Before we wrap up this chapter, let's look at offering the user a way to choose the location in which a file is to be saved, and to load a file from any location in the file hierarchy.
This goes beyond what is included in the Foundation framework; we need Cocoa, so we need to modify the CustomFileManager import statement as follows:
import Cocoa
Creating the Open dialog box could hardly be easier. Add the following method to the CustomFileManager class, using a new extension:
extension CustomFileManager
{
func openFile() -> URL?
{
let myFileDialog = NSOpenPanel()
myFileDialog.runModal()
return myFileDialog.url
}
}
As you can see, this returns the URL of the file chosen by the user.
The dialog box should look familiar:
Note that there is no New Folder button, because we are searching for a file, not saving one. Also note that the Open button...
