swiftmacosnsstatusbar

NSStatusBar + Swift: title shows and immediately disappear

I want make status bar for macOS, but after I run application title shows and immediately disappears

func applicationDidFinishLaunching(_ aNotification: Notification) {
        // Insert code here to initialize your application
        let statusItem = NSStatusBar.system().statusItem(withLength: NSVariableStatusItemLength)
        statusItem.title = "Hello"

    }

I think something wrong with references, but don't know how to fix this problem.

Solution

  • Indeed you need a strong reference to the status item

    var statusItem : NSStatusItem!

func applicationDidFinishLaunching(_ aNotification: Notification) {
        // Insert code here to initialize your application
        statusItem = NSStatusBar.system().statusItem(withLength: NSVariableStatusItemLength)
        statusItem.title = "Hello"

}

    However I recommend to use a closure to initialize the status item

    let statusItem : NSStatusItem = {
    let item =  NSStatusBar.system().statusItem(withLength: NSVariableStatusItemLength)
    item.title = "Hello"
    return item
}()