MyAlertView.swift

// Pop Up Styles

enum MyAlertViewStyle: Int {

    case success

    case error

    case notice

    case warning

    case info

}

// Allow alerts to be closed/renamed in a chainable manner

// Example: MyAlertView().showSuccess(self, title: "Test", subTitle: "Value").Close()

//class MyAlertViewClose {

//    let alertview: MyAlertView

//    

//    // Initialisation and Title/Subtitle/Close functions

//    init(alertview: MyAlertView) { self.alertview = alertview }

//    func setTitle(_ title: String) { self.alertview.labelView.text = title; }

//    func setSubTitle(_ subTitle: String) { self.alertview.labelViewDescription.text = subTitle; }

//    func Close() { self.alertview.doneButtonAction() }

//}

class MyAlertView: UIView {

    let kDefaultShadowOpacity: CGFloat = 0.7;

    let kCircleHeight: CGFloat = 56.0;

    let kCircleTopPosition: CGFloat = -12; // Should not be defined here. Make it dynamic

    let kCircleBackgroundTopPosition: CGFloat = -15; // Should not be defined here. Make it dynamic

    let kCircleHeightBackground: CGFloat = 62.0;

    let kCircleIconHeight: CGFloat = 20.0;

    let kWindowWidth: CGFloat = 240.0;

    let kWindowHeight: CGFloat = 228.0;

    // Font

    let kDefaultFont: NSString = "HelveticaNeue"

    // Members declaration

    var labelView: UILabel

    var labelViewDescription: UILabel

    var shadowView: UIView

    var contentView: UIView

    var circleView: UIView

    var circleViewBackground: UIView

    var circleIconImageView: UIImageView

    var doneButton: UIButton

    var rootViewController: UIViewController

    var durationTimer: Timer!

    init () {

        // Content View

        self.contentView = UIView(frame: CGRect(x: 0, y: kCircleHeight / 4, width: kWindowWidth, height: kWindowHeight))

        self.contentView.backgroundColor = UIColor(white: 1, alpha: 1);

        self.contentView.layer.cornerRadius = 5;

        self.contentView.layer.masksToBounds = true;

        self.contentView.layer.borderWidth = 0.5;

        // Circle View

        self.circleView = UIView(frame: CGRect(x: kWindowWidth / 2 - kCircleHeight / 2, y: kCircleTopPosition, width: kCircleHeight, height: kCircleHeight))

        self.circleView.layer.cornerRadius =  self.circleView.frame.size.height / 2;

        // Circle View Background

        self.circleViewBackground = UIView(frame: CGRect(x: kWindowWidth / 2 - kCircleHeightBackground / 2, y: kCircleBackgroundTopPosition, width: kCircleHeightBackground, height: kCircleHeightBackground))

        self.circleViewBackground.layer.cornerRadius =  self.circleViewBackground.frame.size.height / 2;

        self.circleViewBackground.backgroundColor = UIColor.white

        // Circle View Image

        self.circleIconImageView = UIImageView(frame: CGRect(x: kCircleHeight / 2 - kCircleIconHeight / 2, y: kCircleHeight / 2 - kCircleIconHeight / 2, width: kCircleIconHeight, height: kCircleIconHeight))

        self.circleView.addSubview(self.circleIconImageView)

        // Title

        self.labelView = UILabel(frame: CGRect(x: 12, y: kCircleHeight / 2 + 22, width: kWindowWidth - 24, height: 40))

        self.labelView.numberOfLines = 1

        self.labelView.textAlignment = NSTextAlignment.center

        self.labelView.font = UIFont(name: kDefaultFont as String, size: 20)

        self.contentView.addSubview(self.labelView)

        // Subtitle

        self.labelViewDescription = UILabel(frame: CGRect(x: 12, y: 84, width: kWindowWidth - 24, height: 80))

        self.labelViewDescription.numberOfLines = 3

        self.labelViewDescription.textAlignment = NSTextAlignment.center

        self.labelViewDescription.font = UIFont(name: kDefaultFont as String, size: 14)

        self.contentView.addSubview(self.labelViewDescription)

        // Shadow View

        self.shadowView = UIView(frame: UIScreen.main.bounds)

        self.shadowView.backgroundColor = UIColor.black

        // Done Button

        self.doneButton = UIButton(frame: CGRect(x: 12, y: kWindowHeight - 52, width: kWindowWidth - 24, height: 40))

        self.doneButton.layer.cornerRadius = 3

        self.doneButton.layer.masksToBounds = true

        self.doneButton.setTitle("Done", for: UIControlState())

        self.doneButton.titleLabel?.font = UIFont(name: kDefaultFont as String, size: 14)

        self.contentView.addSubview(self.doneButton)

        // Root view controller

        self.rootViewController = UIViewController()

        // Superclass initiation

        super.init(frame: CGRect(x: ((320 - kWindowWidth) / 2), y: 0 - kWindowHeight, width: kWindowWidth, height: kWindowHeight))

        // Show notice on screen

        self.addSubview(self.contentView)

        self.addSubview(self.circleViewBackground)

        self.addSubview(self.circleView)

        // Colours

        self.contentView.backgroundColor = UIColorFromRGB(0xFFFFFF)

        self.labelView.textColor = UIColorFromRGB(0x4D4D4D)

        self.labelViewDescription.textColor = UIColorFromRGB(0x4D4D4D)

        self.contentView.layer.borderColor = UIColorFromRGB(0xCCCCCC).cgColor

        // On complete.

        self.doneButton.addTarget(self, action: #selector(MyAlertView.doneButtonAction), for: UIControlEvents.touchUpInside)

    }

    required init?(coder aDecoder: NSCoder) {

        fatalError("init(coder:) has not been implemented")

    }

    // showTitle(view, title, subTitle, style)

    func showTitle(_ view: UIViewController, title: String, subTitle: String, style: MyAlertViewStyle)  {

        return showTitle(view, title: title, subTitle: subTitle, completeText: nil, style: style)

    }

    // showSuccess(view, title, subTitle)

    func showSuccess(_ view: UIViewController, title: String, subTitle: String)  {

        return showTitle(view, title: title, subTitle: subTitle, completeText: nil, style: MyAlertViewStyle.success);

    }

    // showError(view, title, subTitle)

    func showError(_ view: UIViewController, title: String, subTitle: String)  {

        return showTitle(view, title: title, subTitle: subTitle, completeText: nil, style: MyAlertViewStyle.error);

    }

    // showNotice(view, title, subTitle)

    func showNotice(_ view: UIViewController, title: String, subTitle: String)  {

        return showTitle(view, title: title, subTitle: subTitle,  completeText: nil, style: MyAlertViewStyle.notice);

    }

    // showWarning(view, title, subTitle)

    func showWarning(_ view: UIViewController, title: String, subTitle: String)  {

        return showTitle(view, title: title, subTitle: subTitle, completeText: nil, style: MyAlertViewStyle.warning);

    }

    // showInfo(view, title, subTitle)

    func showInfo(_ view: UIViewController, title: String, subTitle: String)  {

        return showTitle(view, title: title, subTitle: subTitle, completeText: nil, style: MyAlertViewStyle.info);

    }

    // showTitle(view, title, subTitle, duration, style)

    func showTitle(_ view:UIViewController, title: String, subTitle: String, completeText: String?, style: MyAlertViewStyle)  {

        self.alpha = 0;

        self.rootViewController = view

        self.rootViewController.view.addSubview(self.shadowView)

        self.rootViewController.view.addSubview(self)

        // Complete text

        if(completeText != nil) {

            self.doneButton.setTitle(completeText, for: UIControlState())

        }

        // Alert colour/icon

        var viewColor: UIColor = UIColor()

        var iconImageName: NSString = ""

        // Icon style

        switch(style) {

        case MyAlertViewStyle.success:

            viewColor = UIColorFromRGB(0x22B573);

            iconImageName = "notification-success"

        case MyAlertViewStyle.error:

            viewColor = UIColorFromRGB(0xC1272D);

            iconImageName = "notification-error"

        case MyAlertViewStyle.notice:

            viewColor = UIColorFromRGB(0x727375)

            iconImageName = "notification-notice"

        case MyAlertViewStyle.warning:

            viewColor = UIColorFromRGB(0xFFD110);

            iconImageName = "notification-warning"

        case MyAlertViewStyle.info:

            viewColor = UIColorFromRGB(0x2866BF);

            iconImageName = "notification-info"

        }

        // Title

        if ((title as NSString).length > 0 ) {

            self.labelView.text = title;

        }

        // Subtitle

        if ((subTitle as NSString).length > 0) {

            self.labelViewDescription.text = subTitle;

        }

        // Alert view colour and images

        self.doneButton.backgroundColor = viewColor;

        self.circleView.backgroundColor = viewColor;

        self.circleIconImageView.image = UIImage(named: iconImageName as String)

        // Animate in the alert view

        UIView.animate(withDuration: 0.2, animations: {

            self.shadowView.alpha = self.kDefaultShadowOpacity

            var frame:CGRect = self.frame;

            frame.origin.y = self.rootViewController.view.center.y - 100;

            self.frame = frame;

            self.alpha = 1;

        }, completion: { finished in

            UIView.animate(withDuration: 0.2, animations: {

                self.center = self.rootViewController.view.center;

            }, completion: { finished in })

        })

    }

    // When click 'Done' button, hide view.

    func doneButtonAction() { hideView(); }

    //Close MyAlertView By duration

    func hideMyAlertView(duration: TimeInterval?)  {

        // Adding duration

        if (duration != nil) {

            durationTimer?.invalidate()

            durationTimer = Timer.scheduledTimer(timeInterval: duration!, target: self, selector: #selector(MyAlertView.hideView), userInfo: nil, repeats: false)

        }

    }

    // Close MyAlertView

    func hideView() {

        UIView.animate(withDuration: 0.2, animations: {

            self.shadowView.alpha = 0;

            self.alpha = 0;

        }, completion: { finished in

            self.shadowView.removeFromSuperview()

            self.removeFromSuperview()

        })

    }

    // Helper function to convert from RGB to UIColor

    func UIColorFromRGB(_ rgbValue: UInt) -> UIColor {

        return UIColor(

            red: CGFloat((rgbValue & 0xFF0000) >> 16) / 255.0,

            green: CGFloat((rgbValue & 0x00FF00) >> 8) / 255.0,

            blue: CGFloat(rgbValue & 0x0000FF) / 255.0,

            alpha: CGFloat(1.0)

        )

    }

}

ViewController.swift

import UIKit

let kSuccessTitle: NSString = "Congratulations"

let kErrorTitle: NSString = "Connection error"

let kNoticeTitle: NSString = "Notice"

let kWarningTitle: NSString = "Warning"

let kInfoTitle: NSString = "Info"

let kSubtitle: NSString = "You've just displayed this awesome Pop Up View"

let kDefaultAnimationDuration = 2.0

class ViewController: UIViewController {

    let alertView = MyAlertView()

    override func viewDidLoad() {

        super.viewDidLoad()

    }

    @IBAction func success(_ sender: Any) {

        alertView.showSuccess(self, title: kSuccessTitle as String, subTitle: kSubtitle as String)

        alertView.hideMyAlertView(duration: 1.0)

    }

    @IBAction func error(_ sender: Any) {

        alertView.showError(self, title: kErrorTitle as String, subTitle: kSubtitle as String)

        alertView.hideMyAlertView(duration: 2.0)

    }

    @IBAction func notice(_ sender: Any) {

        alertView.showNotice(self, title: kNoticeTitle as String, subTitle: kSubtitle as String)

        alertView.hideMyAlertView(duration: 3.0)

    }

    @IBAction func warning(_ sender: Any) {

        alertView.showWarning(self, title: kWarningTitle as String, subTitle: kSubtitle as String)

        alertView.hideMyAlertView(duration: 4.0)

    }

    @IBAction func info(_ sender: Any) {

        alertView.showInfo(self, title: kInfoTitle as String, subTitle: kSubtitle as String)

        alertView.hideMyAlertView(duration: 5.0)

    }

}

效果图如下：