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I want to pass datum from view controller to view controller via tab bar controller. I mean, my storyboard is like this. View Controller → Tab Bar Controller → VC1/VC2/VC3 For the purpose of this, I tried to use PrepareforSegue , but it's failed. The code is here. (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{ NSIndexPath *selectedIndexPath = [self.tableView indexPathForSelectedRow]; friendsDetailViewController* vc = [[friendsDetailViewController alloc] init]; vc = (friendsDetailViewController*)[segue destinationViewController]; vc.candidateid = [[NSString alloc] init]; vc.candidateid = [candidateid objectAtIndex:selectedIndexPath.row]; Though I was trying to pass data from VC to VC1, SIGABT happened on the last line. Update: I've got figured out how. Here is the script: friendsDetailViewController* vc = [[friendsDetailViewController alloc] init]; UITabBarController* tbc = [segue destinationViewController]; vc = (friendsDetailViewController*)[[tbc customizableViewControllers] objectAtIndex:0]; Firstly, I have to attach Tab Bar Controller. Secondly, retrieve each View Controller's pointer. You can select by using objectIndex.

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