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   源码介绍

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通过拖入工程，OC采用混编，swift可直接引用，方便调用

import Foundation

import UIKit

public func kRGB(r:CGFloat, g:CGFloat, b:CGFloat) ->UIColor{return UIColor (red: r/255.0, green: g/255.0, blue: b/255.0, alpha: 1.0)}

let AppleAppID = "1291661719"

///屏幕宽

let kSCREEN_WIDTH = UIScreen.main.bounds.width

///屏幕高

let kSCREEN_HEIGHT = UIScreen.main.bounds.height

let Ratio_375 = kSCREEN_WIDTH / 375.0

/// 转换成当前比例的数

func Ratio(x:CGFloat) -> CGFloat {

    return CGFloat(x * Ratio_375)

}

let DEFAULT_MAX_HEIGHT = kSCREEN_HEIGHT / 3 * 2

class AppUpdateAlert:UIView {

    /** 版本号 */

    var version = ""

    /** 版本更新内容 */

    var desc = ""

    /** 短连接 */

    var shortUrl = ""

    

    @objc class func showUpdateAlert(version: String?, description: String?, shortUrl:String?) {

        let updateAlert = AppUpdateAlert.init(version: version!, description: description!, shortUrl:shortUrl!)

        UIApplication.shared.delegate?.window??.addSubview(updateAlert)

    }

    override init(frame: CGRect) {

        super.init(frame: frame)

    }

    required init?(coder aDecoder: NSCoder) {

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

    }

    init(version:String,description:String, shortUrl:String) {

        super.init(frame: UIScreen.main.bounds)

        self.version = version

        desc = description

        self.shortUrl = shortUrl

        initView()

    }

    

}

// MARK: - init

extension AppUpdateAlert{

    func initView() {

        

        self.frame = UIScreen.main.bounds

        self.backgroundColor = UIColor(red: CGFloat(0 / 255.0), green: CGFloat(0 / 255.0), blue: CGFloat(0 / 255.0), alpha: 0.3 / 1.0)

        //获取更新内容高度

        var descHeight = _sizeofString(desc, font: UIFont.systemFont(ofSize: 16), maxSize: CGSize(width: self.frame.size.width-Ratio(x: 136), height: 1000)).height

        //bgView实际高度

        let realHeight: CGFloat = descHeight Ratio(x: 314)

        //bgView最大高度

        var maxHeight: CGFloat = DEFAULT_MAX_HEIGHT

        //更新内容可否滑动显示

        var scrollEnabled = false

        //重置bgView最大高度 设置更新内容可否滑动显示

        if realHeight > DEFAULT_MAX_HEIGHT {

            scrollEnabled = true

            descHeight = DEFAULT_MAX_HEIGHT - Ratio(x: 314)

        } else {

            maxHeight = realHeight

        }

        let bgView = UIView()

        bgView.center = center

        bgView.bounds = CGRect(x: 0, y: 0, width: frame.size.width - Ratio(x: 40), height: maxHeight Ratio(x: 18))

        addSubview(bgView)

        //添加更新提示

        let updateView = UIView(frame: CGRect(x: Ratio(x: 20), y: Ratio(x: 18), width: bgView.frame.size.width - Ratio(x: 40), height: maxHeight))

        updateView.backgroundColor = UIColor.init(white: 1, alpha: 0);

        bgView.addSubview(updateView)

        

        let updatebg_image = UIImageView(frame: CGRect(x: 0, y: 0, width: updateView.frame.size.width, height: updateView.frame.size.height))

        updatebg_image.image = UIImage(named: "update_bg")

        updateView.addSubview(updatebg_image)

        

        

        let updateIcon = UIImageView(frame: CGRect(x: (updateView.frame.size.width/8)*3, y: -Ratio(x: (updateView.frame.size.width)/4), width: Ratio(x: (updateView.frame.size.width)/4), height: Ratio(x: (updateView.frame.size.width)/2)))

        

        updateIcon.image = UIImage(named: "update_huojian")

        updateView.addSubview(updateIcon)

        

        

        

        //版本号

        let versionLabel = UILabel(frame: CGRect(x: Ratio(x:25), y: Ratio(x:160), width: updateView.frame.size.width, height: Ratio(x:28)))

        versionLabel.font = UIFont.boldSystemFont(ofSize: 16)

        versionLabel.textAlignment = .left

        versionLabel.text = "发现新版本 V\(version)"

        updateView.addSubview(versionLabel)

        

        

        let descTextView = UITextView(frame: CGRect(x: Ratio(x: 28), y: Ratio(x: 10) versionLabel.frame.maxY, width: updateView.frame.size.width - Ratio(x:56), height: descHeight))

        descTextView.font = UIFont.systemFont(ofSize: CGFloat(16))

        descTextView.textContainer.lineFragmentPadding = 0

        descTextView.textContainerInset = UIEdgeInsetsMake(0, 0, 0, 0)

        descTextView.text = desc

        descTextView.isEditable = false

        descTextView.isSelectable = false

        descTextView.isScrollEnabled = scrollEnabled

        descTextView.showsVerticalScrollIndicator = scrollEnabled

        descTextView.showsHorizontalScrollIndicator = false

        updateView.addSubview(descTextView)

        if scrollEnabled {

            //若显示滑动条，提示可以有滑动条

            descTextView.flashScrollIndicators()

        }

        

        //更新按钮

        let updateButton = UIButton(type: .system)

        updateButton.backgroundColor = kRGB(r: 239, g: 33, b: 67)

        updateButton.frame = CGRect(x: Ratio(x:25), y: descTextView.frame.maxY Ratio(x:20), width: updateView.frame.size.width - Ratio(x:50), height: Ratio(x:40))

        updateButton.clipsToBounds = true

        updateButton.layer.cornerRadius = 2.0

        updateButton.addTarget(self, action: #selector(self.updateVersion), for: .touchUpInside)

        updateButton.setTitle("立即更新", for: .normal)

        updateButton.setTitleColor(UIColor.white, for: .normal)

        updateView.addSubview(updateButton)

        

        

        //取消按钮

        

        let cancelButton = UIButton(type: .system)

        cancelButton.alpha = 0.0;

        cancelButton.backgroundColor = UIColor.white

        cancelButton.frame = CGRect(x: Ratio(x: 25), y: updateButton.frame.maxY Ratio(x:5), width: updateView.frame.size.width - Ratio(x:50), height: Ratio(x:30))

        cancelButton.setTitle("取消", for: .normal)

        cancelButton.setTitleColor(UIColor.darkGray, for: .normal)

        cancelButton.addTarget(self, action: #selector(self.cancelAction), for: .touchUpInside)

        updateView.addSubview(cancelButton)

        //显示更新

        show(withAlert: bgView)

        

        

        

    }

}

// MARK: - action

extension AppUpdateAlert{

    

    

    /// 更新按钮点击事件 跳转AppStore更新

    @objc func updateVersion() {

        

        let str = self.shortUrl

        if let aStr = URL(string: str) {

            UIApplication.shared.openURL(aStr)

        }

    }

    /// 取消按钮点击事件

    @objc func cancelAction() {

        dismissAlert()

    }

    /// 添加Alert入场动画

    ///

    /// - Parameter alert: 添加动画的View

    @objc func show(withAlert alert: UIView?) {

        let animation = CAKeyframeAnimation(keyPath: "transform")

        animation.duration = CFTimeInterval(0.3)

        var values = [AnyHashable]()

        values.append(NSValue(caTransform3D: CATransform3DMakeScale(0.1, 0.1, 1.0)))

        values.append(NSValue(caTransform3D: CATransform3DMakeScale(1.2, 1.2, 1.0)))

        values.append(NSValue(caTransform3D: CATransform3DMakeScale(0.9, 0.9, 1.0)))

        values.append(NSValue(caTransform3D: CATransform3DMakeScale(1.0, 1.0, 1.0)))

        animation.values = values

        alert?.layer.add(animation, forKey: nil)

    }

    /// 添加Alert出场动画

    @objc func dismissAlert() {

        UIView.animate(withDuration: 0.3, animations: {() -> Void in

            self.transform = CGAffineTransform(scaleX: 1.5, y: 1.5)

            self.backgroundColor = UIColor.clear

            self.alpha = 0

        }, completion: {(_ finished: Bool) -> Void in

            self.removeFromSuperview()

        })

    }

    @objc func _sizeofString(_ string: String?, font: UIFont?, maxSize: CGSize) -> CGSize {

        let attributes = [NSAttributedStringKey.font: font]

        let rect:CGRect = string?.boundingRect(with: maxSize, options: [.usesLineFragmentOrigin, .usesFontLeading], attributes: attributes as Any as? [NSAttributedStringKey : Any], context: nil) ?? CGRect.zero

        return rect.size

    }

    

}