title: how can i get file from smb file server at my app iOS
body: <p>I am developing an app,I want to get file from shared folder,I used bonjour to find file server around me and I get the ip address and server type;
  now I want to get the shared file from these file server?how can I get these? I google it and I know to get this file I have to implement something like afp or smb ,then I can get file.
  but can somebody tell me exactly what should I do? and can somebody give me demo? I searched a smb demo "tango" at github,but its doesn't work.</p>