YXJPageController

pod 'YXJPageController'

import UIKit
import YXJPageController

class DIYPageView: YXJAbstractDotView {

    override init(frame: CGRect) {
        super.init(frame: frame)
        self.backgroundColor = UIColor.blueColor()
    }

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)

        self.backgroundColor = UIColor.blueColor()
    }

    override func changeActivityState(active: Bool) {
        if active == true {
            self.backgroundColor = UIColor.redColor()
        } else {
            self.backgroundColor = UIColor.blueColor()
        }
    }

}