#import <NAKPlaybackIndicatorView/NAKPlaybackIndicatorView.h>

- (void)viewDidLoad
{
    [super viewDidLoad];

    NAKPlaybackIndicatorViewStyle *style = [NAKPlaybackIndicatorViewStyle iOS7Style];
    NAKPlaybackIndicatorView *indicator = [[NAKPlaybackIndicatorView alloc] initWithStyle:style];
    [self.view addSubview:indicator];
    [indicator sizeToFit];

    // Initially the `state` property is NAKPlaybackIndicatorViewStateStopped
    // and the `hidesWhenStopped` property is YES.
    // Thus, the view is hidden at this time.

    // The view appears and the bars start animation.
    indicator.state = NAKPlaybackIndicatorViewStatePlaying;

    // The bars stop animation and become idle.
    indicator.state = NAKPlaybackIndicatorViewStatePaused;

    // The view becomes hidden.
    indicator.state = NAKPlaybackIndicatorViewStateStopped;
}

NAKPlaybackIndicatorView *indicator = [[NAKPlaybackIndicatorView alloc] initWithFrame:CGRectZero];
indicator.translatesAutoresizingMaskIntoConstraints = NO;
[self.view addSubview:indicator];

// Then, add some positioning layout constraints.
// Note that normally you don't need to add sizing constraints
// since NAKPlaybackIndicatorView has an intrinsic content size.
// It will be automatically resized to fit its content.

NAKPlaybackIndicatorView *indicator = [[NAKPlaybackIndicatorView alloc] initWithFrame:CGRectZero];
[self.view addSubview:indicator];
[indicator sizeToFit]; // Resize itself to fit its content.