如何将对话视图控制器作为子视图添加到UIView或者反之亦然？

Question

我已经在网上浏览了一段时间,寻找关于这个主题的任何资源,并且没有提出解决我的困境的任何事情.

我有一个对话框视图控制器,它的根目的只是显示一个字符串列表,类似于iphone音乐歌曲可滚动视图的布局方式.我需要的是位于屏幕顶部的子视图和位于其下方的可滚动DVC.我需要顶视图始终在视图中,而用户可以滚动浏览根元素,因为顶视图将保持统计信息.

我尝试添加一个子视图,但它只是重叠了它下面的dvc,我还没有找到一种方法将dvc作为子视图添加到UIView.

任何帮助将非常感激.

Answer 1

实现这一目标需要的是一个托管两个子视图控制器的单根视图控制器.一个子视图包含窗口顶部的统计信息.底部子视图包含一个保存对话框视图的导航控制器.

using System;
using System.Collections.Generic;
using System.Linq;

using MonoTouch.Foundation;
using MonoTouch.UIKit;
using MonoTouch.Dialog;
using System.Drawing;

namespace delete201205203
{
    [Register ("AppDelegate")]
    public partial class AppDelegate : UIApplicationDelegate
    {
        UIWindow window;
        MyUIViewController _mvc;

        public override bool FinishedLaunching (UIApplication app, NSDictionary options)
        {
            window = new UIWindow (UIScreen.MainScreen.Bounds);

            _mvc = new MyUIViewController ();

            window.RootViewController = _mvc;
            window.MakeKeyAndVisible ();

            return true;
        }
    }

    public class MyUIViewController : UIViewController
    {
        MyDialogViewController _dvc;
        UINavigationController _nav;
        StatisticsViewController _statistics;

        public override void ViewDidLoad ()
        {
            base.ViewDidLoad ();

            var root = new RootElement ("Root") {
                new Section ("Section") {
                    new EntryElement ("caption", "placeholder", ""),
                    new RootElement ("Root 2") {
                        new Section ("Section") {
                            new EntryElement ("caption", "placeholder", ""),
                            new StringElement ("Back", () => {
                                _nav.PopViewControllerAnimated (true);  
                            })
                        }
                    }
                }
            };

            _dvc = new MyDialogViewController (root);
            _nav = new UINavigationController (_dvc);
            _nav.SetNavigationBarHidden (true, false);
            _nav.View.Frame = new RectangleF (0, 70f,
                                              this.View.Bounds.Width, 
                                              this.View.Bounds.Height -70f);

            _statistics = new StatisticsViewController ();
            _statistics.View.Frame = new RectangleF (0, 0,
                                              this.View.Bounds.Width, 
                                              70f);

            this.AddChildViewController (_nav);
            this.View.AddSubview (_nav.View);

            this.AddChildViewController (_statistics);
            this.View.AddSubview (_statistics.View);
        }

        public override void ViewWillLayoutSubviews ()
        {
            base.ViewWillLayoutSubviews ();
            _nav.View.Frame = new RectangleF (0, 70f,
                                              this.View.Bounds.Width, 
                                              this.View.Bounds.Height -70f);

            _statistics.View.Frame = new RectangleF (0, 0,
                                              this.View.Bounds.Width, 
                                              70f);
        }

        public override bool ShouldAutorotateToInterfaceOrientation (UIInterfaceOrientation toInterfaceOrientation)
        {
            return true;
        }
    }

    public class StatisticsViewController : UIViewController
    {
        UILabel _label;
        public override void ViewDidLoad ()
        {
            base.ViewDidLoad ();
            this.View.BackgroundColor = UIColor.White;

            _label = new UILabel (new RectangleF (this.View.Bounds.Width * .5f - 50f,
                                                  this.View.Bounds.Height * .5f -10f,
                                                  100f, 20f));
            _label.AutoresizingMask = UIViewAutoresizing.FlexibleMargins;

            _label.Text = "statistics";
            this.View.AddSubview (_label);

        }

        public override bool ShouldAutorotateToInterfaceOrientation (UIInterfaceOrientation toInterfaceOrientation)
        {
            return true;
        }
    }

    // This overrde is needed to ensure the pop view animation  
    // works correctly in landscape mode
    public class MyDialogViewController : DialogViewController
    {
        public MyDialogViewController (RootElement root) : base (root) {}
        public override bool ShouldAutorotateToInterfaceOrientation (UIInterfaceOrientation toInterfaceOrientation)
        {
            return true;
        }   
    }
}