C# UIButton.AddTarget方法代码示例

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

            var button = new UIButton (UIButtonType.System);
            button.Frame = new CGRect(20, this.View.Center.Y - 22, this.View.Frame.Width-40, 44);
            button.AutoresizingMask = UIViewAutoresizing.FlexibleWidth | UIViewAutoresizing.FlexibleTopMargin | UIViewAutoresizing.FlexibleBottomMargin;
            button.SetTitle ("Load 10000 items", UIControlState.Normal);
            button.AddTarget ((object sender, EventArgs e) => {
                int systemVersion = int.Parse(UIDevice.CurrentDevice.SystemVersion.Split('.')[0]);
                if (systemVersion < 9) {
                    var alert = new TKAlert();
                    alert.Title = "Telerik UI";
                    alert.Message = "TKListView is optimized for performance when using dynamic item sizing only when running on iOS 9 and upper!";
                    alert.AddAction(new TKAlertAction("OK", (TKAlert arg1, TKAlertAction arg2) => {
                        this.CreateListView();
                        return true;
                    }));
                    alert.Show(true);
                }
                else {
                    this.CreateListView();
                }

                ((UIView)sender).RemoveFromSuperview();

            }, UIControlEvent.TouchUpInside);
            this.View.AddSubview(button);
        }

        private void Setup()
        {
            //Label
            autocompleteLabel = new UILabel(CGRect.Empty);
            autocompleteLabel.Font = this.Font;
            autocompleteLabel.BackgroundColor = UIColor.Clear;
            autocompleteLabel.TextColor = UIColor.LightGray;
            autocompleteLabel.LineBreakMode = UILineBreakMode.Clip;
            autocompleteLabel.Hidden = true;

            this.AddSubview(autocompleteLabel);
            this.BringSubviewToFront(autocompleteLabel);

            //Button
            autocompleteButton = new UIButton(UIButtonType.Custom);
            autocompleteButton.AddTarget(OnButtonCliced, UIControlEvent.TouchUpInside);
            autocompleteButton.SetImage(UIImage.FromBundle("autocompleteButton"), UIControlState.Normal);

            this.AddSubview(autocompleteButton);
            this.BringSubviewToFront(autocompleteButton);

            autocompleteString = string.Empty;

			NSNotificationCenter.DefaultCenter.AddObserver((NSString)UITextFieldTextDidChangeNotification, OnUITextFieldTextDidChangeNotification);
        }

		public void AddSiteUrl(RectangleF frame)
		{
			url = UIButton.FromType(UIButtonType.Custom);
			url.LineBreakMode = UILineBreakMode.TailTruncation;
			url.HorizontalAlignment = UIControlContentHorizontalAlignment.Left;
			url.TitleShadowOffset = new SizeF(0, 1);
			url.SetTitleColor(UIColor.FromRGB (0x32, 0x4f, 0x85), UIControlState.Normal);
			url.SetTitleColor(UIColor.Red, UIControlState.Highlighted);
			url.SetTitleShadowColor(UIColor.White, UIControlState.Normal);
			url.AddTarget(delegate { if (UrlTapped != null) UrlTapped (); }, UIControlEvent.TouchUpInside);
			
			// Autosize the bio URL to fit available space
			var size = _urlSize;
			var urlFont = UIFont.BoldSystemFontOfSize(size);
			var urlSize = new NSString(_bio.Url).StringSize(urlFont);
			var available = Util.IsPad() ? 400 : 185; // Util.IsRetina() ? 185 : 250;		
			while(urlSize.Width > available)
			{
				urlFont = UIFont.BoldSystemFontOfSize(size--);
				urlSize = new NSString(_bio.Url).StringSize(urlFont);
			}
			
			url.Font = urlFont;			
			url.Frame = new RectangleF ((float)_left, (float)70, (float)(frame.Width - _left), (float)size);
			url.SetTitle(_bio.Url, UIControlState.Normal);
			url.SetTitle(_bio.Url, UIControlState.Highlighted);			
			AddSubview(url);
		}

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

            this.View.BackgroundColor = UIColor.White;

            this.reservationForm = new ReservationForm ();
            this.dataSource = new TKDataFormEntityDataSourceHelper (this.reservationForm);
            this.dataFormDelegate = new CustomizationDataFormDelegate ();

            NSDateFormatter formatter = new NSDateFormatter ();
            formatter.DateFormat = "h:mm a";
            this.dataSource.PropertyWithName ("Time").Formatter = formatter;

            this.dataSource["Name"].Image = new UIImage ("guest-name.png");
            this.dataSource["Phone"].Image = new UIImage ("phone.png");
            this.dataSource["Date"].Image = new UIImage ("calendar.png");
            this.dataSource["Time"].Image = new UIImage ("time.png");
            this.dataSource["Guests"].Image = new UIImage ("guest-number.png");
            this.dataSource["Table"].Image = new UIImage ("table-number.png");

            this.dataSource["Name"].HintText = "Name";
            this.dataSource["Name"].ErrorMessage = @"Please fill in the guest name";
            this.dataSource["Time"].EditorClass = new ObjCRuntime.Class(typeof(TKDataFormTimePickerEditor));
            this.dataSource["Phone"].EditorClass = new ObjCRuntime.Class(typeof(CallEditor));
            this.dataSource ["Phone"].HintText = "Phone";
            this.dataSource["Origin"].EditorClass = new ObjCRuntime.Class(typeof(TKDataFormSegmentedEditor));

            this.dataSource["Guests"].ValuesProvider = new TKRange (new NSNumber(1), new NSNumber(10));
            this.dataSource["Section"].ValuesProvider = NSArray.FromStrings (new string[] {
                "Section 1",
                "Section 2",
                "Section 3",
                "Section 4"
            });
            this.dataSource["Table"].ValuesProvider = NSArray.FromStrings(new string[] { "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13", "14", "15" });
            this.dataSource["Origin"].ValuesProvider = NSArray.FromStrings (new string[] {
                "phone",
                "in-person",
                "online",
                "other"
            });

            this.dataSource.AddGroup ("RESERVATION DETAILS", new string[] { "Name", "Phone", "Date", "Time", "Guests" });
            this.dataSource.AddGroup ("TABLE DETAILS", new string[] { "Section", "Table" });
            this.dataSource.AddGroup ("ORIGIN", new string[] { "Origin" });

            this.DataForm.BackgroundColor = UIColor.FromPatternImage (new UIImage ("wood-pattern.png"));
            this.DataForm.Frame = new CGRect (0, 0, this.View.Bounds.Size.Width, this.View.Bounds.Size.Height - 66);
            this.DataForm.TintColor = new UIColor (0.780f, 0.2f, 0.223f, 1.0f);
            this.DataForm.Delegate = this.dataFormDelegate;
            this.DataForm.WeakDataSource = this.dataSource.NativeObject;

            btn = new UIButton (new CGRect (0, this.DataForm.Frame.Size.Height, this.View.Bounds.Size.Width, 66));
            btn.SetTitle ("Cancel Reservation", UIControlState.Normal);
            btn.SetTitleColor (new UIColor (0.780f, 0.2f, 0.223f, 1.0f), UIControlState.Normal);
            btn.AddTarget (this, new ObjCRuntime.Selector ("CancelReservation"), UIControlEvent.TouchUpInside);
            this.View.AddSubview (btn);
        }

        public void LoadButtons()
        {
            pauseButton = new UIButton(UIButtonType.RoundedRect); pauseButton.Frame = new CGRect(78,291,180,40); pauseButton.SetTitle("Pause",UIControlState.Normal);
            resumeButton = new UIButton(UIButtonType.RoundedRect); resumeButton.Frame = new CGRect(78,346,180,40); resumeButton.SetTitle("Resume",UIControlState.Normal);

            pauseButton.AddTarget(ClickedPause,UIControlEvent.TouchUpInside);
            resumeButton.AddTarget(ClickedResume,UIControlEvent.TouchUpInside);

            View.AddSubview(pauseButton);
            View.AddSubview(resumeButton);
        }

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

            UIButton button = new UIButton (UIButtonType.System);
            button.SetTitle ("Tap to load iOS 7 style calendar", UIControlState.Normal);
            button.AddTarget (this, new Selector ("ButtonTouched"), UIControlEvent.TouchUpInside);
            button.Frame = new CGRect (0, this.View.Bounds.Size.Height / 2f - 20f, this.View.Bounds.Size.Width, 40f);
            button.AutoresizingMask = UIViewAutoresizing.FlexibleBottomMargin | UIViewAutoresizing.FlexibleTopMargin |
            UIViewAutoresizing.FlexibleLeftMargin | UIViewAutoresizing.FlexibleRightMargin;

            this.View.AddSubview (button);
        }

 public void CreateButton(string title, NSObject target, Selector selector, CGPoint origin)
 {
     NSString titleString = new NSString (title);
     UIStringAttributes attributes = new UIStringAttributes () { Font = UIFont.SystemFontOfSize (18) };
     CGSize titleSize = titleString.GetSizeUsingAttributes(attributes);
     UIButton button = new UIButton (new CGRect (origin.X, origin.Y, titleSize.Width, 44));
     button.TitleLabel.Font = UIFont.SystemFontOfSize (14);
     button.Layer.BorderWidth = 1.0f;
     button.Layer.BorderColor = UIColor.White.CGColor;
     button.Layer.CornerRadius = 3.0f;
     button.SetTitle (title, UIControlState.Normal);
     button.SetTitleColor (UIColor.White, UIControlState.Normal);
     button.AddTarget (target, selector, UIControlEvent.TouchUpInside);
     this.SideDrawerView.MainView.AddSubview (button);
 }

		public static UIButton Button(UIView View, String Title, Object Target, EventHandler handler)
		{
			UIButton btn = new UIButton (UIButtonType.Custom);
			btn.BackgroundColor = new UIColor (0.5f, 0.7f, 0.2f, 1f);
			btn.SetTitleColor (new UIColor (1f, 1f, 1f, 1f), UIControlState.Normal);
			btn.SetTitle (Title, UIControlState.Normal);
			btn.TitleLabel.Font = UIFont.SystemFontOfSize (12);
			btn.Layer.CornerRadius = 40;
			btn.ClipsToBounds = true;
			btn.Frame = new CGRect ((View.Frame.Size.Width - 80)/2, View.Frame.Size.Height - 180, 80, 80);
			btn.AutoresizingMask = UIViewAutoresizing.FlexibleRightMargin | UIViewAutoresizing.FlexibleTopMargin | UIViewAutoresizing.FlexibleLeftMargin;
			btn.AddTarget(handler, UIControlEvent.TouchUpInside);
			View.AddSubview (btn);
			return btn;
		}

 public void CreateButton(string title, NSObject target, Selector selector)
 {
     NSString titleString = new NSString (title);
     UIStringAttributes attributes = new UIStringAttributes () { Font = UIFont.SystemFontOfSize (18) };
     CGSize titleSize = titleString.GetSizeUsingAttributes(attributes);
     UIButton button = new UIButton (new CGRect (15, 15 + buttonY, titleSize.Width, 44));
     button.TitleLabel.Font = UIFont.SystemFontOfSize (14);
     button.Layer.BorderWidth = 1.0f;
     button.Layer.BorderColor = UIColor.White.CGColor;
     button.Layer.CornerRadius = 3.0f;
     button.SetTitle (title, UIControlState.Normal);
     button.SetTitleColor (UIColor.White, UIControlState.Normal);
     button.AddTarget (target, selector, UIControlEvent.TouchUpInside);
     scrollView.AddSubview (button);
     buttonY += 50;
     scrollView.ContentSize = new CGSize (Math.Max (button.Frame.Width, scrollView.ContentSize.Width), buttonY + 15 + this.View.Bounds.Y);
 }

		public NotificationBar (NSCoder coder)
			: base (coder)
		{
			heightConstraint = NSLayoutConstraint.Create (this, Height, Equal, null, NoAttribute, 1, 0);
			TranslatesAutoresizingMaskIntoConstraints = false;
			BackgroundColor = UIColor.Black;

			AddConstraint (heightConstraint);
			label = new UILabel {
				Text = "You have a new CloudKit notification!",
				TextColor = UIColor.White,
				TextAlignment = UITextAlignment.Center,
				TranslatesAutoresizingMaskIntoConstraints = false,
				Hidden = true,
				UserInteractionEnabled = true
			};
			AddSubview (label);

			button = new UIButton ();
			button.SetTitle ("✕", UIControlState.Normal);
			button.AddTarget (Close, UIControlEvent.TouchDown);
			button.TranslatesAutoresizingMaskIntoConstraints = false;
			button.Hidden = true;

			AddSubview (button);

			var rightConstraint = NSLayoutConstraint.Create (this, RightMargin, Equal, button, Right, 1, 0);
			AddConstraint (rightConstraint);

			var centerConstraint = NSLayoutConstraint.Create (this, CenterY, Equal, button, CenterY, 1, 0);
			AddConstraint (centerConstraint);

			var leftConstraint = NSLayoutConstraint.Create (this, LeftMargin, Equal, label, Left, 1, 0);
			AddConstraint (leftConstraint);

			var rightLabelConstraint = NSLayoutConstraint.Create (button, Left, Equal, label, Right, 1, 8);
			AddConstraint (rightLabelConstraint);

			var centerLabelConstraint = NSLayoutConstraint.Create (this, CenterY, Equal, label, CenterY, 1, 0);
			AddConstraint (centerLabelConstraint);

			var tapGestureRecognizer = new UITapGestureRecognizer (ShowNotification);
			label.AddGestureRecognizer (tapGestureRecognizer);
		}

		private void SetupMainButton ()
		{
			mainButton = new UIButton (UIButtonType.System);
			mainButton.TitleLabel.Font = UIFont.SystemFontOfSize (80);

			mainButton.SetTitle (SingleWord, UIControlState.Normal);
			mainButton.SizeToFit ();
			mainButton.TranslatesAutoresizingMaskIntoConstraints = false;

			mainButton.AddTarget (this, new Selector ("PrintWord"), UIControlEvent.TouchUpInside);

			View.AddSubview (mainButton);

			var mainButtonCenterXSideConstraint = NSLayoutConstraint.Create (mainButton, NSLayoutAttribute.CenterX, NSLayoutRelation.Equal, View, NSLayoutAttribute.CenterX, 1.0f, 0.0f);
			var mainButtonCenterYsConstraint = NSLayoutConstraint.Create (mainButton, NSLayoutAttribute.CenterY, NSLayoutRelation.Equal, View, NSLayoutAttribute.CenterY, 1.0f, 0.0f);
			View.AddConstraints (new [] {
				mainButtonCenterXSideConstraint,
				mainButtonCenterYsConstraint
			});
		}

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

            // Perform custom UI setup here
            nextKeyboardButton = new UIButton (UIButtonType.System);

            nextKeyboardButton.SetTitle ("Next Keyboard", UIControlState.Normal);
            nextKeyboardButton.SizeToFit ();
            nextKeyboardButton.TranslatesAutoresizingMaskIntoConstraints = false;

            nextKeyboardButton.AddTarget (this, new Selector ("advanceToNextInputMode"), UIControlEvent.TouchUpInside);

            View.AddSubview (nextKeyboardButton);

            var nextKeyboardButtonLeftSideConstraint = NSLayoutConstraint.Create (nextKeyboardButton, NSLayoutAttribute.Left, NSLayoutRelation.Equal, View, NSLayoutAttribute.Left, 1.0f, 0.0f);
            var nextKeyboardButtonBottomConstraint = NSLayoutConstraint.Create (nextKeyboardButton, NSLayoutAttribute.Bottom, NSLayoutRelation.Equal, View, NSLayoutAttribute.Bottom, 1.0f, 0.0f);
            View.AddConstraints (new [] {
                nextKeyboardButtonLeftSideConstraint,
                nextKeyboardButtonBottomConstraint
            });
        }

        protected override void PrepareDialogViewController(UIViewController dvc)
        {
            base.PrepareDialogViewController (dvc);

            NavigationBarLabel = InterfaceHelper.LabelForTitle (Caption.ToUpper());
            dvc.NavigationItem.TitleView = NavigationBarLabel;

            var backButton = new UIButton (new RectangleF (0, 0, 25, 25));
            backButton.SetBackgroundImage (UIImage.FromFile ("Images/General/BackButton.png"), UIControlState.Normal);
            backButton.SetBackgroundImage (UIImage.FromFile ("Images/General/BackButtonHighlighted.png"), UIControlState.Highlighted);
            backButton.AddTarget((object sender, EventArgs args) => GoBack(dvc),
                UIControlEvent.TouchUpInside);

            BackButton = new UIBarButtonItem (backButton);
            dvc.NavigationItem.LeftBarButtonItem = BackButton;
        }

        public override UITableViewCell GetCell(UITableView tableView, NSIndexPath indexPath )
        {
            // get cell to reuse or create new one.
            UITableViewCell cell;
            if (rssType == ListViewControllerRSSType.BNRFeed) {
                cell = tableView.DequeueReusableCell("UITableViewCellBNR");
                if (cell == null) {
                    cell = new UITableViewCell(UITableViewCellStyle.Subtitle, "UITableViewCellBNR");
                }
            }
            else {
                cell = tableView.DequeueReusableCell("UITableViewCellApple");
                if (cell == null) {
                    cell = new UITableViewCell(UITableViewCellStyle.Subtitle, "UITableViewCellApple");
                }
            }

            // Get item and initialize cell with item info
            RSSItem item = BNRFeedStore.items[indexPath.Row];
            cell.TextLabel.Text = item.title;
            cell.TextLabel.TextColor = UIColor.Yellow;
            cell.DetailTextLabel.Text = item.subForum;
            cell.DetailTextLabel.TextColor = UIColor.Yellow;
            cell.UserInteractionEnabled = true;
            cell.BackgroundColor = UIColor.Clear;
            cell.Accessory = UITableViewCellAccessory.None;
            cell.SelectedBackgroundView = new UIView(){
                Frame = cell.Frame,
                BackgroundColor = UIColor.FromRGB(0.3f, 0.3f, 0.3f)
            };

            // For BNRFeed list. set up Favbutton, check if favorite, decorate button accordingly, add to cell view
            if (rssType == ListViewControllerRSSType.BNRFeed) {
                UIButton favButton = new UIButton(UIButtonType.RoundedRect);

                favButton.Frame = new CGRect(cell.Frame.Size.Width-17, 0, 17, 44);
                favButton.AddTarget(this, new Selector("favButtonPressed:"), UIControlEvent.TouchUpInside);
                favButton.SetTitle("F", UIControlState.Normal);
                favButton.SetTitleColor(UIColor.White, UIControlState.Normal);
                favButton.BackgroundColor = UIColor.FromRGB(0.3f, 0.3f, 0.3f);
                favButton.Tag = indexPath.Row;
                favButton.AutoresizingMask = UIViewAutoresizing.FlexibleLeftMargin;
                cell.BringSubviewToFront(favButton);

                if (item.isFavorite) {
                    favButton.SetTitleColor(UIColor.Green, UIControlState.Normal);
                    favButton.BackgroundColor = UIColor.FromRGB(0.4f, 0.4f, 0.4f);
                }
                cell.AddSubview(favButton);
            }

            // Set checkmark for read items.
            if (item.isRead)
                cell.Accessory = UITableViewCellAccessory.Checkmark;

            return cell;
        }

        private void SetupNavigationBar()
        {
            var backButton = new UIButton (new RectangleF (0, 0, 25, 25));
            backButton.SetBackgroundImage (UIImage.FromFile (Images.BackButton), UIControlState.Normal);
            backButton.SetBackgroundImage (UIImage.FromFile (Images.BackButtonHighlighted), UIControlState.Highlighted);
            backButton.AddTarget(HandleBackButtonTapped, UIControlEvent.TouchUpInside);

            backNavigationButton = new UIBarButtonItem (backButton);
            NavigationItem.LeftBarButtonItem = backNavigationButton;
        }