Best way to add a UIViewController on top of another UIViewController

Question

What is the best way to add a UIViewController on top of a UIViewController which is already present on my iPhone. There are two ways I know of. But is there a better way? Which one of these is better, if not?

1. [self presentModalViewController:controller animated:NO];
2. [self.view addSubview:someController.view];

Answer 1

This depends on how you want to implement it. If you want to show the view controller and dismiss it using existing transitions, you can use presentModalViewController . But, if you want to show it with some custom animations, you can use addSubView . And again, it entirely depends on you.

Answer 2

[[self view] addSubview: [otherViewController view]];

CGRect frame = [[self view] frame];

int direction = 1;
switch (direction) {
    case 0: // from bottom
        frame.origin.y = [[self view] frame].size.height;
        [[otherViewController view] setFrame: frame];
        frame.origin.y = 0.0 - [[self view] frame].size.height;
        break;
    case 1: // from right
        frame.origin.x = [[self view] frame].size.width;
        [[otherViewController view] setFrame: frame];
        frame.origin.x = 0.0 - [[self view] frame].size.width;
        break;
}

[UIView animateWithDuration: 1.0
                      delay: 0.0
                    options: UIViewAnimationOptionCurveEaseInOut
                 animations:^{
                     [[self view] setFrame: frame];
                 }
                 completion: ^(BOOL finished) {

                 }
];

Answer 3

It's depend on your requirement of showing view controller. There could be one more pushing the controller in navigation stack.

[self.navigationController pushViewController:anotherViewController animated:YES];

Check appl forum post for when to use pushViewController: and when presentModalViewController: .

pushViewController versus presentModalViewController

presentModalViewController vs. pushViewController

Answer 4

Both of the way, are almost equivalent, as the make a stack of views, you can see the beneath view(till not been alkaline) by, [self removeFromSuperview] , when you addSubView , and [self dismissModalViewControllerAnimated:YES]; , when yo use [self presentModalViewController:tempView animated:NO]; , But Yea presentModalViewController , give you default option for animation whether with addSubview , you need to work a bit for that.

Answer 5

Depends on what you want. No one way is better than the other. All are just... ways.