Question

我有一个包含四个UIViewController的UITabBarController，当我想调用viewDidAppear时，它不起作用。我不知道为什么这只发生在iOS 4.3上？

//
UINavigationController *nav3 = [[UINavigationController alloc] init];
SearchViewController *searchViewController = [[SearchViewController alloc] init];
searchViewController.context = context;

[nav3 pushViewController:searchViewController animated:NO];
[arrayViewController addObject:nav3];

[nav3 release]; [searchViewController release];

//
UINavigationController *nav4 = [[UINavigationController alloc] init];
FavorisViewController *favorisViewController = [[FavorisViewController alloc] init];
favorisViewController.context = context;

[nav4 pushViewController:favorisViewController animated:NO];
[arrayViewController addObject:nav4];

[nav4 release]; [favorisViewController release];

我最喜欢的UIViewController：

     #pragma mark - View lifecycle

     - (void)viewDidLoad
      {
         [super viewDidLoad];

          NSError *error;
          NSFetchRequest *fetch = [[NSFetchRequest alloc] init];
          fetch.entity = [NSEntityDescription entityForName:@"Businesses" inManagedObjectContext:context];
          fetchObject = [context executeFetchRequest:fetch error:&error];

         [fetch release];

        }

      - (void)viewDidAppear:(BOOL)animated
       {
          NSLog(@"test");
       }

Answer 1

请尝试使用UINavigationController方法initWithRootViewController:。例如，

FavorisViewController *favorisViewController = [[FavorisViewController alloc] init];
favorisViewController.context = context;
UINavigationController *nav4 = [[UINavigationController alloc] initWithRootViewController:favorisViewController];
[favorisViewController release];

请注意，仅仅因为视图被推入堆栈，并不意味着它是可见的。在您选择具有该视图的标签之前，不应调用viewDidAppear:。

当我在iOS 4.3中调用它时，ViewDidAppear不起作用？

1 个答案: