Question

I made a class called view2 which is a UIView Controller subclass and when i run the program the timer works fine but when it changes screens it just goes to black and not the picture I have on view2. This is the code I have on the .m of the opening view can anyone see where this is going wrong?

- (void)viewDidLoad
{
    randomMain = [NSTimer scheduledTimerWithTimeInterval:(2) target:self selector:@selector(onTimer) userInfo:nil repeats:NO];

    [super viewDidLoad];
}


-(void)onTimer{

    view2 *second= [[view2 alloc] initWithNibName:nil bundle:nil];
    [self presentViewController:second animated:YES completion:nil];

}

Answer 1

You have to specify the name of the xib file you want to load (without extension):

view2 *second = [[view2 alloc] initWithNibName:@"MyView2Xib" bundle:nil];

Or if you create the GUI programmatically, just use a simple init:

view2 *second = [[view2 alloc] init];

Some additional remarks:

• Class names should always start with a capital letter, to distinguish them from variables.
• It’s a good idea to include part of the superclass’ name in your subclass’ name. If I saw a class called View2, I would assume it’s a UIView subclass. I’d rather call it ViewController2.
• There is no need to put the interval in parenthesis.
• The action of an NSTimer should have a single argument (itself).

EDIT:

With a storyboard you have to manually perform the seque you set up between the 2 views:

- (void)onTimer {
    [self performSegueWithIdentifier:@"YourSegueIdentifier" sender:self];
}