无法从另一个viewcontroller转到第一个标签栏

Question

无法从另一个viewcontroller转到第一个标签栏。 tabbar在appdelegate.Please帮助中声明。还有其他办法吗？ 无论如何我想去第一个标签栏。

- (IBAction)createThread:(id)sender {


BOOL isNetworkAvailable=[[IXNetworkDataManager sharedNetworkDataManager] checkForNetworkConnection];

if(isNetworkAvailable)
{

    NSDate *replyDateInfo = [NSDate date];

    NSString *loginUser=[[NSUserDefaults standardUserDefaults] valueForKey:@"currentUser"];



        UserInfo *info=[[IXDataBaseManager sharedNetworkDataManager] retrieveCurrentUserDetailsForUser:loginUser];
        if(info!=nil)
        {

            [[IXNetworkDataManager sharedNetworkDataManager] createThreadWithDetails:self.selectedMessageArray];

   [self manageThreadWithDetails:self.selectedMessageArray];

AppDelegate *sharedDelegate=(AppDelegate*)[UIApplication sharedApplication].delegate;
[sharedDelegate.tabBarController setSelectedIndex:0];

//[self dismissViewControllerAnimated:YES completion: nil];




 }