Self and super

Question

Hi developers,
I would like to know if anyone knows of some good site(s) and/or book(s) that explain(s) the meaning of SELF and SUPER (with respect to Objective-C) as I myself am a newbie to the superset of the C language and find it confusing to understand what SELF and SUPER do.
Cheers
PS: I also posted the same message on the other forum (S/W Dev 101)

Answer 1

Firstly, thanks for the replies so far
Below are the header and implementation files for "MyViewController";
Questions:
1) In the instance method "viewDidUnload", why is "self" used and not in "dealloc" or for ToggleIsOn in the buttonPressed method ?
I understand what you are saying about "super" in the "dealloc" method.
2) Is it necessary to set the outlets to nil in the "dealloc" method ?
3) Are "viewDidUnload" and "dealloc" correct programmatically speaking ?
//-- MyViewController.h --
#import <UIKit/UIKit.h>
@interface MyViewController : UIViewController
IBOutlet UIButton *myButton;
IBOutlet UILabel *display;
BOOL ToggleIsOn;
float delayTime;
@property (nonatomic, retain) IBOutlet UIButton *myButton;
@property (nonatomic, retain) IBOutlet UILabel *display;
-(IBAction)buttonPressed:(UIButton *)sender;
@end
//-- MyViewController.m --
#import "MyViewController.h"
@implementation MyViewController
@synthesize myButton, display;
-(IBAction)buttonPressed:(UIButton *)sender
UIButton *button = sender;
ToggleIsOn = !ToggleIsOn;
NSLog(@"Button Pressed!");
NSLog(@"Button Tag is %i", button.tag);
NSLog(@"Button State is %i", button.state);
NSLog(@"ToggleIsOn = %i", ToggleIsOn);
display.text = (ToggleIsOn) ? @"Toggle ON" : @"Toggle OFF";
// rest of instance method...
-(void)viewDidUnload
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
self.myButton = nil;
self.display = nil;
-(void)dealloc
[[myButton release]];
myButton = nil;
[[display release]];
display = nil;
[[super dealloc]];
@end