how i am get base 64 file data ?

Downloading a file using the Dropbox API will give you the raw bytes of the file. If you want to then convert that to Base64, you'll have to do that yourself. Here's an example I found by searching for "ios base64": http://iosdevelopertips.com/core-services/encode-decode-using-base64.html.

Hello Steave ,
how i download a file from dropbox?

That depends on which SDK you're using, but the tutorial for that SDK should show you how to do that. E.g. the "Downloading files" section of https://www.dropbox.com/developers-v1/core/start/ios or the "Try some API requests" section of https://www.dropbox.com/developers/documentation/swift#tutorial.

hello Steve

i want to show my pdf,doc file and created any folder inside dropbox.here i got list of pdf file and doc file but i does not get any solution how to show folder.plz steve help me.

this code i am using for showing doc , pdf file and i want show folder.which extension i use for showing folder?

 NSArray* validExtensions = [NSArray arrayWithObjects:@"pdf", @"docx",@"doc", nil];

This question seems unrelated to the original question in this thread. Please create a new post to ask a new question.

ok.. thank u