Some users have requested a sample implementation to make a child viewcontroller showing a timeline of Tweets.

SimpleChildTimelineViewController.m

#import <TwitterKit/TwitterKit.h>

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    self.view.backgroundColor = [UIColor lightGrayColor];

    // Standard TWTRTimelineViewController setup
    TWTRUserTimelineDataSource *dataSource = [[TWTRUserTimelineDataSource alloc] initWithScreenName:@"StephenCurry30" APIClient:[[TWTRAPIClient alloc] init]];
    TWTRTimelineViewController *timelineViewController = [[TWTRTimelineViewController alloc] initWithDataSource:dataSource];

    // Standard parent-child view controller
    [self addChildViewController:timelineViewController];
    [self.view addSubview:timelineViewController.view];
    [timelineViewController didMoveToParentViewController:self];

    // Standard sizing
    timelineViewController.view.translatesAutoresizingMaskIntoConstraints = NO;
    [self.view addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|-150-[timeline]-150-|" options:0 metrics:nil views:@{@"timeline": timelineViewController.view}]];
    [self.view addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|[timeline]|" options:0 metrics:nil views:@{@"timeline": timelineViewController.view}]];
}

@end