UINavigationItem hidesBackButton example in Objective C (iOS).

UINavigationItem hidesBackButton

A Boolean value that determines whether the back button is hidden.

@property(nonatomic, assign) BOOL hidesBackButton

Discussion of [UINavigationItem hidesBackButton]
When set to YES, the back button is hidden when this navigation item is the top item. This is true regardless of the value in the leftItemsSupplementBackButton property. When set to NO, the back button is shown if it is still present. (It can be replaced by values in either the leftBarButtonItem or leftBarButtonItems properties.) The default value is NO.

UINavigationItem hidesBackButton example.

@implementation BVC

// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {
    [super viewDidLoad];
    self.navigationItem.title = @"I am B";
}

- (void) viewWillAppear:(BOOL)animated{
    self.navigationItem.hidesBackButton = YES;
}

- (IBAction)pushB:(UIButton *)sender{
    CVC *cvc = [[CVC alloc] initWithNibName:@"CVC" bundle:nil];
    [self.navigationController pushViewController:cvc animated:YES];
    [cvc release];
}
@end

@implementation CVC

- (void) viewWillAppear:(BOOL)animated{
    self.navigationItem.hidesBackButton = NO;
}
@end

Example of [UINavigationItem hidesBackButton].

UIBarButtonItem *rightButton = [[UIBarButtonItem alloc] initWithTitle:@"Done"
    style:UIBarButtonItemStyleDone target:nil action:nil];
UINavigationItem *item = [[UINavigationItem alloc] initWithTitle:@"Title"];
item.rightBarButtonItem = rightButton;
item.hidesBackButton = YES;
[bar pushNavigationItem:item animated:NO];
[rightButton release];
[item release];

UINavigationItem hidesBackButton example.

- (void)loadView
{
    self.view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 240)];
    self.view.backgroundColor = [UIColor greenColor];
    self.title = @"SecondVC";

    self.navigationItem.hidesBackButton = YES;
    UIBarButtonItem *leftBtn = [[UIBarButtonItem alloc] initWithTitle:@"FirstLevel" style:UIBarButtonItemStyleBordered target:self action:@selector(leftBtnSelected:)];
    self.navigationItem.leftBarButtonItem = leftBtn;
}

- (void) leftBtnSelected:(id)sender
{
    [self.navigationController popViewControllerAnimated:YES];
}

End of UINavigationItem hidesBackButton example article.