osx - On Mac, Drag file to my NSTableVIew? -

i able drag (any) file view-based nstableview, in delegate have setup:

class myviewcontroller: nsviewcontroller, nstableviewdelegate, nstableviewdatasource, nsdraggingdestination {     @iboutlet var tableview: nstableview! // connected in storyboard.      override func viewdidload()     {         super.viewdidload()         tableview.registerfordraggedtypes([nsfilenamespboardtype])         // …     }      func draggingentered(sender: nsdragginginfo) -> nsdragoperation     {         println("drag entered.")         return .copy     }      func preparefordragoperation(sender: nsdragginginfo) -> bool     {         return true     }      func draggingupdated(sender: nsdragginginfo) -> nsdragoperation     {         return .copy     }     // ... } 

but program refuses react drag-n-drop. when drag file finder , release, file icon flies finder. missing in code?

update: added this

func performdragoperation(sender: nsdragginginfo) -> bool {     return true } 

but still doesn’t work. should implement in view instead of delegate? document says “either window object or delegate may implement these methods;”

if @ sample code apple puts in "receiving drag operations" documentation, last function put there implementation of:

- (bool)performdragoperation:(id <nsdragginginfo>)sender

you need implement , return "yes" indicate drag succeeded.