---
title: "makeUntitledDocument(ofType:)"
framework: appkit
role: symbol
role_heading: Instance Method
path: "appkit/nsdocumentcontroller/makeuntitleddocument(oftype:)"
---

# makeUntitledDocument(ofType:)

Instantiates a new untitled document of the specified type and returns it if successful.

## Declaration

```swift
func makeUntitledDocument(ofType typeName: String) throws -> NSDocument
```

## Parameters

- `typeName`: The type of the document.

## Discussion

Discussion The document type is specified by typeName. If not successful, the method returns nil after setting outError to point to an NSError object that encapsulates the reason why a new untitled document could not be instantiated. The default implementation of this method calls documentClass(forType:) to find out the class of document to instantiate, then allocates and initializes a document by sending it init(type:). note: In Swift, this method returns a nonoptional result and is marked with the throws keyword to indicate that it throws an error in cases of failure. You call this method in a try expression and handle any errors in the catch clauses of a do statement, as described in Error Handling in The Swift Programming Language and About Imported Cocoa Error Parameters.

## See Also

### Creating and Opening Documents

- [document(for:)](appkit/nsdocumentcontroller/document(for:)-i5zi.md)
- [duplicateDocument(withContentsOf:copying:displayName:)](appkit/nsdocumentcontroller/duplicatedocument(withcontentsof:copying:displayname:).md)
- [openDocument(withContentsOf:display:completionHandler:)](appkit/nsdocumentcontroller/opendocument(withcontentsof:display:completionhandler:).md)
- [openUntitledDocumentAndDisplay(_:)](appkit/nsdocumentcontroller/openuntitleddocumentanddisplay(_:).md)
- [makeDocument(for:withContentsOf:ofType:)](appkit/nsdocumentcontroller/makedocument(for:withcontentsof:oftype:).md)
- [makeDocument(withContentsOf:ofType:)](appkit/nsdocumentcontroller/makedocument(withcontentsof:oftype:).md)
- [reopenDocument(for:withContentsOf:display:completionHandler:)](appkit/nsdocumentcontroller/reopendocument(for:withcontentsof:display:completionhandler:).md)