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);}