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POviewwillappear and viewdidappear not called
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copied!<p>this question is very frequent, but I am not able to solve it with any answers available.</p> <p>I am working on iOS 5.1. My navigation controller is one tab amongst tab bar view controllers. There's a tableview, in which selecting of a row pushes new view controllers.</p> <p>This problem occurs Only on selecting of the second row and only sometimes. It's not regular. The Pushed view comes blank - <code>viewWillAppear</code>/<code>viewDidAppear</code> are not being called. On clicking the back button of the navigation bar - the root view's <code>viewWillAppear</code>/<code>viewDidAppear</code> are also not being called, making it blank.</p> <p>I am pushing the view on select of first row/second row in exactly the same way. But the problem occurs only on the second row.</p> <pre><code>- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{ switch (indexPath.row) { case 0: AViewController *aObj = [[AViewController alloc] init]; aObj.homeObj = self; [self.navigationController pushViewController:aObj animated:YES]; [aObj release]; break; case 1: BViewController *bVCObj = [[BViewController alloc] init]; bVCObj.homeObj = self; [self.navigationController pushViewController:bVCObj animated:YES]; [bVCObj release]; break; default: break; } [tableView deselectRowAtIndexPath:indexPath animated:YES]; } </code></pre> <p>I have tried <a href="https://stackoverflow.com/questions/4289617/why-isnt-viewwilldisappear-or-viewdidappear-being-called?rq=1">this</a> and <a href="https://stackoverflow.com/questions/3560669/viewwillappear-viewdidappear-not-being-called-not-firing">this</a> but in vain.</p> <ol> <li><p><code>viewDidLoad</code> is being called on pushing the <code>BViewController</code>, However, <code>viewWillAppear</code> and <code>viewDidAppear</code> is not being called. Following is my <code>viewDidLoad</code>:</p> <pre><code>- (void)viewDidLoad { [super viewDidLoad]; self.view.backgroundColor = [UIColor blackColor]; NSLog(@"nav stack: %@", [self.navigationController viewControllers]); NSLog(@"nav stack: %@", [[self.navigationController visibleViewController] description]); //some initialization and call of methods } </code></pre></li> <li><p>It's not regular. Sometimes I get this scenario, and this continues until I close the app from the background and restart it. But sometimes it works just fine. I am just pushing my view controller to the nab stack.</p></li> <li><p>As I mentioned in the comment, It's a regular navigation controller in tab bar controller.</p></li> </ol>

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