Swift Drag and Drop won't work outside Xcode - xcode

Question

I have some code, that works in a command line tool. Now i wanted to make it a Drop-Applet to get by the terminal and paths. I am dropping some files to it and as long as the Debugger is attached it works like a charm.
So far so good, but when I start it directly (from the Xcode output directory), it seems the drag/drop is not accepted. (Animation of the file back to the origin).
class dragView : NSView, NSDraggingDestination {
required init(coder: NSCoder) {
super.init(coder: coder)
}
override init(frame: NSRect) {
super.init(frame: frame)
let types = [NSFilenamesPboardType, NSURLPboardType]
registerForDraggedTypes(types)
}
override func drawRect(dirtyRect: NSRect) {
super.drawRect(dirtyRect)
NSColor.whiteColor().set()
NSRectFill(dirtyRect)
}
override func draggingEntered(sender: NSDraggingInfo!) -> NSDragOperation {
return NSDragOperation.Copy
}
override func draggingUpdated(sender: NSDraggingInfo!) -> NSDragOperation {
return NSDragOperation.Copy
}
override func performDragOperation(sender: NSDraggingInfo!) -> Bool {
let pboard: NSPasteboard = sender.draggingPasteboard()
let array : [String] = pboard.propertyListForType(String(NSFilenamesPboardType)) as [String]
for item in array
{
...
What am I missing here?

Answer 1

Your code doesn't work cause you must register dragged type into init(coder:) function.
This code works fine in Swift 3
import Cocoa
class DropView : NSView {
required init?(coder: NSCoder) {
super.init(coder: coder)
let types = [NSFilenamesPboardType, NSURLPboardType]
register(forDraggedTypes: types)
self.wantsLayer = true
self.layer?.backgroundColor = NSColor.white.cgColor
}
override func draw(_ dirtyRect: NSRect) {
super.draw(dirtyRect)
// Drawing code here.
}
override func draggingEntered(_ sender: NSDraggingInfo) -> NSDragOperation {
return .copy
}
override func performDragOperation(_ sender: NSDraggingInfo) -> Bool {
guard let pasteboard = sender.draggingPasteboard().propertyList(forType: "NSFilenamesPboardType") as? NSArray,
let path = pasteboard[0] as? String
else { return false }
//GET YOUR FILE PATH !!
Swift.print("FilePath: \(path)")
return true
}
}
A more usefull example here