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Use NSTrackingArea in project running, get print — Failed to set (contentViewController) user defined inspected property on (NSWindow): trackingArea options 0x3 do not specify when the tracking area is active
After I create a new project — macOS → App! And I new a NSTrackingArea object, add it on self.view in 'ViewController.swift', as following: let opt = (     NSTrackingArea.Options.mouseEnteredAndExited.rawValue |     NSTrackingArea.Options.mouseMoved.rawValue ) let trackingArea = NSTrackingArea(rect: kb_V!.frame, options: NSTrackingArea.Options(rawValue: opt), owner:self, userInfo: nil) self.view .addTrackingArea(trackingArea) But it gets the print "Failed to set (contentViewController) user defined inspected property on (NSWindow): trackingArea options 0x3 do not specify when the tracking area is active" when I'm running my project! I feel so wonder about it, And I want to konw how to fix it~
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Jun ’21