ios tab bar click to show modal view get a black screen

Question

Hi I want implement this animation effect(using storyboard), when user click a tab bar(say 2nd tab bar item), it displays the corresponding view like a modal view(display upwards to the screen)

My current method is delegate tab bar controller to tab bar and rewrite

-(void)tabBar:(UITabBar *)tabBar didSelectItem:(UITabBarItem *)item{
    NSLog(@"rawr");
    NSLog(@"inside tab bar did select, index is %d", self.selectedIndex);

    if (item == [self.tabBar.items objectAtIndex:1]) {
        //item.title = @"modal view";
        NSLog(@"going to promote as modal view");
        CBTab2ViewController* modalViewController = [[CBTab2ViewController alloc] init];
        [self presentViewController:modalViewController animated:YES completion:nil];
    }
}

The problem is, the view displayed is a black screen, any idea how to implement it correctly?

my source code can be found a link below: https://www.dropbox.com/s/6rd6ek59xf0yiq4/testtabbar.zip

Answer 1

Change the lines :

CBTab2ViewController* modalViewController = [[CBTab2ViewController alloc] init];
[self presentViewController:modalViewController animated:YES completion:nil];

To this one (incase your storyboard name is "MainStoryBoard"):

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

CBTab2ViewController * modalViewController = (MyViewController*)[mainStoryboard 
                        instantiateViewControllerWithIdentifier: @"CBTab2ViewController"];

[self presentViewController:modalViewController animated:YES completion:nil];