import KSGuideController

var items = [KSGuideItem]()
for button in buttons {
    let n = Int(arc4random()) % string.count
    let index = string.index(string.startIndex, offsetBy: Int(n))
    let text = string[..<index]
    if n % 2 == 0 {
        // Use custom arrow image for every item, you can also set global arrow image for all items by setting the arrowImage property for a KSGuideController instance.
        let item = KSGuideItem(sourceView: button, arrowImage: #imageLiteral(resourceName: "arrow"), text: String(text))
        items.append(item)
    } else {
        // Use default arrow image
        let item = KSGuideItem(sourceView: button, text: String(text))
        items.append(item)
    }
}
let vc = KSGuideController(items: items, key: "MainGuide")
vc.setIndexWillChangeBlock { (index, item) in
    print("Index will change to \(index)")
}
vc.setIndexDidChangeBlock { (index, item) in
    print("Index did change to \(index)")
}
vc.show(from: self) { 
    print("Guide controller has been dismissed")
}