Observing Yourself in Cocoa

Question

In Cocoa, addObserver:forKeyPath:options:context:"neither the receiver nor anObserver" is saved. Therefore, I assume that self-observation is permitted; that is, it is absolutely true to do something like

[self addObserver:self forKeyPath...]

Until you forget to unregister selfas an observer as the first thing to do in dealloc.

Is this assumption correct?

Answer 1

Yes, in fact there is no reason why you cannot observe yourself. But, as you said, like any KVO observation, be sure to remove yourself as an observer before you free yourself.

, , - , . , . KVO , , .

Answer 2

, . :

//.h
...
@property(readwrite, retain, setter=setMyPropertySynth:) id myProperty;
-(void)setMyProperty:(id)newValue;
....


//.m
...
@synthesize myProperty;

-(void)setMyProperty:(id)newValue
{
    //add code here

    [self setMyPropertySynth:newValue];

    //add more code here
}
...

Answer 3

-dealloc. ? , , ; -dealloc . -dealloc -finalize , .