Question

I’ve done this many times with code that is exactly the same, but for some reason it isn’t working today.

 ExampleViewController1 *exampleView = [[ExampleViewController1 alloc] initWithNibName:@"ExampleViewController1" bundle:nil];
 [exampleView setProjectName:[[self.projectListArray objectAtIndex:indexPath.row] objectForKey:@"name"]];
 NSLog(@"%@", [[self.projectListArray objectAtIndex:indexPath.row] objectForKey:@"name"]);
 XAppDelegate.stackController pushViewController:exampleView fromViewController:nil animated:YES]

My NSLog prints out appropriately.

My ExampleViewController1.h file declared like:

@property(nonatomic, strong) NSString *projectName; 

I then do this code in ExampleViewController1.m‘s

 -(void)viewDidLoad {
     NSLog(@"%@", self.projectName);
     self.projectNameLabel.text = self.projectName;
     [super viewDidLoad];
 }

The results of my NSLogs are curious. The NSLog from my viewDidLoad appears to be getting called before my other one:

 2012-04-22 10:59:41.462 StackedViewKit[43799:f803] (null)
 2012-04-22 10:59:41.463 StackedViewKit[43799:f803] NewTest

I have confirmed that the (null) value there is from NSLog(@"%@", self.projectName);, but that should be the second NSLog called…I can’t figure out why it is coming through first.

Someone requested this code:

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
   if ((self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil])) {

    // random color
    self.view.backgroundColor = [UIColor colorWithRed:((float)rand())/RAND_MAX green:((float)rand())/RAND_MAX blue:((float)rand())/RAND_MAX alpha:1.0];
   }
  return self;
}

Answer 1

As I expected, the problem is that you are trying to access self.view inside the initialization method. So move the line self.view.backgroundColor = ... to the viewDidLoad method:

- (void)viewDidLoad
{
    [super viewDidLoad];
    NSLog(@"%@", self.projectName);
    self.projectNameLabel.text = self.projectName;
    self.view.backgroundColor = [UIColor colorWithRed:((float)rand())/RAND_MAX green:((float)rand())/RAND_MAX blue:((float)rand())/RAND_MAX alpha:1.0];
}

---

In fact, the documentation of the view property says:

If you access this property and its value is currently nil, the view controller automatically calls the loadView method and returns the resulting view.

So when you call self.view in the initialization method, the view controller will have to load the view (from the nib or using the loadView method). And that’s why viewDidLoad is called.