如何在Mac App中创建文件

Question

I am new to programming mac apps in Objective-C and need help with this. When I control click and drag to first responder from a button it brings up a box from which you can select some predefined functions that run when the button is clicked. On of the functions says newDocument. I was wondering if this means that it creates a new document (file) and if so how to actually make it create the file. I tried selecting newDocument but when I ran the app it said this: 2016-03-16 15:39:57.889 Test[26619:4382721] The (null) type doesn't map to any NSDocumentClass. My button is simply named create file and has no code attached to it, only the predefined function.

Answer 1

The method you are seeing, newDocument , is part of the Document Architecture . If you wish to use it you need to study the documentation, the particular function newDocument creates a "document" within your app along with an associated "window" rather than a "file" per se .

It sounds like you really need to read the Cocoa Event Handling Guide to learn how to handle a mouse event, and the File System Programming Guide to learn how to read & write files.

HTH