touchesBegan doesnt get detected - iphone

Question

I have a viewcontroller like the following. But the touchsBegan doestnt get detected.
Can anyone plz tell me what is wrong.
- (id)init
{
if (self = [super init])
self.view = [[[UIView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]] autorelease];
return self;
}
-(void) viewWillAppear:(BOOL)animated
{
overlay = [[[UIImageView alloc] initWithImage:[UIImage imageNamed:#"overlay.png"]] autorelease];
[self.view addSubview:overlay];
}
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
// Detect touch anywhere
UITouch *touch = [touches anyObject];
// Where is the point touched
CGPoint point = [touch locationInView:self.view];
NSLog(#"pointx: %f pointy:%f", point.x, point.y);
// Was a tab touched, if so, which one...
if (CGRectContainsPoint(CGRectMake(1, 440, 106, 40), point))
NSLog(#"tab 1 touched");
else if (CGRectContainsPoint(CGRectMake(107, 440, 106, 40), point))
NSLog(#"tab 2 touched");
else if (CGRectContainsPoint(CGRectMake(214, 440, 106, 40), point))
NSLog(#"tab 3 touched");
}

Answer 1

Touches are only called on UIViews. This means you have to subclass UIView and put your touchesBegan:withEvent: code in this subclass. You're using the code inside an UIViewController and this doesn't get any touches itself because it's not an object on screen. A controller is just for the application logic behind a view.

Answer 2

As chriB said touches are detected only on views and as u access it in a controller its not detected.
also FYI, the touches wont be detected on any views you add over the base view.
ie: if u have a view and u add a scroll view or a table view over it, then the touches wont be detected over this added regions. same goes for buttons, textfields etc. Touch is detected only wen its done exactly on the base view.