How can my OS X app accept drag-and-drop of picture files from Desk in Cocoa? - swift

Question

I got an error when I drag files to my macOS app,
[sandbox] Failed to get a sandbox extension，when i set App Sandboxvalue boolean no,it is ok,but i want put my app to appstore,I must set App Sandbox YES, how can I do?
class FYOpenDragFileView: NSView{
override func draggingEnded(_ sender: NSDraggingInfo) {
print("松手了")
setupWithActive(active: false)
}
override func draggingExited(_ sender: NSDraggingInfo?) {
isDraging = false
setupWithActive(active: false)
print("draggingExited 进去又出来")
}
override func updateDraggingItemsForDrag(_ sender: NSDraggingInfo?) {
guard let next = delegate else {
return;
}
next.fileDraging()
print("更新拖动文件")
}
override func performDragOperation(_ sender: NSDraggingInfo) -> Bool {
guard let items = sender.draggingPasteboard.pasteboardItems else{
return false
}
var datas = [Data]()
for i in 0..<items.count{
let item = items[i] .string(forType: .fileURL)
if item != nil {
// this have an error
//[sandbox] Failed to get a sandbox extension
let da = try? Data(contentsOf: URL(string: item!)!)
guard let next = da else {
continue
}
datas.append(next)
}
}
QiniuUploadManger.uploadImage(nil, data: datas)
return true
}
}

Answer 1

With sandboxing, you'll have to set the appropriate "entitlements" for your app to receive drag-&-dropped files, which is probably why you're getting this error.
The entitlements file should already have been generated for you when you enabled Sandboxing. See this Apple documentation for details.