Objective C iVars, setters & getters

# AViewController.h
@interface AViewController : UIViewController  
{
}
@property(readwrite, retain) NSString *aString;
@property(readwrite, assign, getter=isReady) BOOL ready;


# AViewController.m
@implementation AViewController
@synthesize aString = _aString;

- (void)viewDidLoad 
{
  # By doing this you avoid many of the headaches and pitfalls of 
  # managing memory.
  self.aString = @"A string that is now retained";
  self.ready   = NO;
}

- (void)someAction
{
  if (self.isReady)
    NSLog(self.aString);
}

- (void)dealloc
{
  self.aString = nil, [_aString release];
  [super dealloc];
}

@end