I have a view with several subviews (NSButton, NSTextField, NSPopUpButton) and a NSImageView with a spinner icon which should be displayed on top of the other views while data is retrieved from the web.
To display the NSImageView on top I have set
imageViewSpinner.wantsLayer = true
imageViewSpinner.layer?.backgroundColor = NSColor.windowBackgroundColor.cgColor
The problem is, that the focus borders and PopUpButtons are still accessible/shining through the NSImageView (see attached video).
To solve this, I could iterate over all the other subviews and set them to "isHidden" or "disabled" but I wonder, if there is a cleaner solution to this problem, for example defining the NSImageView as topmost layer without things getting through?