ref – http://www.thomashanning.com/retain-cycles-weak-unowned-swift/ By default, each reference, that points to an instance of a class, is a so-called strong reference. As long as there is at least one strong reference pointing to an instance, this instance will not be deallocated. When there’s no strong reference pointing to that instance left, the instance will be deallocated … Continue reading Retain cycles, weak, unowned in Swift