[Reading Notes] iOS-garbage collection, ios-garbage collection

[Reading Notes] iOS-garbage collection, ios-garbage collection

Objective-C is an inherited garbage collector. Compared with objects that have existed for a period of time, newly created objects are more likely to be treated as garbage. The garbage collector regularly checks variables and objects and pointers between them. When no variable points to an object, the object is considered as the garbage to be discarded. The worst thing is to keep a pointer to an object that is no longer in use. Therefore, if you point to an object in an instance variable, you must set the instance variable value to nil at a certain time, to cancel the reference to this object and make the Garbage Collector know that this object can be cleared.

 

References: Objective-C basic tutorial