Mac OS Resize Button

How to trigger a event when resize button is resize button

1 Answer
1

windowDidResize function

From the developer website, you can find this function declaration from NSWindowDelegate:

NSWindowDelegate

optional func windowDidResize(_ notification: Notification)


Tells the delegate that the window has been resized.

So, for illustration sake (in Swift 4):

class YourViewController: NSViewController, NSWindowDelegate {

// constructors and other methods are omitted for illustration simplicity

func windowDidResize(_ notification: Notification) {
// You can listen to window resize event here
}
}


Other useful functions

Note that there is other sizing windows functions available:

func windowWillResize(NSWindow, to: NSSize) -> NSSize


Tells the delegate that the window is being resized (whether by the
user or through one of the setFrame... methods other than
setFrame(_:display:) ).

func windowWillStartLiveResize(Notification)


Tells the delegate that the window is about to be live resized.

func windowDidEndLiveResize(Notification)


Tells the delegate that a live resize operation on the window has
ended.

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