Broken links have been noted and will be fixed - initial answer on an ObjectiveC SDK is "yes there will be one, its being worked on, eta a few months away" to paraphrase.
If you search the net, many conversations have been about a much needed v2 SDK for Objective-C but with no resolution.
It would be a giant misstep if Dropbox did not release a v2 version of their SDK for Objective C.
Dropbox, please make this a priority and commit. If this commitment takes place it should be made known in their blog way prior to the June 2017 discontinuation of the v1 routines.
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