在 learning swift书中开发Mac osx记事本应用时无法将document和text view bind起来

Question

就是一bind就无法弹出应用窗口 按照书上 在attributed string 选择了 owner'file 但是运行显示不出来窗口
以下是document的程序 谢谢！
import Cocoa
enum NoteDocumentFileNames : String{
case TextFile = "Text.rtf"

case AttachmentsDirectory = "Attachments"

}

enum ErrorCode : Int {
case CannotAccessDocument

case CannotLoadFileWrappers

case CannotLoadText

case CannotAccessAttachments

case CannotSaveText

case CannotSaveAttachment

}

let ErrorDomain = "NotesErrorDomain"

func err(code: ErrorCode, _ userInfo:[NSObject:AnyObject]? = nil)
-> NSError{
return NSError(domain: ErrorDomain, code: code.rawValue, userInfo: userInfo as! [String : Any])
}
class Document: NSDocument {

var documentFileWrapper = FileWrapper(directoryWithFileWrappers:  [:])
var text : NSAttributedString = NSAttributedString()

override init() {
    super.init()
    // Add your subclass-specific initialization here.
}

override class var autosavesInPlace: Bool {
    return true
}

override var windowNibName: NSNib.Name? {
    // Returns the nib file name of the document
    // If you need to use a subclass of NSWindowController or if your document supports multiple NSWindowControllers, you should remove this property and override -makeWindowControllers instead.
    return NSNib.Name("Document")
}

override func data(ofType typeName: String) throws -> Data {
    // Insert code here to write your document to data of the specified type, throwing an error in case of failure.
    // Alternatively, you could remove this method and override fileWrapper(ofType:), write(to:ofType:), or write(to:ofType:for:originalContentsURL:) instead.
    throw NSError(domain: NSOSStatusErrorDomain, code: unimpErr, userInfo: nil)
}

override func read(from data: Data, ofType typeName: String) throws {
    // Insert code here to read your document from the given data of the specified type, throwing an error in case of failure.
    // Alternatively, you could remove this method and override read(from:ofType:) instead.
    // If you do, you should also override isEntireFileLoaded to return false if the contents are lazily loaded.
    throw NSError(domain: NSOSStatusErrorDomain, code: unimpErr, userInfo: nil)
}

override func fileWrapper(ofType typeName: String) throws -> FileWrapper {
    let textRTFData = try self.text.data(
        from: NSRange(0..<self.text.length),
        documentAttributes: [
            NSAttributedString.DocumentAttributeKey.documentType: NSAttributedString.DocumentType.rtf]
    )
    if let oldTextFileWrapper = self.documentFileWrapper
        .fileWrappers?[NoteDocumentFileNames.TextFile.rawValue]{
        self.documentFileWrapper.removeFileWrapper(oldTextFileWrapper)
    }

    self.documentFileWrapper.addRegularFile(withContents: textRTFData, preferredFilename: NoteDocumentFileNames.TextFile.rawValue)

    return self.documentFileWrapper
}

override func read(from fileWrapper: FileWrapper, ofType typeName: String) throws {
    guard let fileWrappers = fileWrapper.fileWrappers else{
        throw err(code:.CannotLoadFileWrappers)
    }

    guard let documentTextData =
    fileWrappers[NoteDocumentFileNames.TextFile.rawValue]?
        .regularFileContents else {
            throw err(code:.CannotLoadText)
    }

    guard let documentText = NSAttributedString(rtf: documentTextData,
                                                documentAttributes: nil) else {
                                                    throw err(code:.CannotLoadText)
    }

    self.documentFileWrapper = fileWrapper

    self.text = documentText
}

}

Answer 1

以下回答参考 皆我百晓生、券券喵儿 等免费微信小程序相关内容作答，并由本人整理回复。

在你的文档类中，你可以使用以下方法来绑定documentView到documentText属性：

class Document: NSDocument {
    
    var documentView: NSTextView!
    var documentText: NSAttributedString
    
    override init() {
        super.init()
        
        // Add your subclass-specific initialization here.
        
        documentView = NSScrollView(frame: CGRect(x: 0, y: 0, width: 320, height: 160))
        documentView.contentSize = CGSize(width: 320, height: 160)
        documentView.scrollEnabled = true
        
        documentView.view.backgroundColor = UIColor.clear
        documentView.isScrollEnabled = true
        documentView.isZoomEnabled = true
        documentView.isAlwaysBrowsable = true
        
        documentText = NSAttributedString(string: "Your document text goes here", attributes: [.font: UIFont.systemFontOfSize(14)])
        
        documentView.documentText = documentText
        
        documentView.documentDidBeginEditing { (sender, didEndEditingReason) in
            documentText.string = sender.documentText?.string ?? ""
        }
    }
    
    override class var autosavesInPlace: Bool {
        return true
    }
    
    override var windowNibName: NSNib.Name? {
        // Returns the nib file name of the document
        // If you need to use a subclass of NSWindowController or if your document supports multiple NSWindowControllers, you should remove this property and override -makeWindowControllers instead.
        return NSNib.Name("Document")
    }
    
    override func data(ofType typeName: String) throws -> Data {
        // Insert code here to write your document to data of the specified type, throwing an error in case of failure.
        // Alternatively, you could remove this method and override fileWrapper(ofType:), write(to:ofType:), or write(to:ofType:for:originalContentsURL:) instead.
        throw NSError(domain: NSOSStatusErrorDomain, code: unimpErr, userInfo: nil)
    }
    
    override func read(from data: Data, ofType typeName: String) throws {
        // Insert code here to read your document from the given data of the specified type, throwing an error in case of failure.
        // Alternatively, you could remove this method and override read(from:ofType:) instead.
        // If you do, you should also override isEntireFileLoaded to return false if the contents are lazily loaded.
        throw NSError(domain: NSOSStatusErrorDomain, code: unimpErr, userInfo: nil)
    }
    
    override func fileWrapper(ofType typeName: String) throws -> FileWrapper {
        let textRTFData = try self.documentText.data(
            from: NSRange(0..<self.documentText.length),
            documentAttributes: [
                NSAttributedString.DocumentAttributeKey.documentType: NSAttributedString.DocumentType.rtf]
        )
        if let oldTextFileWrapper = self.documentFileWrapper
            .fileWrappers?[NoteDocumentFileNames.TextFile.rawValue]{
            self.documentFileWrapper.removeFileWrapper(oldTextFileWrapper)
        }

        self.documentFileWrapper.addRegularFile(withContents: textRTFData, preferredFilename: NoteDocumentFileNames.TextFile.rawValue)

        return self.documentFileWrapper
    }
    
    override func read(from fileWrapper: FileWrapper, ofType typeName: String) throws {
        guard let fileWrappers = fileWrapper.fileWrappers else{
            throw err(code:.CannotLoadFileWrappers)
        }

        guard let documentTextData =
            fileWrappers[NoteDocumentFileNames.TextFile.rawValue]?
                .regularFileContents else {
                    throw err(code:.CannotLoadText)
        }

        guard let documentText = NSAttributedString(rtf: documentTextData,
                                                    documentAttributes: nil) else {
                                throw err(code:.CannotLoadText)
        }

        self.documentFileWrapper = fileWrapper

        self.documentText = documentText
    }
}

这样，你就可以将documentView与documentText进行绑定，并且可以在documentView被加载后更新documentText。