C# UIImageView.SetImage方法代码示例

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

            View.BackgroundColor = UIColor.White;
            ImageView = new UIImageView (View.Bounds) {
                ContentMode = UIViewContentMode.ScaleAspectFit
            };

            View.AddSubview (ImageView);

            if (ImageUrl != null) {
                ImageView.SetImage (ImageUrl, null, SDWebImageOptions.ProgressiveDownload, ProgressHandler, CompletedHandler);
            }
        }

        public async override void ViewDidLoad()
        {
            try {
                this.InitLeftButton();
                LongRunning = true;
                Title = "Site Info";

                base.ViewDidLoad();

                var site = await ServiceProxy.GetSiteInfo(_siteName);

                var statistics = site.items[0];

                var imageView = new UIImageView(new RectangleF(0, 0, View.Frame.Width, 60));
                imageView.ContentMode = UIViewContentMode.ScaleAspectFit;
                imageView.SetImage(new MonoTouch.Foundation.NSUrl(statistics.site.logo_url));

                AddTableHeader(imageView);

                AddRow(new SubtitleDynamicRow { 
                    Text = statistics.site.NameDecoded,
                    Details = statistics.site.AudienceDecoded
                });

                AddSubtitleFixedRow("Site Url", statistics.site.site_url);
                AddValue1FixedRow("Launch Date", BclEx.UnixToDate(statistics.site.launch_date).ToString("d MMM yyyy"));
                AddRow(new DefaultFixedRow { 
                    Accessory = UITableViewCellAccessory.DisclosureIndicator,
                    Text = "View Moderators", 
                    NavController = () => new ModeratorsController()
                });

                AddHeaderRow("Site statistics");
                AddValue1FixedRow("Total Questions", statistics.total_questions.ToString());
                AddValue1FixedRow("Unanswered Questions", statistics.total_unanswered.ToString());
                AddValue1FixedRow("Total Answers", statistics.total_answers.ToString());
                AddValue1FixedRow("Accepted Answers", statistics.total_accepted.ToString());
                AddValue1FixedRow("Total Comments", statistics.total_comments.ToString());
                AddValue1FixedRow("Total Users", statistics.total_users.ToString());
                AddValue1FixedRow("New Active Users", statistics.new_active_users.ToString());
                AddValue1FixedRow("Total Votes", statistics.total_votes.ToString());
                AddValue1FixedRow("Total Badges", statistics.total_badges.ToString());
                AddValue1FixedRow("Badges per minute", statistics.badges_per_minute.ToString());
                AddValue1FixedRow("Questions per minute", statistics.questions_per_minute.ToString());
                AddValue1FixedRow("Answers per minute", statistics.answers_per_minute.ToString());

                AddHeaderRow("Developer info");
                AddValue1FixedRow("API Revision", statistics.api_revision);
                AddValue1FixedRow("API Site Param", statistics.site.api_site_parameter);
                AddSubtitleFixedRow("Markdown Extensions", statistics.site.markdown_extensions.JoinStrings(", "));

                if (statistics.site.aliases != null && statistics.site.aliases.Any())
                    AddSubtitleDynamicRow("Aliases", statistics.site.aliases.JoinStrings(", "));

                AddValue1FixedRow("Site State", statistics.site.site_state);
                AddValue1FixedRow("Site Type", statistics.site.site_type);

                ForceReloadData();
            }
            catch (Exception ex) {
                this.UnhandledError(ex);
            }
        }

		private void OnRequestHeaderImages (List<string> images)
		{
			var defaultImage = UIImage.FromFile (ViewModel.DefaultAccountImageName);

			AccountImageView.Hidden = images.Count == 0;

			// clear all existing entries before beginning
			foreach (UIView view in AccountsView.Subviews) {
				if(!view.Equals(AccountImageView)) {
					AccountsView.RemoveConstraints (view.Constraints);
					view.RemoveFromSuperview ();
				}
			}

			if(images.Count > 0) 
			{
				// proceed and add the new ones
				var prevImageView = AccountImageView;
				var prevTrailingConstraint = AccountImageViewTrailingConstraint;
				var rect = CGRect.FromLTRB (prevImageView.Frame.X + 2, prevImageView.Frame.Y + 2, prevImageView.Frame.Width - 4, prevImageView.Frame.Height - 4);
				var path = UIBezierPath.FromRoundedRect (rect, prevImageView.Frame.Height / 2);
				var prevMaskLayer = new CAShapeLayer ();

				if(!AccountsView.Constraints.Contains(AccountImageViewTrailingConstraint))
				{
					AccountsView.AddConstraint (AccountImageViewTrailingConstraint);
				}

				prevMaskLayer.Path = path.CGPath;
				prevMaskLayer.ShadowColor = UIColor.Black.CGColor;
				prevMaskLayer.ShadowOpacity = 0.35f;
				prevMaskLayer.ShadowOffset = new CGSize (0, 1);
				prevMaskLayer.ShadowRadius = 2;
				prevMaskLayer.ShadowPath = path.CGPath;

				prevImageView.ClipsToBounds = false;
				prevImageView.Layer.Mask = prevMaskLayer;
				prevImageView.Layer.MasksToBounds = false;
				prevImageView.SetImage (new NSUrl(images [0]), defaultImage);	

				images.RemoveAt (0);
				AccountsView.Layer.MasksToBounds = false;
				AccountsView.ClipsToBounds = false;

				foreach (string imageUrl in images)
				{
					var imageView = new UIImageView ();
					var maskLayer = new CAShapeLayer ();

					maskLayer.Path = path.CGPath;
					maskLayer.ShadowColor = prevMaskLayer.ShadowColor;
					maskLayer.ShadowOpacity = prevMaskLayer.ShadowOpacity;
					maskLayer.ShadowOffset = prevMaskLayer.ShadowOffset;
					maskLayer.ShadowRadius = prevMaskLayer.ShadowRadius;
					maskLayer.ShadowPath = prevMaskLayer.ShadowPath;

					imageView.ClipsToBounds = prevImageView.ClipsToBounds;
					imageView.Layer.Mask = maskLayer;
					imageView.Layer.MasksToBounds = prevImageView.Layer.MasksToBounds;
					imageView.TranslatesAutoresizingMaskIntoConstraints = false;

					imageView.SetImage (new NSUrl (imageUrl), defaultImage);

					var heightConstraint = NSLayoutConstraint.Create (imageView, NSLayoutAttribute.Height, NSLayoutRelation.Equal, null, NSLayoutAttribute.NoAttribute, 1, prevImageView.Frame.Height);
					var widthConstraint = NSLayoutConstraint.Create (imageView, NSLayoutAttribute.Width, NSLayoutRelation.Equal, null, NSLayoutAttribute.NoAttribute, 1, prevImageView.Frame.Width);
					var leadingConstraint = NSLayoutConstraint.Create (imageView, NSLayoutAttribute.Leading, NSLayoutRelation.Equal, prevImageView, NSLayoutAttribute.Trailing, 1, -prevImageView.Frame.Width/2);
					var centerYConstraint = NSLayoutConstraint.Create (imageView, NSLayoutAttribute.CenterY, NSLayoutRelation.Equal, AccountsView, NSLayoutAttribute.CenterY, 1, 0);
					var trailingConstraint = NSLayoutConstraint.Create (imageView, NSLayoutAttribute.Trailing, NSLayoutRelation.Equal, AccountsView, NSLayoutAttribute.Trailing, 1, 0);	

					AccountsView.AddSubview (imageView);
					AccountsView.SendSubviewToBack (imageView);

					AccountsView.RemoveConstraint (prevTrailingConstraint);
					AccountsView.AddConstraint (heightConstraint);
					AccountsView.AddConstraint (widthConstraint);
					AccountsView.AddConstraint (leadingConstraint);
					AccountsView.AddConstraint (centerYConstraint);
					AccountsView.AddConstraint (trailingConstraint);

					prevMaskLayer = maskLayer;
					prevImageView = imageView;
					prevTrailingConstraint = trailingConstraint;
				}
				AccountsView.LayoutIfNeeded ();
			}
		}

 public static void MakeImageFromURL(UIImageView imageHolder, string url)
 {
     // using SDWebImage to lazy load and
     // cache the images
     imageHolder.SetImage (new NSUrl (url));
 }