Can we disabled the navigation controller of leftBarButtonItem that is back button of the view controller in iPhone?

Question

Hi Guys,

I want to disabled the default back button of navigation controller

self.navigationItem.rightBarButtonItem.enabled = NO; self.navigationItem.leftBarButtonItem.enabled = NO;// not working how can we disabled here.

I have done it with manually shown below, But Is there any property to disabled the default back button with just single line?

backButton = [[UIButton alloc] initWithFrame:CGRectMake(5, 5, 100, 30)]; [backButton setBackgroundImage:[UIImage imageNamed:@"backbutton_100.png"] forState:UIControlStateNormal]; [backButton addTarget:self action:@selector(backAction:) forControlEvents:UIControlEventTouchUpInside]; [backButton setTitle:@" All Customers" forState:UIControlStateNormal]; backButton.titleLabel.font = [UIFont boldSystemFontOfSize:12]; [buttonView addSubview:backButton];

    UIBarButtonItem* leftButton = [[UIBarButtonItem alloc] initWithCustomView:buttonView];
    self.navigationItem.leftBarButtonItem = leftButton;
    [leftButton release];

self.navigationItem.leftBarButtonItem.enabled = NO;// now it is working.

Answer 1

Call [self.navigationItem setHidesBackButton:YES]; for the view controller you do not want to have the back button. Then set the leftBarButtonItem as normal.

Answer 2

Using "hidesBackButton=YES" is really not an elegant solution, cause it HIDES the button which is not what we want. An acceptable work-around would be adding a UILabel to the window just over the back button at least disabling the touches on the button.

Add this method to your AppDelegate class:

- (void) disableLeftBarButtonItemOnNavbar:(BOOL)disable
{
    static UILabel *l = nil;

    if (disable) {
        if (l != nil)
            return;
        l = [[UILabel alloc] initWithFrame:CGRectMake(0, 20, 160, 44)];
        l.backgroundColor = [UIColor clearColor];
        l.userInteractionEnabled = YES;
        [self.window addSubview:l];
    }
    else {
        if (l == nil)
            return;
        [l removeFromSuperview];
        [l release];
        l = nil;
    }
}

You can call it like this from any view controller to disable:

MyAppDelegate *appDeleg = (MyAppDelegate *) [[UIApplication sharedApplication] delegate];
[appDeleg disableLeftBarButtonItemOnNavbar:YES];

To enable:

MyAppDelegate *appDeleg = (MyAppDelegate *) [[UIApplication sharedApplication] delegate];
[appDeleg disableLeftBarButtonItemOnNavbar:NO];