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；

    

 1      UIWindow window;

 2      showViews shows;

 3 

 4      public override bool FinishedLaunching(UIApplication app, NSDictionary options) {

 5                 // create a new window instance based on the screen size

 6                 window = new UIWindow(UIScreen.MainScreen.Bounds);

 7                 shows = new showViews();

 8                 window.RootViewController = shows;

 9                 // If you have defined a view, add it here:

10                 // window.AddSubview (navigationController.View);

11 

12                 // make the window visible

13                 window.MakeKeyAndVisible();

14 

15                 return true;

16      }

       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

 1      public override void ViewDidLoad() {

 2     base.ViewDidLoad();

 3 

 4     var text = new UITextView();

 5     text.Text = "gwtGolden Gate Bridge,\nSan Francisco";

 6     text.Font = UIFont.FromName("Helvetica", 36f);

 7     text.Frame = new System.Drawing.RectangleF(200, 40, 400, 100);

 8     text.AutoresizingMask = UIViewAutoresizing.FlexibleLeftMargin | UIViewAutoresizing.FlexibleTopMargin |

 9               UIViewAutoresizing.FlexibleRightMargin | UIViewAutoresizing.FlexibleBottomMargin;

10     text.ScrollEnabled = false;

11     text.Editable = false;

12     UIImage image = UIImage.FromFile("GoldenGate.jpg");

13     UIImageView imageView = new UIImageView(image);

14     var customScrollView = new UIScrollView(this.View.Bounds);

15     customScrollView.AutoresizingMask = UIViewAutoresizing.FlexibleHeight

16               | UIViewAutoresizing.FlexibleWidth;

17     customScrollView.AddSubview(imageView);

18 

19 

20     customScrollView.PagingEnabled = false; // freeform scrolling

21     customScrollView.ContentSize = imageView.Frame.Size; 

22     customScrollView.MaximumZoomScale = 4f;

23     customScrollView.MinimumZoomScale = 0.25f;

24     customScrollView.Bounces = false;

25     customScrollView.BouncesZoom = false;

26     customScrollView.IndicatorStyle = UIScrollViewIndicatorStyle.White;

27     customScrollView.ViewForZoomingInScrollView = delegate (UIScrollView sender) {

28               return imageView;

29     };

30     customScrollView.ContentOffset = new System.Drawing.PointF(250, 20);

31     customScrollView.ZoomScale = 1.3f; //

32     var customViewController = new MyViewController();

33     customViewController.Add(customScrollView);

34     customViewController.Add(text);

35     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：