Choose between view controllers

Question

Hi,

I have a certain UIViewController (ViewController1), which shows contents of a database. And I want to show another view controller(ViewController2) if the database was not loaded before.

So when user enters ViewController1 and the database was not loaded before, I want to take him to ViewController2 instead of ViewController1.

Something like this:

@implementation ViewController1

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];

    if (isDatabaseLoaded) {show contents of ViewController1;}
    else {take user to ViewController2;}
}

How can I do it? What is the most elegant way to do this?

Thank you in advance.

Answer 1

You have a few different options.

1. You can push to ViewController2.

   [ViewController1.navigationController pushViewController:ViewController2 animated:YES];

2. You can present ViewController2

   [ViewController1 presentModalViewController:ViewController2 animated:YES];

3. You can simply swap out the view of ViewController1 to that of ViewController2

   ViewController1.view = ViewController2.view;

Answer 2

if (!isDatabaseLoaded)
    [self.navigationController pushViewController:ViewController2 animated:YES];