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使用系统自带的AlertView时候难免需要实现代理方法，不如使用block方便，这里通过UIView自定义一个AlertView，可以无按钮，一个按钮，两个按钮三种形式

效果

下面先看一下效果图吧

使用

LYAlertView.show("title", "message")LYAlertView.show("title", "message", "btnTitle", {//点击按钮})LYAlertView.show("title", "message", "leftTitle", "rightTitle", {//右按钮}, { //左按钮})

源码

下面直接将代码展示出来，你可以选择借鉴或者直接复制下面代码，或者使用LYTools

////  LYAlertView.swift//  qixiaofu//   _//  | |      /\   /\//  | |      \ \_/ ///  | |       \_~_///  | |        / \//  | |__/\    [ ]//  |_|__,/    \_/////  Created by ly on 2017/6/29.//  Copyright © 2017年 qixiaofu. All rights reserved.//import UIKitimport QuartzCorelet KTitltOringy:CGFloat = 15.0let KTitltHeight:CGFloat = 25.0let KContentOringy:CGFloat = 30.0let KBetweenLableOffset:CGFloat = 20.0let KAlertWidth:CGFloat = 245.0let KAlertHeight:CGFloat = 160.0typealias leftBlock = () ->()typealias rightBlock = ()->()typealias DelaydismissBlock = ()->()class LYAlertView: UIView {var leftblock : leftBlock?var rightblock : rightBlock?var dismissblock : DelaydismissBlock?var alertTitleLabel : UILabel?var alertContentLabel : UILabel?var leftBtn : UIButton?var rightBtn : UIButton?var backImageView:UIView?var delayTime:Int64 = 0override init(frame: CGRect) {super.init(frame: frame)self.backgroundColor = UIColor.black.withAlphaComponent(0.3)self.addTapActionBlock { if (self.dismissblock != nil){self.dismissblock!()}self.removeFromSuperview()}}//没有按钮func initBody(title:String,message:String,DismissDelay:Int64){self.delayTime = DismissDelayself.initTwoBtn(title: title, message: message, cancelButtonTitle: "", otherButtonTitle: "")}//一个按钮func initOneBtn(title:String,message:String,ButtonTitle:String){self.initTwoBtn(title: title, message: message, cancelButtonTitle: "", otherButtonTitle: ButtonTitle)}//两个按钮func initTwoBtn(title:String,message:String,cancelButtonTitle:String,otherButtonTitle:String) {//super.init(frame: CGRectZero)backImageView = UIImageView(frame: CGRect(x:0, y:0, width:KAlertWidth, height:KAlertHeight))backImageView?.center = self.centerbackImageView?.backgroundColor = UIColor.RGBS(s: 250)backImageView?.layer.cornerRadius = 15.0backImageView?.isUserInteractionEnabled = trueself.addSubview(backImageView!)alertTitleLabel = UILabel(frame: CGRect(x:0, y:KTitltOringy, width:KAlertWidth, height:KTitltHeight))alertTitleLabel!.font = UIFont.boldSystemFont(ofSize: 20.0)alertTitleLabel!.textColor = UIColor(red:56.0/255.0,green:64.0/255.0,blue:71.0/255.0,alpha:1)backImageView?.addSubview(alertTitleLabel!)let contentLabelWidth = KAlertWidth - 16alertContentLabel = UILabel(frame:CGRect(x:(KAlertWidth - contentLabelWidth) * 0.5, y:alertTitleLabel!.frame.maxY, width:contentLabelWidth, height:60))alertContentLabel!.numberOfLines = 0alertContentLabel!.textAlignment = NSTextAlignment.centeralertTitleLabel!.textAlignment = NSTextAlignment.centeralertContentLabel!.textColor = UIColor(red:127.0/255.0,green:127.0/255.0,blue:127.0/255.0,alpha:1)alertContentLabel!.font = UIFont.systemFont(ofSize: 15.0)backImageView?.addSubview(alertContentLabel!)alertTitleLabel!.text = title as StringalertContentLabel!.text = message as Stringlet KSingleButtonWidth:CGFloat = 160.0let kCoupleButtonWidth:CGFloat = 107.0let kButtonHeight:CGFloat = 40.0let kButtonBottomOffset:CGFloat = 10.0//没有按钮if cancelButtonTitle.isEmpty && otherButtonTitle.isEmpty{alertTitleLabel?.frame.origin.y = KTitltOringy+20alertContentLabel?.frame.size.height = 100if(self.delayTime==0){self.delayTime = 2}DispatchQueue.main.asyncAfter(deadline: DispatchTime.now() + Double((Int64)(UInt64(self.delayTime) * NSEC_PER_SEC)) / Double(NSEC_PER_SEC), execute: {if (self.dismissblock != nil){self.dismissblock!()}self.removeFromSuperview()})return}else if !cancelButtonTitle.isEmpty && !otherButtonTitle.isEmpty {//两个按钮let leftBtnFrame = CGRect(x:(KAlertWidth - 2 * kCoupleButtonWidth - kButtonBottomOffset) * 0.5, y:KAlertHeight - kButtonBottomOffset/2.0 - kButtonHeight, width:kCoupleButtonWidth, height:kButtonHeight);let rightBtnFrame = CGRect(x:leftBtnFrame.maxX + kButtonBottomOffset, y:KAlertHeight - kButtonBottomOffset/2.0 - kButtonHeight, width:kCoupleButtonWidth, height:kButtonHeight);leftBtn = UIButton(frame:leftBtnFrame);rightBtn = UIButton(frame:rightBtnFrame)//        rightBtn!.setBackgroundImage( UIImage(named: "button_orange_normal") ,for:UIControlState.normal)//        rightBtn!.setBackgroundImage( UIImage(named: "button_orange_click") ,for:UIControlState.selected)rightBtn!.setTitle(otherButtonTitle as String, for: UIControlState.normal)rightBtn!.titleLabel!.font = UIFont.boldSystemFont(ofSize: 14)rightBtn!.setTitleColor(UIColor.RGBS(s: 33),for:UIControlState.normal)rightBtn!.addTarget(self, action: #selector(LYAlertView.rightBtnClicked), for: UIControlEvents.touchUpInside)rightBtn!.layer.masksToBounds = truerightBtn!.layer.cornerRadius = 3.0backImageView?.addSubview(rightBtn!)//按钮上面的线let topLine = UIView.init(frame: CGRect(x:0, y:KAlertHeight - kButtonBottomOffset - kButtonHeight, width:KAlertWidth, height:1.5))topLine.backgroundColor = UIColor.RGBS(s: 240)backImageView?.addSubview(topLine)//按钮之间的线let bottomLine = UIView.init(frame: CGRect(x:leftBtnFrame.maxX + kButtonBottomOffset/2.0, y:KAlertHeight - kButtonBottomOffset - kButtonHeight, width:1.5, height:kButtonHeight + kButtonBottomOffset))bottomLine.backgroundColor = UIColor.RGBS(s: 240)backImageView?.addSubview(bottomLine)}else{//按钮上面的线let topLine = UIView.init(frame: CGRect(x:0, y:KAlertHeight - kButtonBottomOffset - kButtonHeight, width:KAlertWidth, height:1.5))topLine.backgroundColor = UIColor.RGBS(s: 240)backImageView?.addSubview(topLine)//一个按钮leftBtn = UIButton(frame:CGRect(x:(KAlertWidth-KSingleButtonWidth)/2, y:KAlertHeight - kButtonBottomOffset/2.0 - kButtonHeight, width:KSingleButtonWidth, height:kButtonHeight))}//            leftBtn?.setBackgroundImage(UIImage(named: "button_white_normal"), for: UIControlState.normal)//            leftBtn?.setBackgroundImage(UIImage(named: "button_white_clicked"), for: UIControlState.selected)leftBtn!.setTitle(cancelButtonTitle as String, for: UIControlState.normal)leftBtn!.titleLabel!.font = UIFont.boldSystemFont(ofSize: 14)leftBtn!.setTitleColor(UIColor.RGBS(s: 33),for:UIControlState.normal)leftBtn!.addTarget(self, action: #selector(LYAlertView.leftBtnClicked), for: UIControlEvents.touchUpInside)leftBtn!.layer.masksToBounds = truebackImageView?.addSubview(leftBtn!)leftBtn!.layer.masksToBounds = trueleftBtn!.layer.cornerRadius = 3.0}func leftBtnClicked(){if (self.leftblock != nil){self.leftblock!()}self.dismiss()}func rightBtnClicked(){if (self.rightblock != nil){self.rightblock!()}self.dismiss()}//MARK: - 显示//2个按钮class func show( _ title:String, _ message:String, _ leftTitle:String, _ rightTitle:String, _ rightClick:rightBlock? = nil, _ leftClick:leftBlock? = nil, _ dismissBlock:DelaydismissBlock? = nil)->Void{let alert = LYAlertView.init(frame: CGRect(x:0, y:0, width:UIScreen.main.bounds.width, height:UIScreen.main.bounds.height))alert.initTwoBtn(title: title, message: message, cancelButtonTitle: leftTitle, otherButtonTitle: rightTitle)alert.occur(animation: true)alert.leftblock = leftClickalert.rightblock = rightClickalert.dismissblock = dismissBlock}//1个按钮class func show( _ title:String, _ message:String, _ leftTitle:String, _ leftClick:leftBlock? = nil, _ dismissBlock:DelaydismissBlock? = nil)->Void{self.show(title, message, leftTitle, "", nil, leftClick, dismissBlock)}//0个按钮class func show( _ title:String, _ message:String, _ dismissBlock:DelaydismissBlock? = nil)->Void{self.show(title, message, "", "", nil, nil, dismissBlock)}func occur(animation:Bool) -> Void{UIApplication.shared.keyWindow?.addSubview(self)UIApplication.shared.keyWindow?.bringSubview(toFront: self)if animation {UIView.animate(withDuration: 0.1, delay: 0, options:UIViewAnimationOptions.transitionCrossDissolve, animations: { () -> Void inself.alpha = 1.0self.backImageView?.layer.setAffineTransform(CGAffineTransform(scaleX: 0.9, y: 0.9))}) { (Bool) -> Void inUIView.animate(withDuration: 0.1, delay: 0, options: UIViewAnimationOptions.transitionCrossDissolve, animations: { () -> Void inself.backImageView?.layer.setAffineTransform(CGAffineTransform(scaleX: 1.1, y: 1.1))}) { (Bool) -> Void inUIView.animate(withDuration: 0.1, delay: 0, options: UIViewAnimationOptions.transitionCrossDissolve, animations: { () -> Void inself.backImageView?.layer.setAffineTransform(CGAffineTransform(scaleX: 0.9, y: 0.9))}) { (Bool) -> Void inself.backImageView?.layer.setAffineTransform(CGAffineTransform(scaleX: 1.0, y: 1.0))}}}}}func dismiss() -> Void{UIView.animate(withDuration: 0.2, delay: 0, options: UIViewAnimationOptions.transitionCrossDissolve, animations: { () -> Void inself.alpha = 0}) { (Bool) -> Void inself.removeFromSuperview()}}required init?(coder aDecoder: NSCoder) {fatalError("init(coder:) has not been implemented")}}