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We can use MVVM to resolve this issue. The Model-View-ViewModel, or MVVM pattern as it’s commonly known, is a UI design pattern. VM takes all logic about preparing model data for UI from VC. Example: You have got model object with some fields, you want to format some of them, make calculation and combine them. In MVC case all that logic located in ...


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If you need to consume REST-full API try a look to RestKit.framework. It provides a powerful object mapping engine that seamlessly integrates with Core Data and a simple set of networking primitives for mapping HTTP requests and responses built on top of AFNetworking.


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To start with if you really need to shave those extra few nanoseconds off your Utils C++ functions (potentially inlined) are probably the fastest thing on offer to you. As to the question of whether class methods or singleton instance methods are more performant I will not claim to know for sure but a quick look at the objective-c runtime shipped with OSX ...



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