Access object in AppDelegate from ViewController

Question

In AppDelegate.swift I've declared an NSStatusBar object like this:

var statusItem = NSStatusBar.system.statusItem(withLength: NSStatusItem.variableLength)
statusItem.button?.title = "chess"
statusItem.button?.target = self
statusItem.button?.action = #selector(showSettings)

and works fine, but I want to change the title in the viewController.swift

I trying this (In view controller):

var appd = AppDelegate()
appd.statusItem.button?.title = "ELO: \(parsing2.chess_daily.last.rating)"

But the title not change... how can I do this???

Try creating a function in your AppDelegate that changes the title, and then call that from your vc: AppDelegate().changeStatusTitle("ELO") — koen
– koen, Commented May 27, 2019 at 14:46
I don't think that calling functions that belong to your AppDelegate from another class would be good coding style — Swifty
– Swifty, Commented May 27, 2019 at 14:47
@RX9 the app delegate is the root singleton of the app that's there in large part to handle objects and functions that don't have any other better owning view controller. Accessing data from and calling functions in the app delegate is a very standard coding practice. The problem OP is having is that he isn't accessing the singleton instance. — ctrl freak
– ctrl freak, Commented May 27, 2019 at 16:57

vadian · Accepted Answer · 2019-05-27 17:04:49Z

1

Get the delegate object from NSApplication, the default initializer AppDelegate() creates a new unrelated instance.

let appDelegate = NSApp.delegate as! AppDelegate
appDelegate.statusItem.button?.title = "ELO: \(parsing2.chess_daily.last.rating)"

answered May 27, 2019 at 17:04

vadian

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