monotouch在ipad中的实例应用显示图像和文字

    本节主要讲述在苹果环境中使用monodevelop开发ipad的一个实例，具体操作如下

    1、新建项目 选择monotouch--ipad--Empty project 命名为iPad01

    2、添加新文件，选择monotouch--ipad view，命名为showView，这样会在项目中多出来三个文件。

    3、在AppDelegate.cs中添加如下代码，以在运行后，初始化运行界面为ShowView；

    

     UIWindow window;
     showViews shows;

     public override bool FinishedLaunching(UIApplication app, NSDictionary options) {
                // create a new window instance based on the screen size
                window = new UIWindow(UIScreen.MainScreen.Bounds);
                shows = new showViews();
                window.RootViewController = shows;
                // If you have defined a view, add it here:
                // window.AddSubview (navigationController.View);

                // make the window visible
                window.MakeKeyAndVisible();

                return true;
     }

       4、添加新类MyViewController.cs，此类继承UIViewController，重写ipad的自动旋转行为，代码如下：

      

using MonoTouch.UIKit;

namespace ipad01 {

          public class MyViewController:UIViewController {
                     public MyViewController() {
                     }

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

       5、在showViews.cs中添加如下代码

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

    var text = new UITextView();
    text.Text = "gwtGolden Gate Bridge,\nSan Francisco";
    text.Font = UIFont.FromName("Helvetica", 36f);
    text.Frame = new System.Drawing.RectangleF(200, 40, 400, 100);
    text.AutoresizingMask = UIViewAutoresizing.FlexibleLeftMargin | UIViewAutoresizing.FlexibleTopMargin |
              UIViewAutoresizing.FlexibleRightMargin | UIViewAutoresizing.FlexibleBottomMargin;
    text.ScrollEnabled = false;
    text.Editable = false;
    UIImage image = UIImage.FromFile("GoldenGate.jpg");
    UIImageView imageView = new UIImageView(image);
    var customScrollView = new UIScrollView(this.View.Bounds);
    customScrollView.AutoresizingMask = UIViewAutoresizing.FlexibleHeight
              | UIViewAutoresizing.FlexibleWidth;
    customScrollView.AddSubview(imageView);


    customScrollView.PagingEnabled = false; // freeform scrolling
    customScrollView.ContentSize = imageView.Frame.Size; 
    customScrollView.MaximumZoomScale = 4f;
    customScrollView.MinimumZoomScale = 0.25f;
    customScrollView.Bounces = false;
    customScrollView.BouncesZoom = false;
    customScrollView.IndicatorStyle = UIScrollViewIndicatorStyle.White;
    customScrollView.ViewForZoomingInScrollView = delegate (UIScrollView sender) {
              return imageView;
    };
    customScrollView.ContentOffset = new System.Drawing.PointF(250, 20);
    customScrollView.ZoomScale = 1.3f; //
    var customViewController = new MyViewController();
    customViewController.Add(customScrollView);
    customViewController.Add(text);
    this.View.Add(customViewController.View);}

        7，ok，将要使用的图像文件添入到项目，并保证其右键Build Action属性为Content。程序运行效果图如下：