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CoreData is a framework for managing object graphs and storing them on disk. It is much more than just offering a persistent storage, therefore the rich API it provides, is meant to be used app-wide. In this blog post we'll look into how to initialise CoreData storage, store some data in it and fetching it. …
When building iOS apps it is important to think about how to structure an app and how to connect all the pieces. A typical app has multiple interaction flows and in this post I am going to represent a way of how to decouple views and how to navigate from one view to another using …
This is a second part of the first post about hashing data using SHA256. Here we will look into CCHmac (Hash-based Message Authentication Code) functions and see how to use it for creating authentication codes what can be used for data integrity checks and authentication of a message. Message authentication codes Hash-based message authentication code …
Continue reading "Using CCHmac for creating message authentication codes"
In this post we will look into how to add CommonCrypto to a Xcode project and how to generate hash using SHA256. Adding CommonCrypto as a module CommonCrypto library can be added in two ways: importing it in the Objective-C bridging header or by using module maps. The first option makes sense for projects having …
Continue reading "Hashing data using CommonCrypto and SHA256"
We will look into how to make a property observable using a separate class managing the observers. It is an alternative and simple way of observing property changes without using ReactiveSwift, Key-Value Observing or anything else similar. It can be an excellent glue between Model and View Model in MVVM or between View and Presenter …
Continue reading "Making a property observable from outer scope using generic class Observable"
