storyboard UIViewController init

Assuming you have storyboard, go to storyboard and give your VC an identifier (inspector), then do:

UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil]; UIViewController *vc = [storyboard instantiateViewControllerWithIdentifier:@"IDENTIFIER"]; [self.navigationController pushViewController:vc animated:YES];

Assuming you have a xib file you want to do:

UIViewController *vc = [[UIViewController alloc] initWithNibName:@"NIBNAME" bundle:nil]; [self.navigationController pushViewController:vc animated:YES];
Without a xib file:

UIViewController *vc = [[UIViewController alloc] init]; [self.navigationController pushViewController:vc animated:YES];

从xib中加载UIview
 

NSArray *niblets = [[NSBundle mainBundle] loadNibNamed:@"sample" owner:self options:NULL];
for (id theObject in niblets)
    {
        if ([theObject isKindOfClass:[UIViewController class]])
            [self.navigationController pushViewController:theObject animated:YES];
    }
或者[niblets objectindex:0]