monodelvelop中运行后弹出指定xib窗体及显示分组数据

环境：苹果系统 

开发工具：monodevelop xcode

开发语言：c#

疑问：如何在新建的monotouch空项目中 运行后弹出指定的xib窗体

解答:

      1、首先添加新文件，选择ipad/iphone view controller，命名为mainwindows

      2、在mainwindows中写入如下代码（使用UITableView显示分组数据,格式化代码快捷键Ctrl+i）：

using System.Linq;
using System;
using System.Drawing;
using System.Globalization;
using System.Collections.Generic;
using MonoTouch.Foundation;
using MonoTouch.UIKit;

namespace tables03s {
    
    struct Element
    {
        public string Number{get;set;}
        public string Name{get;set;}
        public string Symbol{get;set;}
        public string Family{get;set;}
        public string StartsWith{get{return Name.Substring(0,1);}}
    }
    public partial class mainWindows : UIViewController {
        private List<Element> elements;
        public mainWindows() : base ("mainWindows", null) {
            
            elements = new List<Element>
            {
                new Element{Name="hydrogen",Number="1",Symbol="H",Family="Hydrogen"},
                new Element{Name="helium",Number="2",Symbol="He",Family="Noble gas"},
                new Element{Name="lithium",Number="3",Symbol="Li",Family="Alkali Metal"},
                new Element{Name="beryllium",Number="4",Symbol="Be",Family="Alkaline Earth"},
                new Element{Name="boron",Number="5",Symbol="B",Family="Boron"},
                new Element{Name="carbon",Number="6",Symbol="C",Family="Carbon"},
                new Element{Name="nitrogen",Number="7",Symbol="N",Family="Pnictide"},
                new Element{Name="oxygen",Number="8",Symbol="O",Family="Chalcogen"},
                new Element{Name="fluorine",Number="9",Symbol="F",Family="Halogen"},
                new Element{Name="neon",Number="10",Symbol="Ne",Family="Noble gas"},
                new Element{Name="sodium",Number="11",Symbol="Na",Family="Alkali Metal"},
                new Element{Name="magnesium",Number="12",Symbol="Mg",Family="Alkaline Earth"},
                new Element{Name="aluminum",Number="13",Symbol="Al",Family="Boron"},
                new Element{Name="silicon",Number="14",Symbol="Si",Family="Boron"}
                
            };
            
            
        }
        
        
        public override void DidReceiveMemoryWarning() {
            // Releases the view if it doesn't have a superview.
            base.DidReceiveMemoryWarning();
            
            // Release any cached data, images, etc that aren't in use.
        }
        
        public override void ViewDidLoad() {
            base.ViewDidLoad();
            tableViews.Source=new MyTableViewSource(elements);
            //    tableViews.Source=new MyTableViewSource(elements);
            // Perform any additional setup after loading the view, typically from a nib.
        }
        
        public override void ViewDidUnload() {
            base.ViewDidUnload();
            
            // Clear any references to subviews of the main view in order to
            // allow the Garbage Collector to collect them sooner.
            //
            // e.g. myOutlet.Dispose (); myOutlet = null;
            
            ReleaseDesignerOutlets();
        }
        
        public override bool ShouldAutorotateToInterfaceOrientation(UIInterfaceOrientation toInterfaceOrientation) {
            // Return true for supported orientations
            return (toInterfaceOrientation != UIInterfaceOrientation.PortraitUpsideDown);
        }
        
        private class MyTableViewSource:UITableViewSource
        {
            private  List<string> sectionTitles;
            private SortedDictionary<int,List<Element>> sectionElements
                =new SortedDictionary<int, List<Element>>();
            public MyTableViewSource(List<Element> list)
            {
                sectionTitles=(from c in list select c.StartsWith).Distinct().ToList();
                sectionTitles.Sort();
                foreach(var element in list)
                {
                    int sectionNum=sectionTitles.IndexOf(element.StartsWith);
                    if(sectionElements.ContainsKey(sectionNum))
                    {
                        sectionElements[sectionNum].Add(element);
                    }
                    else
                    {
                        sectionElements.Add(sectionNum,new List<Element>{element});
                    }
                    
                }
                
            }
            public override int NumberOfSections(UITableView tableView) {
                return sectionTitles.Count;
            }
            public override string TitleForHeader(UITableView tableView, int section) {
                return sectionTitles[section];
            }
            public override string[] SectionIndexTitles(UITableView tableView) {
                return sectionTitles.ToArray();
            }
            public override int RowsInSection(UITableView tableview, int section) {
                return sectionElements[section].Count;
            }
            public override UITableViewCell GetCell(UITableView tableView, NSIndexPath indexPath) {
                
                string kCellIdetifier="mycell";
                UITableViewCell cell=tableView.DequeueReusableCell(kCellIdetifier);
                if(cell==null)
                {
                    cell=new UITableViewCell(UITableViewCellStyle.Value2,kCellIdetifier);
                }
                Element display=sectionElements[indexPath.Section][indexPath.Row];
                cell.TextLabel.Text=display.Symbol;
                cell.DetailTextLabel.Text=display.Name;
                cell.DetailTextLabel.Font=UIFont.SystemFontOfSize(20);
                return cell;
            }
            public override void RowSelected(UITableView tableView, NSIndexPath indexPath) {
                Element display=sectionElements[indexPath.Section][indexPath.Row];
                ShowAlert("RowSelected","You selected "+display.Name);
                tableView.DeselectRow(indexPath,true);
            }
            public void ShowAlert(string title,string message)
            {
                using (var alert=new UIAlertView(title,message,null,"OK",null))
                {
                    alert.Show();
                }
            }
        }
    }
    
}

      3、在AppDelegate中写入如下代码，主要调用了window的RootViewController属性：

public partial class AppDelegate : UIApplicationDelegate {
    // class-level declarations
    UIWindow window;
    mainWindows mainUiwindows;
    //
    // This method is invoked when the application has loaded and is ready to run. In this 
    // method you should instantiate the window, load the UI into it and then make the window
    // visible.
    //
    // You have 17 seconds to return from this method, or iOS will terminate your application.
    //
    public override bool FinishedLaunching(UIApplication app, NSDictionary options) {
        window = new UIWindow(UIScreen.MainScreen.Bounds);
        mainUiwindows=new mainWindows();
        window.RootViewController=mainUiwindows; //important
        window.MakeKeyAndVisible();
        return true;
    }
}

      4、效果图如下：