set NSTimer time to NavigationBar label

Question

I want to display remaining time from my NSTimer in NavigationItem title, that's why I can't create outlet for it.
My code is from this question NSTimer problem :

@interface MyController : UIViewController
{
UILabel * theLabel;

@private
NSTimer * countdownTimer;
NSUInteger remainingTicks;
}

@property (nonatomic, retain) IBOutlet UILabel * theLabel;

-(IBAction)doCountdown: (id)sender;

-(void)handleTimerTick;

-(void)updateLabel;

@end

@implementation MyController
@synthesize theLabel;

-(IBAction)doCountdown: (id)sender
{
  if (countdownTimer)
  return;


remainingTicks = 60;
[self updateLabel];

countdownTimer = [NSTimer scheduledTimerWithTimeInterval: 1.0 target: self selector: @selector(handleTimerTick) userInfo: nil repeats: YES];
}

-(void)handleTimerTick
{
remainingTicks--;
[self updateLabel];

if (remainingTicks <= 0) {
  [countdownTimer invalidate];
  countdownTimer = nil;
  }
}

-(void)updateLabel
{
  theLabel.text = [[NSNumber numberWithUnsignedInt: remainingTicks] stringValue];
}


@end

So, how can I put theLabel.text to label in NavigationBar ?
I call method doCountdown in viewDidLoad :

[self doCountdown:nil];

Where is my fault? If I try to watch theLabel, NSLog says (null) .

UPD: And another stupid question. If I try to move label with NSTimer to the right, like here:

[self.navigationItem setTitle:@"Экзамен"]; self.theLabel = [[UILabel alloc] init]; [self doCountdown:nil]; UILabel *yourLabel = [[UILabel alloc]initWithFrame:CGRectMake(260,6,55,32)]; yourLabel.text = self.theLabel.text; [self.navigationController.navigationBar addSubview:yourLabel]; my timer doesn't start, it shows initial time at label and nothing more.

Answer 1

The label is null because you don't create it anywhere.

In your viewDidLoad you should create it and add to navigation item's title view, eg like this:

self.theLabel = [[[UILabel alloc] initWithFrame:CGRectMake(0, 0, 100, 30)] autorelease];
self.navigationItem.titleView = self.theLabel;

Don't forget to release theLabel in dealloc.