Facebook iOS SDK engages users in social applications. With this SDK, users can share messages from an app to Facebook, they can reach a target audience using the right ads, and increase visibility when a consumer is redirected to the AppleApp store. Some examples of applications developed with this SDK include Friend Smash and Swag Shop.
When it comes to interacting with the over800 social APIs, it's not just about your friend's data. It's also about your own data. The Personal Data Revolution is about making that data available to you, which is where the APIs come in.
There are a number of ways of delivering data in real-time but until recently it has looked like PubSubHubbub, with the backing of Google, was going to be the preferred method. However, the past couple of weeks have seen a couple of interesting developments which could indicate that the developer community may actually prefer HTTP Streaming.
After originally launching v4 of the Facebook SDK in 2015, Facebook has now announced the end of support date for v3. Starting June 1, 2017, Facebook will no longer support v3. Older versions will continue to operate; however, developers will lose support and access to new features.