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POBack button does not appear in navigation bar until you rotate
 

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  1. POBack button does not appear in navigation bar until you rotate
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    <p>I have three view controllers: <code>A</code> -> <code>B</code> -> <code>C</code> managed by a navigation controller. <code>A</code> is a transient view controller. It asks the server for something. If the server says everyhing is OK, then <code>A</code> pushes <code>B</code> onto the stack. <code>B</code> must hide the back button because I don't want users to manually go back to <code>A</code>. </p> <pre><code>// B view controller - (void)viewDidLoad { [super viewDidLoad]; self.navigationItem.hidesBackButton = YES; self.title = @"B"; } </code></pre> <p><code>B</code> then pushes <code>C</code> onto the stack when the user taps a table cell.</p> <pre><code>// B view controller - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { C *c = [[C alloc] initWithStyle:UITableViewStyleGrouped ]; [self.navigationController pushViewController:c animated:YES ]; [c release]; } </code></pre> <p>.</p> <pre><code>// C view controller - (void) viewDidLoad { [super viewDidLoad]; self.navigationItem.hidesBackButton = NO; self.title = @"C"; } </code></pre> <p>If all goes well, the flow should look like this:</p> <pre><code>------------- ------------- ------------- |_____A_____| |_____B ____| | &lt;B|__ C___| | | =&gt; | | =&gt; | | | loading...| | cells | | detail | | | | | | | ------------- ------------- ----------- </code></pre> <p>For some reason, <code>C</code> does not show a back button to go back to <code>B</code> <em>until</em> I rotate the device. Once rotated, the back button appears in all orientations. The problem seems to stem from <code>B</code> hiding the back button and <code>C</code> trying to reveal it again, because If I don't let <code>B</code> hide it, I don't have this problem. So how do I get C to show the back button without forcing the user to rotate the device like a monkey?</p> <h1>Update</h1> <ul> <li>Broken on two different Verizon iPhone 4 both on iOS 4.2.10</li> <li>Fine on AT&amp;T iPhone 3GS on iOS 5.0 </li> <li>Fine on AT&amp;T iPhone 4 on iOS 4.3</li> </ul>
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    1. COWhy leave A on the stack, then? If you don't ever want to go back to A, you might want to take it out of the navigation controller.
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      1. USOwen Pierce
    2. COsounds like the drawing routine for the navigation bar is not called for some reason, and turning the device is probably triggering the drawing. You could try calling [super viewDidLoad] after setting the hideBackButton property, or maybe re-showing the navigation bar in viewDidLoad with [self.navigationController setNavigationBarHidden:false animated:false] - maybe that triggers the drawing, too.
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      1. USTheEye
    3. COI keep A on the stack because sometimes I like to pop to the root and run A again.
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      1. USJoJo
 

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