Reading, parsing, writing files.
Jan 13 2019
Xcode 10, macOS 13.5, Swift 4.2 Without wanting to delve too deep into the NSDocumentController class: It’s part of the document architecture, and if your app uses more than one NSDocument subclass, you will need to override the following method: override func makeUntitledDocument(ofType typeName: String) throws -> NSDocument { switch typeName { case “ThingB”: return […]
Mar 11 2018
macOS 10.12 (I will update this post once I’ve moved to 10.13) UTIs are necessary for – creating/setting filetypes for a document-based app (whether using NSDocument or not) – telling the system which filetypes your apps will open On macOS, you’re more likely to encounter UTIs in the both context; the importing of files (eg […]
Feb 27 2018
macOS 10.12.6; Xcode 9.2; Swift 4.0 This is the basic ‘create a file’ post; you still need to register your filetype with the Finder and tell your app what it means to open a file when the user double-clicks it in the Finder; there is a separate post on Filetypes and UTIs which builds on […]
Feb 13 2018
Once you start looking into what file creation and reading involves, you may feel an urge to run away screaming. I certainly did. So far, I have managed to write posts on – NSOpenPanel/NSSavePanel – Basic FileManager paths/URLs – custom file types – Codable/NSCoding These posts do not touch on – file coordinators and -presenters […]
Feb 7 2018
macOS 10.12; Swift 4 Basics Opening and saving files is part of many, if not most Mac Apps, and there are many ways of achieving this. I wanted to review my practice and hope to arrive at a clean, swifty way of file handling. In this post, I will concentrate on NSOpenPanel and NSSavePanel, rather […]
Feb 7 2018
macOS 10.12; Swift 4 This post started as an offshoot of the NSOpenPanel/NSSavePanel post. Frequently I want to navigate to certain locations – eg, my apps ApplicationSupport folder, or the user’s document folder – and I could never remember how to get to them. (Spoiler: I think this API has been updated a lot since […]
Jan 28 2019
Get the modification (or creation) date of a file
Xcode 10, Swift 4.2, macOS 10.13 func fileModificationDate(url: URL) -> Date? { do { let attr = try FileManager.default.attributesOfItem(atPath: url.path) return attr[FileAttributeKey.modificationDate] as? Date } catch { return nil } } FileAttributeKey.creationDate works exactly the same; .size and .type might also be of interest. This beautiful and elegant solution comes from this Stackoverflow answer and […]
By Extelligent Cocoa • File Handling, Wiki • • Tags: FileAttributeKey, FileManager