xcode - Opening NSSavePanel as sheet -


i using xcode7 beta2 play around swift 2. trying use file-selection dialog (nssavepanel) brought me trouble.

running following code clicking associated button won't bring dialog sheet (not @ all) make window's decoration disappear, leaving in broken state otherwise functional sheets open dialogs without decoration. using call deprecated api beginsheetmodalforwindow, in commented line, works expected. 

@ibaction func openfileclicked(sender: anyobject) {         let openpanel = nssavepanel()         openpanel.cancreatedirectories = true         //openpanel.beginsheetmodalforwindow(self.view.window!, completionhandler: {         openpanel.beginsheet(self.view.window!, completionhandler: {             (result) -> void in             print("opening:\(result)" )         })     }

is code broken somehow or there issue api calling.


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