Manual reference Counting in rules

Implementation of the Assign, retain, and copy three attributes when assigning a value to a property using the Set Value method

Self.property = newvalue;

The Assign feature would be this:

property = NewValue;

The retain feature would be like this

if (property!=0) {

[Property release];

property = [NewValue retain];

}

The feature of copy is this

if (property!=0) {

[Property release];

property = [newvalue copy];

}

If you want to keep an object from being destroyed you can use retain, and release is required after you have finished using the object.

Releasing a message to an object does not release the object, but is not destroyed until the object's reference count is 0. The system then sends a DEALLOC message to the object to free up memory.

There is no need to use an object in the method, but this object does have a return value that can send a autorelease message to this object to mark the object's deferred release, Autorelease does not affect the object's reference count.

Manual reference Counting in rules