A new blog from Shannon Potter that focuses on technical topics around the Core Animation framework. CALayer documents tips, techniques, pitfalls, and opinions about Core Animation, with occasional posts about other related iOS graphics and media frameworks such as Core Image, SceneKit and Metal.
Use Swift to breathe new life into old Objective-C APIs. In this talk from try! Swift, Daniel Eggert gives an example using Core Data, showing how to make the code more readable and less error-prone by using protocols and protocol extensions.