В чем заключается задача использования слабых и несобственнических ссылок в управлении памятью?

Weak and unowned references are used to prevent retain cycles in memory, which can lead to leaks.

• Weak references do not increase the reference count of an object and are automatically set to nil when the object is deallocated. This is useful when a reference might become invalid, and you want to avoid accessing deallocated memory.

• Unowned references also do not increase the reference count, but they assume that the object will exist for the lifetime of the reference. If the object is deallocated, accessing an unowned reference will cause a runtime error.

The purpose of these references is to manage the lifecycle of objects to avoid cyclic dependencies and memory leaks, while maintaining correct access to objects.