在Storyboard中以编程方式呈现ViewController

Question

我正在尝试以编程方式在storyboard中呈现viewcontroller，我正在使用下面提到的代码，但它不起作用，不给我任何回复......

- (void)buttonPressed
{
NSLog(@"called");

UIStoryboard *sb = [UIStoryboard storyboardWithName:@"MainStoryboard_iPhone" bundle:nil];

UINavigationController *vc = [sb instantiateViewControllerWithIdentifier:@"123"];

vc.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;

[self.navigationController presentModalViewController:vc animated:YES];
}

我在这里缺少什么？

Answer 1

NSLog(@"called");

    UIStoryboard *sb = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil];

    UINavigationController *vc = [sb instantiateInitialViewController];

    vc.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
    [self presentViewController:vc animated:YES completion:nil];