由于系统自带的AlertView和UIAlertController满足不了项目所需的要求，主要是这两个控件都实现不了，手动添加的三个Button按钮能横排显示在屏幕的中央，所以只能自己定义了！
1.首先新建一个UIView类，起名叫MyPopView
using System;
using System.Drawing;
using CoreGraphics;
using Foundation;
using UIKit;
namespace PoupUIView
{
[Register(“MyPopView”)]
public class MyPopView : UIView
{
public UIView view;
float m_width;
float m_height;
public MyPopView(RectangleF bounds) : base(bounds)
{
this.Frame = bounds;//铺满整个屏幕
}
public override void LayoutSubviews(){base.LayoutSubviews();//这种写法 不仅大View是透明的，小view也跟着透明了//this.BackgroundColor = UIColor.Black;//this.Alpha = 0.5f;**this.BackgroundColor = UIColor.FromRGBA(0, 0, 0, 0.5f);** //让当前的View透明（遮罩层）//动态获取当前屏幕的宽和高（以实现横竖屏幕时弹窗始终显示在屏幕的中央）m_width = (float)UIScreen.MainScreen.Bounds.Width;m_height = (float)UIScreen.MainScreen.Bounds.Height;if (view == null){view = new UIView(new CGRect((m_width - 337) / 2, (m_height - 206) / 2, 337, 206));view.SizeToFit();view.Layer.CornerRadius = 5;view.BackgroundColor = UIColor.White;view.Alpha = 1.0f;this.AddSubview(view);AddChildView();} }private void AddChildView(){UILabel titleLabel = new UILabel(new CoreGraphics.CGRect(120, 18, 86, 31));titleLabel.Text = "编辑批注";titleLabel.TextColor = UIColor.Black;titleLabel.SizeToFit();view.AddSubview(titleLabel);UILabel userInfo = new UILabel(new CoreGraphics.CGRect(45, 57, 242, 21));userInfo.Text = "用户：李四时间：2018/3/7/15.00.18";userInfo.Font = UIFont.SystemFontOfSize(13);userInfo.TextColor = UIColor.Black;userInfo.SizeToFit();view.AddSubview(userInfo);UIProgressView progressView = new UIProgressView(new CoreGraphics.CGRect(45, 98, 247, 9));progressView.Progress = 100;view.AddSubview(progressView);UIButton button1 = new UIButton(new CoreGraphics.CGRect(45, 115, 67, 30));button1.SetTitle("播放", UIControlState.Normal);button1.TouchUpInside += Button1_TouchUpInside;button1.BackgroundColor = UIColor.Gray;UIButton button2 = new UIButton(new CoreGraphics.CGRect(132, 115, 67, 30));button2.SetTitle("停止", UIControlState.Normal);button2.TouchUpInside += Button2_TouchUpInside;button2.BackgroundColor = UIColor.Gray;UIButton button3 = new UIButton(new CoreGraphics.CGRect(221, 115, 67, 30));button3.SetTitle("重录", UIControlState.Normal);button3.TouchUpInside += Button3_TouchUpInside;button3.BackgroundColor = UIColor.Gray;view.AddSubview(button1);view.AddSubview(button2);view.AddSubview(button3);UIButton button4 = new UIButton(new CoreGraphics.CGRect(20, 159, 62, 30));button4.SetTitle("移动", UIControlState.Normal);button4.SetTitleColor(UIColor.Black, UIControlState.Normal);view.AddSubview(button4);button4.TouchUpInside += Button4_TouchUpInside;UIButton button5 = new UIButton(new CoreGraphics.CGRect(255, 159, 62, 30));button5.SetTitle("删除", UIControlState.Normal);button5.SetTitleColor(UIColor.Black, UIControlState.Normal);view.AddSubview(button5);button5.TouchUpInside += Button5_TouchUpInside;}public override void TouchesBegan(NSSet touches, UIEvent evt){//base.TouchesBegan(touches, evt);UITouch touch = touches.AnyObject as UITouch;if (touch.View == view){return;}this.RemoveFromSuperview();}private void Button5_TouchUpInside(object sender, EventArgs e){Console.WriteLine("您点击了删除！！！");// this.Hidden = true; 让当前的大View隐藏this.RemoveFromSuperview(); //移除当前的View}private void Button4_TouchUpInside(object sender, EventArgs e){Console.WriteLine("您点击了移动！！！");}private void Button3_TouchUpInside(object sender, EventArgs e){Console.WriteLine("您点击了重录！！！");}private void Button2_TouchUpInside(object sender, EventArgs e){Console.WriteLine("您点击了停止！！！");}private void Button1_TouchUpInside(object sender, EventArgs e){Console.WriteLine("您点击了播放！！！");}
}
}
2.在ViewController中引用自己定义的UIView
using System;
using System.Drawing;
using UIKit;
namespace PoupUIView
{
public partial class MainViewController : UIViewController
{
private MyPopView m_mypopView;
public MainViewController() : base("MainViewController", null){}**public MyPopView MypopView{get{if (m_mypopView == null){m_mypopView = new MyPopView(new RectangleF(0, 0, (float)UIScreen.MainScreen.Bounds.Width, (float)UIScreen.MainScreen.Bounds.Height));}return m_mypopView;}}**public override void DidReceiveMemoryWarning(){base.DidReceiveMemoryWarning();}public override void ViewDidLoad(){base.ViewDidLoad();//设置背景色this.View.BackgroundColor = UIColor.Yellow;popButton.TouchUpInside += PopButton_TouchUpInside;}private void PopButton_TouchUpInside(object sender, EventArgs e){if (MypopView.Hidden){MypopView.Hidden = false;}else{//this.View.Window.AddSubview(MypopView);//在Button的点击事件中添加自定义viewthis.View.AddSubview(MypopView);}}
}
}
3.程序运行效果截图如下：
4.设置当点击屏幕的空白区域时让弹窗消失
需要重写
public override void TouchesBegan(NSSet touches, UIEvent evt)
{
//base.TouchesBegan(touches, evt);
UITouch touch = touches.AnyObject as UITouch;//这里设置当触摸小view时，不让弹窗消失！if (touch.View == view){return;}// this.Hidden = true; 让当前的大View隐藏this.RemoveFromSuperview();//否则就将让大View移除
}