C# UIButton.SetImage方法代码示例

		public void SetBitmapItems(UIImage[] unselectedImages, UIImage[] selectedImages)
		{
			_segmentCount = unselectedImages.Length;
			
			// set the new frame size
			Frame = new RectangleF(Frame.Left, Frame.Top, BUTTON_WIDTH * unselectedImages.Length, BUTTON_WIDTH);
			
			// kill the old views
			foreach (var view in Subviews)
				view.RemoveFromSuperview();
			
			// add the new views	
			for (int ii = 0; ii < unselectedImages.Length; ii++)
			{
				UIButton view = new UIButton(new RectangleF(BUTTON_WIDTH * ii, 0, BUTTON_WIDTH, BUTTON_WIDTH))
					{ BackgroundColor = UIColor.White };

				view.SetImage(unselectedImages[ii], UIControlState.Normal);
				
				if (selectedImages != null && selectedImages.Length > ii)
					view.SetImage(selectedImages[ii], UIControlState.Selected);

				//var index = ii;
				view.TouchUpInside += delegate(object sender, EventArgs e) {
					handleSelection(sender as UIButton);
				};	
				AddSubview(view);
			}
		}

        public override void ViewWillAppear(bool animated)
        {
            base.ViewWillAppear (animated);

            if (centerButton == null){

                centerButton = UIButton.FromType(UIButtonType.Custom);
                centerButton.AutoresizingMask = UIViewAutoresizing.FlexibleRightMargin | UIViewAutoresizing.FlexibleLeftMargin | UIViewAutoresizing.FlexibleBottomMargin | UIViewAutoresizing.FlexibleTopMargin;
                centerButton.SetImage(normalState, UIControlState.Normal);
                centerButton.SetImage(highlightedState, UIControlState.Highlighted);
                centerButton.Frame = new RectangleF(0,0,normalState.Size.Width, normalState.Size.Height);
                PointF center = TabBar.Center;
                center.Y = (TabBar.Frame.Size.Height / 2.0f);

                centerButton.Center = center;

                if (Tapped != null){
                    centerButton.TouchUpInside += delegate(object sender, EventArgs e) {
                        Tapped();
                    };
                }
                this.TabBar.AddSubview(centerButton);
                this.TabBar.BringSubviewToFront(centerButton);

                Console.WriteLine(centerButton.Center);
                //this.View.AddSubview(centerButton);
                //this.View.BringSubviewToFront(centerButton);
            }
        }

		private void SetButtonImage(UIButton button, string imageurl, string placeholderurl)
		{
			if(File.Exists(imageurl))
				button.SetImage(new UIImage(imageurl), UIControlState.Normal);
			else if(File.Exists(placeholderurl))
				button.SetImage(new UIImage(placeholderurl), UIControlState.Normal);
			
			button.Layer.MasksToBounds = true;
			button.Layer.CornerRadius = 5.0f;
		}

 public static void SetButtonBackground(UIButton button, bool value)
 {
     if (value)
     {
         button.SetImage(YesImage, UIControlState.Normal);
     }
     else
     {
         button.SetImage(NoImage, UIControlState.Normal);
     }
 }

        public override void LoadView ()
        {
            base.LoadView ();
            window = AppDelegate.TogglWindow;
            View.BackgroundColor = UIColor.White;

            _panGesture = new UIPanGestureRecognizer (OnPanGesture) {
                CancelsTouchesInView = true
            };

            menuButtons = new[] {
                (logButton = new UIButton ()),
                (reportsButton = new UIButton ()),
                (settingsButton = new UIButton ()),
                (feedbackButton = new UIButton ()),
                (signOutButton = new UIButton ()),
            };
            logButton.SetTitle ("LeftPanelMenuLog".Tr (), UIControlState.Normal);
            logButton.SetImage (Image.TimerButton, UIControlState.Normal);
            logButton.SetImage (Image.TimerButtonPressed, UIControlState.Highlighted);

            reportsButton.SetTitle ("LeftPanelMenuReports".Tr (), UIControlState.Normal);
            reportsButton.SetImage (Image.ReportsButton, UIControlState.Normal);
            reportsButton.SetImage (Image.ReportsButtonPressed, UIControlState.Highlighted);

            settingsButton.SetTitle ("LeftPanelMenuSettings".Tr (), UIControlState.Normal);
            settingsButton.SetImage (Image.SettingsButton, UIControlState.Normal);
            settingsButton.SetImage (Image.SettingsButtonPressed, UIControlState.Highlighted);

            feedbackButton.SetTitle ("LeftPanelMenuFeedback".Tr (), UIControlState.Normal);
            feedbackButton.SetImage (Image.FeedbackButton, UIControlState.Normal);
            feedbackButton.SetImage (Image.FeedbackButtonPressed, UIControlState.Highlighted);

            signOutButton.SetTitle ("LeftPanelMenuSignOut".Tr (), UIControlState.Normal);
            signOutButton.SetImage (Image.SignoutButton, UIControlState.Normal);
            signOutButton.SetImage (Image.SignoutButtonPressed, UIControlState.Highlighted);

            logButton.HorizontalAlignment = reportsButton.HorizontalAlignment = settingsButton.HorizontalAlignment =
                                                feedbackButton.HorizontalAlignment = signOutButton.HorizontalAlignment = UIControlContentHorizontalAlignment.Left;

            var authManager = ServiceContainer.Resolve<AuthManager> ();
            authManager.PropertyChanged += OnUserLoad;

            foreach (var button in menuButtons) {
                button.Apply (Style.LeftView.Button);
                button.TouchUpInside += OnMenuButtonTouchUpInside;
                View.AddSubview (button);
            }

            View.SubviewsDoNotTranslateAutoresizingMaskIntoConstraints();
            View.AddConstraints (MakeConstraints (View));
            View.AddGestureRecognizer (_panGesture);
        }

		public override void ViewDidLoad ()
		{
			base.ViewDidLoad ();
			Title = "Buttons";
			View.BackgroundColor = UIColor.White;
			
			buttonStarRect = UIButton.FromType(UIButtonType.RoundedRect);
			buttonStarRect.SetImage (UIImage.FromFile ("star-gold45.png"), UIControlState.Normal);
			buttonStarRect.SetImage (UIImage.FromFile ("star-grey45.png"), UIControlState.Disabled);

			buttonStarRect.Frame = new CGRect(160, 20, 45, 42);
			buttonStarRect.TouchUpInside += HandleTouchUpInside;
			

			buttonStarCustom = UIButton.FromType(UIButtonType.Custom);
			buttonStarCustom.SetImage (UIImage.FromFile ("star-gold45.png"), UIControlState.Normal);
			buttonStarCustom.SetImage (UIImage.FromFile ("star-gold45_sel.png"), UIControlState.Highlighted);
			buttonStarCustom.SetImage (UIImage.FromFile ("star-grey45.png"), UIControlState.Disabled);

			buttonStarCustom.Frame = new CGRect(160, 70, 45, 42);
			buttonStarCustom.TouchUpInside += HandleTouchUpInside;


			switchEnabled = new UISwitch(new CGRect(140, 130, 50, 30));
			switchEnabled.ValueChanged += (sender, e) => {
				buttonStarRect.Enabled = switchEnabled.On;
				buttonStarCustom.Enabled = switchEnabled.On;
			};
			switchEnabled.On = true;


			#region Not related to sample
			rectLabel = new UILabel(new CGRect(10, 20, 150, 30));
			rectLabel.Text = "RoundedRect:";
			customLabel = new UILabel(new CGRect(10, 70, 150, 30));
			customLabel.Text = "Custom:";
			switchLabel = new UILabel(new CGRect(10, 130, 150, 30));
			switchLabel.Text = "Enabled:";
			View.AddSubview (rectLabel);
			View.AddSubview (customLabel);
			View.AddSubview (switchLabel);
			#endregion

			View.AddSubview (buttonStarRect);
			View.AddSubview (buttonStarCustom);
			View.AddSubview (switchEnabled);

		}

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

			scrollView = new UIScrollView {
				BackgroundColor = UIColor.Black,
				Frame = new CGRect (0, 0, 320, View.Bounds.Height * 3)
			};

			hamburgerMenu = new UIButton {
				Frame = new CGRect (10, 10, 25, 25)
			};
			hamburgerMenu.SetImage (UIImage.FromFile ("HamburgerMenu.png"), UIControlState.Normal);
			hamburgerMenu.TouchUpInside += (sender, e) => {
				flyout.ToggleMenu ();
			};

			photoGalleryView = new PhotoGalleryView (View.Bounds) {
				Frame = new CGRect (0, 0, View.Bounds.Width, View.Bounds.Height)
			};

			scrollView.Add (photoGalleryView);
			scrollView.Add (hamburgerMenu);

			View.Add (scrollView);
		}

        /// <summary>
        /// Calls when view are loaded 
        /// </summary>
        public override void ViewDidLoad()
        {
            base.ViewDidLoad();

            // Create toolbar, title label and button
            var toolBar = new UIToolbar(new RectangleF(0, 0, View.Bounds.Width, 44));
            toolBar.AutoresizingMask = UIViewAutoresizing.FlexibleWidth | UIViewAutoresizing.FlexibleBottomMargin;
            toolBar.BarStyle = UIBarStyle.Black;
            var toolBarTitle = new UILabel(new RectangleF(0, 0, View.Bounds.Width, 44));
            toolBarTitle.AutoresizingMask = UIViewAutoresizing.FlexibleWidth;
            toolBarTitle.BackgroundColor = UIColor.Clear;
            toolBarTitle.TextAlignment = UITextAlignment.Center;
            toolBarTitle.TextColor = UIColor.White;
            toolBarTitle.Font = UIFont.SystemFontOfSize(18.0f);
            toolBarTitle.Text = "Note".t();
            var btnNavigate = new UIButton(new RectangleF(5, 5, 30, 30));
            btnNavigate.SetImage(UIImage.FromFile("Images/Toolbar/Save32.png"), UIControlState.Normal);
            btnNavigate.TouchUpInside += delegate {
                mNote.Note = mNoteTxt.Text;
                DocumentNoteManager.Instance.SaveNote(mNote);
                CallbackAction(mNoteTxt);
                mPopoverController.Dismiss(true);
            };
            toolBar.AddSubview(toolBarTitle);
            toolBar.AddSubview(btnNavigate);
            View.AddSubview(toolBar);

            // Create text note
            mNoteTxt = new UITextView(new RectangleF(0, 44, View.Bounds.Width, View.Bounds.Height));
            mNoteTxt.AutoresizingMask = UIViewAutoresizing.FlexibleWidth | UIViewAutoresizing.FlexibleHeight;
            mNoteTxt.Font = UIFont.SystemFontOfSize(17.0f);
            mNoteTxt.Text = mNote.Note;
            View.AddSubview(mNoteTxt);
        }

 private static UIView GetBackButton(float viewWidth, float viewHeight)
 {
     UIView view = new UIView(new RectangleF(0, viewHeight - BUTTONHEIGHT, BUTTONWIDTH, BUTTONHEIGHT));
     view.BackgroundColor = UIColor.Clear;
     UIButton button = new UIButton(new RectangleF(0, 0, BUTTONWIDTH, BUTTONHEIGHT));
     button.SetImage(BACKBUTTONIMAGEOUT, UIControlState.Normal);
     button.AdjustsImageWhenDisabled = false;
     button.AdjustsImageWhenHighlighted = false;
     UILabel backTitle = new UILabel(new RectangleF(50, 10, 60, 25));
     backTitle.Text = "返回";
     backTitle.TextColor = UIColor.FromRGB(255, 255, 255);
     backTitle.Font = UIFont.FromName(FONTFAMILY, 18);
     backTitle.TextAlignment = UITextAlignment.Center;
     backTitle.BackgroundColor = UIColor.Clear;
     button.Add(backTitle);
     button.TouchUpInside += (sender, e) =>
     {
         button.SetImage(BACKBUTTONIMAGEOUT, UIControlState.Normal);
         CloseTimePiker();
     };
     button.TouchDown += (sender, e) =>
     {
         button.SetImage(BACKBUTTONIMAGEIN, UIControlState.Normal);
     };
     button.TouchDragInside += (sender, e) =>
     {
         button.SetImage(BACKBUTTONIMAGEOUT, UIControlState.Normal);
     };
     view.Add(button);
     return view;
 }

        public override void ViewDidAppear(bool animated)
        {
            base.ViewWillAppear (animated);

            UINavigationController nav = NavigationController;
            MainViewController controller = (MainViewController)nav.ParentViewController; // MainViewController : ZUUIRevealController

            // Check if a UIPanGestureRecognizer already sits atop our NavigationBar.
            if (nav.NavigationBar.GestureRecognizers == null ||
                !(nav.NavigationBar.GestureRecognizers.Contains (navigationBarPanGestureRecognizer))) {
                // If not, allocate one and add it.
                UIPanGestureRecognizer panGestureRecognizer = new UIPanGestureRecognizer (controller.RevealGesture);
                navigationBarPanGestureRecognizer = panGestureRecognizer;

                NavigationController.NavigationBar.AddGestureRecognizer (navigationBarPanGestureRecognizer);
            }

            // Check if we have a revealButton already.
            if (NavigationItem.LeftBarButtonItem == null) {
                // If not, allocate one and add it.
                UIImage imageMenu = UIImage.FromFile ("action_menu.png");
                UIButton menuButton = new UIButton (UIButtonType.Custom);
                menuButton.SetImage (imageMenu, UIControlState.Normal);
                menuButton.Frame = new RectangleF (0.0f, 0.0f, (float)imageMenu.Size.Width, (float)imageMenu.Size.Height);
                menuButton.TouchUpInside += (sender, e) => controller.RevealToggle ();

                NavigationItem.LeftBarButtonItem = new UIBarButtonItem (menuButton);
            }
        }

        public ItemView(Item item)
        {
            this.item = item;
            AddSubview (button = new UIButton {
                ContentMode = UIViewContentMode.ScaleAspectFill,
                Layer = {
                    ShadowColor = UIColor.Black.CGColor,
                    ShadowRadius = .3f,
                    ShadowOpacity = .3f,
                    ShadowOffset = new SizeF (1f, 1),
                },
            });
            button.TouchUpInside += (object sender, EventArgs e) => onTap ();
            button.SetImage (image = ImageLoader.Load (item.Image).ImageWithRenderingMode (UIImageRenderingMode.AlwaysTemplate), UIControlState.Normal);

            label = new UILabel {
                AdjustsFontSizeToFitWidth = true,
                Font = UIFont.BoldSystemFontOfSize (100),
                TextAlignment = UITextAlignment.Center,
                Text = "0",
                Layer = {
                    ShadowColor = UIColor.Black.CGColor,
                    ShadowOpacity = .25f,
                    ShadowRadius = .3f,
                    ShadowOffset = new SizeF (1f, 1),
                }
            };
            xScale = (float)random.NextDouble ();
            yScale = (float)random.NextDouble ();
            var s = Math.Max (random.NextDouble (), .5);
            scale = (float)Math.Min (s, .9);
        }

        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);
        }

        private void BarcodeScan()
        {
            scanner = new MobileBarcodeScanner(this.NavigationController);
            //buttonDefaultScan = new UIButton(UIButtonType.RoundedRect);
            //buttonDefaultScan.Frame = new RectangleF(40, 150, 280, 40);

            //			buttonDefaultScan = new UIButton(UIButtonType.Custom) {
            //				Frame = new CGRect(View.Center.X - (View.Bounds.Width - 40) / 2, View.Center.Y - 50,  View.Bounds.Width - 40, 100),
            //				BackgroundColor = UIColor.FromRGB(0, 0.5f, 0),
            //			};
            UIButton buttonDefaultScan = new UIButton (
                new CoreGraphics.CGRect (20, View.Center.Y - 100, View.Bounds.Width - 40, 250));
            UIImage roundImage = new UIImage ("RoundButton60.png");
            buttonDefaultScan.SetImage (roundImage, UIControlState.Normal);
            buttonDefaultScan.BackgroundColor = UIColor.Clear;
            //			BizappTheme.Apply (buttonDefaultScan);

            //buttonDefaultScan.Frame = new RectangleF(40, View.Bounds.Height/2.0f, 280, 40);
            //			buttonDefaultScan.SetTitle("Scan Barcode", UIControlState.Normal);

            buttonDefaultScan.TouchUpInside += async (sender, e) =>
            {
                //Tell our scanner to use the default overlay
                scanner.UseCustomOverlay = false;
                //We can customize the top and bottom text of the default overlay
                scanner.TopText = "Hold camera up to barcode to scan";
                scanner.BottomText = "Barcode will automatically scan";

                //Start scanning
                var result = await scanner.Scan ();

                HandleScanResult(result);
            };
            this.View.AddSubview (buttonDefaultScan);
        }

		public DateTimeElement2 (string caption, DateTime date, DialogViewController dvc) : base (caption, null, null)
		{			
			this.Dvc = dvc;
			DateValue = date;
			
			// create picker elements
			datePicker = CreatePicker ();
			datePicker.Mode = UIDatePickerMode.DateAndTime; 
			datePicker.ValueChanged += delegate {
				DateValue = datePicker.Date;				
				Value = FormatDate(DateValue);
				RefreshValue();
				
				if (DateSelected != null)
					DateSelected (this);								
			};		
			
			//datePicker.Frame = PickerFrameWithSize (datePicker.SizeThatFits (SizeF.Empty));					
			closeBtn = new UIButton(new RectangleF(0,0,31,32));
			closeBtn.SetImage(UIImage.FromFile("Images/closebox.png"),UIControlState.Normal);
			closeBtn.TouchDown += delegate {
				HidePicker();
			};			
			datePicker.AddSubview(closeBtn);			
						
			Value = FormatDate (date);			
			
			this.Alignment = UITextAlignment.Left;
		}	

 public static void SetImageFor(string imagePath, UIButton button, UIControlState state)
 {
     using (UIImage img = UIImage.FromFile(imagePath)) {
         Assert.NotNull(img);
         button.SetImage(img, state);
     }
 }