单是什么？ 刻薄

Question

I found some example code when building a menu bar item in OS X. It makes use of the single | and I'm unsure what it actually means.

(What I'm trying to do is have a function called on left click of the menu item, but have it show the menu on right click)

Here's my code

//Get reference to main system status bar
let statusItem = NSStatusBar.systemStatusBar().statusItemWithLength(-1)
statusItem.image = icon
statusItem.menu = menuBar
if let statusButton = statusItem.button
{
    statusButton.target = self
    statusButton.action = #selector(statusItemClicked)

    statusButton.sendActionOn(Int(NSEventMask.RightMouseUpMask.rawValue | NSEventMask.LeftMouseUpMask.rawValue))

}

Original Answer with code Left vs Right Click Status Bar Item Mac Swift 2

Answer 1

Bitwise OR, just like it does in most C-like languages. In this context, it's being used to combine flags.

Answer 2

That must be really old code. Nowadays, in modern Swift, NSEventMask is an Option Set . You can just say [NSEventMask.rightMouseUp, NSEventMask.leftMouseUp] , and you don't need the Int cast at all. (Or if you haven't updated to Swift 3 yet, the case names would start with capital letters.)