Max Bhuiyan

@ijinmao are you sure you are calling the dismiss method on main thread? if your response completion block is in the background thread, any update ui is uncertain. may be...

I think it'll be easier if you review commit by commit, I'll be converting more classes and adding more commits

Swift 4 has changed the String class and how unicode characters are handled. Will start again

@torifat I'd like to contribute with this migration, I'll create a pull request once I have a compilable version. In the mean time, I have a few questions(more like decisions)...

Swift is available from macOS 10.9 The current deployment target is 10.7. Ok if we bump the target to 10.9?