Swift uses ARC (Automatic Reference Counting) similar to Objective-C to track and manage application memory. In most cases, we don’t need to bother about memory management by ourselves, the swift compiler will take care of it. But there are some cases where we need to deal with it by ourselves. I am going to discuss some of the common cases from those.
We all have been through situations, where we had to create classes with multiple constructors or constructor with a lot of dependencies (parameters). These classes tend to get bloated quickly with the over used constructor methods and too many parameters and starts messing with the default properties values. Whenever you find yourself into this situation you; my friend; have been trapped by a notorious anti-pattern called Telescopic Constructors or, Telescopic Initializers. The initial intention of this pattern was to simplify the process of working with classes with a lot of initializer parameters.
In iOS we always end up defining our instance variables as @property (strong) or @property(weak). But what does strong and weak mean, and when to use which one?
In cocoa, an objects memory is managed via a system called retain count. When an object is initialized, its retain count is increased by 1 from zero. And each time it is strongly referenced by someone, the retain count keeps increasing by 1. In ARC (a compile time feature of Apple’s version of automated memory management, acronym of Automatic Reference Counting), it only frees up memory for objects when there are zero strong references to them, or simply put, the retain count is zero.
Now a days it is fairly common to use CocoaPods to your project as the dependency manager for your iOS and MacOs projects. I have been using it for quite some time now; and to my utter delight, oh boy, I am glad I got to know how to use this masterpiece!
Now to a fairly uncommon scenario, what if you want to create your own pod?