mono touch中，UISlider控件的使用

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

namespace GCForum
{
	public class MyTestVC :UIViewController
	{
		public MyTestVC ()
		{
		}

		private UISlider _slider;
		public override void ViewDidLoad ()
		{
			base.ViewDidLoad ();
			this.View.BackgroundColor = UIColor.White;

			UILabel lbl = chongqing.ControlCenter.CreateLbl (new RectangleF (10, 100, 150, 20), "");
			this.View.Add (lbl);

			_slider = new UISlider {
				Frame = new RectangleF(10,10,this.View.Frame.Width-20,50)
			};
			_slider.MinValue = 0.0f;
			_slider.MaxValue = 20.0f;
			_slider.SetValue (10.0f, false);
			lbl.Text = _slider.Value.ToString ();

			//注册VlueChange事件
			_slider.ValueChanged += (s,e) => {
				lbl.Text = _slider.Value.ToString ();
			};

			this.View.Add (_slider);
		}

		//...

	}
}