iPhone UIViewController init method not being called

Question

Hi folks, I am very new to iPhone programming and am running into a little bit of weirdness. For the following class, the init method just never gets called -- I have an NSLog function which should tell me when init is executed. Here's the relevant code:

@interface MyViewController : UIViewController {
}
@end

@implementation MyViewController
- (id) init
{
    NSLog(@"init invoked");
    return self;
}
@end

Any ideas as to what I am doing wrong -- if anything? Hopefully I provided enough information.

Thanks.

Answer 1

Is the view coming up? Use these methods for additional initialization:

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
    //...
}

// Implement viewDidLoad to do additional setup after loading the view.
- (void)viewDidLoad {   
    [super viewDidLoad];
    //..
}

Answer 2

You are probably creating your view controller from a NIB file. So, instead of calling "init" message, this is the one creator message being called:

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
    if (self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]) {
        // Custom initialization
    }
    return self;
}

Try if that is the one being called. What Sean said is true. You could use those messages to accomplish similar things.

Good luck.

Answer 3

Refer 'designated initializer' in reference document too.

Answer 4

But, a UI component has sometimes severals init* methods, do we need to override all these methods in order to do some init. stuff?