//This code works with Swift 5

//Get all views in the custom view's xib file
let allViewsInXibArray = Bundle.main.loadNibNamed("PromoView1", owner: self, options: nil)

//Grab the view in the xib's array of items
let promoView = allViewsInXibArray!.first as! UIView

//Initialize your UpsellViewController
let upsellVC = UpsellViewController(title: "Refer a Friend and You'll Both Get Bandmate Plus, for Life!", subtitle: "With Plus, you can...", promoView: promoView, numberOfPages: 5)

//Create some actions for your user to interact with the UpsellViewController
let cancel = UpsellAction(title: "Cancel", style: .cancel)
upsellVC.addAction(learnMore)

let doSomeAction = UpsellAction(title: "Do Something", style: .default) {
    print("Did something")
}
upsellVC.addAction(referAFriend)

//Present our UpsellViewController
present(upsellVC, animated: false, completion: nil)

//Initialize your UpsellViewController
let upsellVC = UpsellViewController(title: "Some title", subtitle: "Some subtitle", promoView: promoView, numberOfPages: 3)

//Change the title/subtitle colors
upsellVC.titleLabel.textColor = UIColor.blue
upsellVC.subtitleLabel.textColor = UIColor.green

//Toggle autoscroll...
upsellVC.isAutoScrollEnabled = false
upsellVC.isAutoScrollEnabled = true

//...or change the speed at which your UpsellViewController autoscrolls
//upsellVC.autoScrollBuffer is the amount of time, in seconds, the UpsellViewController will wait between autoscrolling the content view. Lower = faster
upsellVC.autoScrollBuffer = 5

//upsellVC.autoScrollSpeed is the amount of time, in seconds, the UpsellViewController takes to animate the autoscrolling of the content view. Lower = faster
upsellVC.autoScrollSpeed = 0.3

//Change the page control tint colors
upsellVC.pageIndicatorTintColor = .blue
upsellVC.currentPageIndicatorTintColor = .green

//Then go ahead and add your actions for your user to interact with your UpsellViewController

//Crate your button
let oneMonth = UpsellAction(title: "1 MONTH", style: .default) {
    print("Subscribing for one month")
}

//Hide the separator
oneMonth.showSeparator = false

//Set the button's corner radius, as a fraction of the button's height (0.5 will round your button's corners)
oneMonth.cornerRadius = 0.5

//Set the button's background color
oneMonth.backgroundColor = UIColor(red: 81/255, green: 189/255, blue: 209/255, alpha: 1)

//Change the button's title color
oneMonth.setTitleColor(.white, for: .normal)

//Add the action to your UpsellViewController
upsellVC.addAction(oneMonth)