.append([k.name:key as AnyObject, k.list:list as AnyObject])
}
UserDefaults.standard.set(temp, forKey: UserSettings.Playlists.keyPath)
UserDefaults.standard.synchronize()
break
case "h2o":
let dict = NSDictionary.init()
dict.setValue(playlists, forKey: UserSettings.Playlists.keyPath)
dict.setValue(settings, forKey: UserSettings.PlayPrefs.keyPath)
dict.write(to: url, atomically: true)
break
default:
Swift.print("nyi \(typeName)")
throw NSError(domain: NSOSStatusErrorDomain, code: unimpErr, userInfo: nil)
}
}
}
出现此错误：
0 CoreFoundation 0x00007fff89ed52cb __exceptionPreprocess + 171
1 libobjc.A.dylib 0x00007fff9ece048d objc_exception_throw + 48
2 CoreFoundation 0x00007fff89f53c3d +[NSException raise:format:] + 205
3 AppKit 0x00007fff87e65a45 -[NSDocument readFromURL:ofType:error:] + 419
4 AppKit 0x00007fff87b66dd7 -[NSDocument _initWithContentsOfURL:ofType:error:] + 172
5 AppKit 0x00007fff87b66cbc -[NSDocument initWithContentsOfURL:ofType:error:] + 231
我怀疑投掷是否活跃，但我在每个功能上的突破都没有被击中？我想我的最近菜单永远不会正常，直到这个问题得到解决，并且每次运行都创建了比最后一个更多的窗口，所以我希望解决方案能够解决这些问题。