Extelligent Cocoa – Page 4 – Because one brain is not enough

Feb 16 2017

TDD Basics

This link points to a series of blogposts on TDD (test-driven design) which explains the process very clearly, with a follow-along example. I have reservations about the process, but this is a good place to start if you’re interested.

By Extelligent Cocoa • Application Design, Resources •

Jan 31 2017

selectionDidChange

I’ve just discovered an unwelcome difference between func tableViewSelectionDidChange(_ notification: Notification) and func outlineViewSelectionDidChange(_ notification: Notification) (NSOutlineView inherits from NSTableView, and the protocols share a lot of similarities). When there is no valid selection in an NSOutlineView, outlineviewSelectionDidChange fires, and outlineView.selectedRow is -1. When there is no valid selection in an NSTableView, tableViewSelectionDidChange does not […]

By Extelligent Cocoa • Bug Reports • • Tags: NSOutlineView, NSTableView

Jan 15 2017

NSOutlineView Part 2: Making the outlineView useful

Xcode 8, macOS 10.12, Swift 3.0 In Part 1 of this tutorial, we created an outlineView that, thanks to a SourceListItem protocol, was indefinitely flexible: you can have different classes on several levels, or indefinite levels (though it is probably wise to limit this programatically so you don’t nest too deep. It all depends on […]

By Extelligent Cocoa • Application Design, Bug Reports, Interface, Tutorials, Wiki • • Tags: NSOutlineView, SourceList

Jan 15 2017

Finding the index/indices of an element in an array

Swift 3, macOS 10.12 class Food { var name: String = “” init(name: String){ self.name = name } } let chocolate = Food(name: “Chocolate”) let spinach = Food(name: “Spinach”) let greenTea = Food(name: “Green Tea”) let favouriteThings = [greenTea, chocolate, greenTea, spinach, greenTea] If your element conforms to the equatable protocol or inherits from NSObject, […]

By Extelligent Cocoa • Operators, Wiki • • Tags: array, index

Jan 12 2017

NSPopover and storyboards

macOS 10.12, Xcode 8.0, Swift 3 Storyboard segues make it exceedingly easy to create popovers, but sometimes you want to customise your popovers a bit more, for instance make windows detachable. When building interfaces the old-fashioned way with xib files or in code, you would use the NSPopoverDelegate protocol and wire things up appropriately. Storyboards […]

By Extelligent Cocoa • Interface, Wiki • • Tags: NSPopover, NSPopoverDelegate, storyboards

Jan 10 2017

Blog Update: macOS Sierra

I have finally made the switch to using Sierra as my main OS, so from this point onwards, all code will be linked to the macOS 10.12 SDK. Of the three options – supporting legacy software, and risking that advice does not work on the current system, keeping two (or more) versions of code updated […]

By Extelligent Cocoa • EC Meta •

Jan 10 2017

The incredible invisible window

OSX 10.12, Xcode 8.0 I’m not entirely certain under which circumstances this is useful, but [code language=”plain”]class invisibleWindowController: NSWindowController { override func windowDidLoad() { super.windowDidLoad() self.window?.isOpaque = false self.window?.backgroundColor = NSColor.clear } }[/code] is a thing of beauty. If the view in the window’s contentViewController overrides override func draw(_ dirtyRect: NSRect), the effect is […]

By Extelligent Cocoa • Interface, Wiki • • Tags: NSWindowController

Jan 8 2017

Awesome Extensions: Selector

Credit for extending Selector goes entirely to Andyy Hope (@AndyyHope) who posted this article on Medium: He looks at the problem of Swift selector syntax being somewhat unwieldy, and turns it into [code language=”plain”]fileprivate extension Selector { static let buttonTapped = #selector(ViewController.buttonTapped(_:)) }[/code] Thanks to fileprivate, you don’t get namespacing conflicts. Awesome. So I […]

By Extelligent Cocoa • Extensions, Wiki • • Tags: NotificationCentre, NSNotification.Name, Selector

Jan 5 2017

Application Design: Enums (with bonus tuple)

In the zoom example app, to make life easier for me, I went for a cyclical zoom: 2x magnification, 3x magnification, 1x magnification. When Apple first announced Swift, I liked many things about it, but the thing that made me swoon was enums. Swift enums are wonderful tools to shape your application flow. Here, we […]

By Extelligent Cocoa • Application Design, Coding Meta • • Tags: enums, responsibilities, tuples, zoom

Jan 4 2017

NSOutlineView Part1: Setting up an outlineView.

Xcode 8.0, macOS 10.11 (This is Part 1 of 3; in which we will create an NSOutlineView with a flexible data structure that can be used for simple trees and for structures like the one below which contain a number of different, unrelated items. Part 2 will deal with inserting and deleting items, and reacting […]

By Extelligent Cocoa • Tutorials, Wiki • • Tags: enums, NSOutlineView, protocol-oriented programming