UIScrollView showing up as blank screen

Question

I'm trying to make a Scroll View that can page through different colored backgrounds. As of right now, when I attempt to go to that Scroll View, the backgrounds don't show up, leaving me with nothing but a blank screen and no scrolling capabilities. I've spent hours looking online for a solution to this, but nothing seems to work. This is the implementation for my ImageViewController class:

- (void)loadView
{
   [super loadView];
    NSArray *colors = [NSArray arrayWithObjects:[UIColor redColor], [UIColor greenColor], [UIColor blueColor], nil];
    for (int i = 0; i < colors.count; i++) {
        CGRect frame;
        frame.origin.x = self.scrollView.frame.size.width * i;
        frame.origin.y = 0;
        frame.size = self.scrollView.frame.size;

        UIView *subview = [[UIView alloc] initWithFrame:frame];
        subview.backgroundColor = [colors objectAtIndex:i];
        [self.scrollView addSubview:subview];
    }

    self.scrollView.contentSize = CGSizeMake(self.scrollView.frame.size.width * colors.count, self.scrollView.frame.size.height);
    [self.view addSubview:scrollView]; 
}