Kuidas süsteemis toimub Ressursside haldamine Reference andmetüübi jaoks?

In iOS, resource management for reference data types (such as classes) is performed using automatic reference counting (ARC). Each object maintains a reference count, which increases when a new reference to the object is created and decreases when a reference is removed. When the count reaches zero, the object is automatically released from memory.

Example:

class MyClass {
    var value: Int
    init(value: Int) {
        self.value = value
    }
}

var obj1: MyClass? = MyClass(value: 10) // reference count = 1
var obj2 = obj1 // reference count = 2
obj1 = nil // reference count = 1
obj2 = nil // reference count = 0, object is released

This way, ARC helps efficiently manage memory without the need to manually call resource release functions.