Question

I began from a tutorial example that had a UIViewController connected to a nib, but now i’ve decided to do it all programmatically. Consequently, I deleted the nib but without knowing how to implement my controller.

I did something like this:

EventsDetailController *myChild = [[EventsDetailController alloc] init];
[self.navigationController pushViewController:myChild animated:YES];

However, it crashes when I click the specific cell.

Do I have to initWith something? Before when I had a nib it was initWithNib

#import <UIKit/UIKit.h>

@interface EventsDetailController : UIViewController {

    NSString *message;
}

@property (nonatomic, copy) NSString *message;

@end



#import "EventsDetailController.h"


@implementation EventsDetailController
@synthesize message;


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

}

-(void)viewDidLoad{


    UILabel *theMsg = [[UILabel alloc] initWithFrame:CGRectMake(0,0,200,30)];

    theMsg.text = @"hello";

    [theMsg release];
    [super viewDidLoad];
}

-(void)viewDidUnload{

    self.message = nil;
    [super viewDidUnload];

}


-(void)dealloc{


    [message release];
    [super dealloc];

}
@end

Perhaps, I’ll start from scratch, I think it is still looking for the nib I deleted.

Answer 1

I’m assuming that you have the app delegate’s window.rootViewController set to a NavigationController instance, and that instance was created with a initWithRootViewController, as you mentioned that you’re getting to the point where it crashes when you click on a cell.

Looking at the added code, the only thing I see that’s strange is in the ‘veiwDidLoad’ method – you alloc and release ‘theMsg’, but don’t use it. I’m assuming you’ve cut out some code for brevity.

I ended up starting from scratch when I went away from .nib files (about 5 minutes after starting my first iPhone app). I would run with that, adding in your functionality a little at a time.