C# UILabel.Below方法代码示例

        public override void ViewDidLoad()
        {
            View.BackgroundColor = UIColor.White;
            base.ViewDidLoad();

            var subTotal = new UITextField() { BorderStyle = UITextBorderStyle.RoundedRect };
            subTotal.KeyboardType = UIKeyboardType.DecimalPad;
            Add(subTotal);

            var seek = new UISlider()
                {
                    MinValue = 0,
                    MaxValue = 100,
                };
            Add(seek);

            var seekLabel = new UILabel();
            Add(seekLabel);

            var tipLabel = new UILabel();
            Add(tipLabel);

            var totalLabel = new UILabel();
            Add(totalLabel);

            var set = this.CreateBindingSet<TipView, TipViewModel>();
            set.Bind(subTotal).To(vm => vm.SubTotal);
            set.Bind(seek).To(vm => vm.Generosity);
            set.Bind(seekLabel).To(vm => vm.Generosity);
            set.Bind(tipLabel).To(vm => vm.Tip);
            set.Bind(totalLabel).To("SubTotal + Tip");
            set.Apply();

            View.SubviewsDoNotTranslateAutoresizingMaskIntoConstraints();

            var margin = 10;
            View.AddConstraints(
                    subTotal.AtLeftOf(View, margin),
                    subTotal.AtTopOf(View, margin),
                    subTotal.AtRightOf(View, margin),

                    seek.WithSameLeft(subTotal),
                    seek.Below(subTotal, margin),
                    seek.ToLeftOf(seekLabel, margin),
                    seek.WithRelativeWidth(seekLabel, 3),

                    seekLabel.WithSameRight(subTotal),
                    seekLabel.WithSameTop(seek),

                    tipLabel.Below(seek, margin),
                    tipLabel.WithSameLeft(seek),
                    tipLabel.WithSameWidth(totalLabel),

                    totalLabel.WithSameTop(tipLabel),
                    totalLabel.ToRightOf(tipLabel, margin),
                    totalLabel.WithSameRight(subTotal)
                );
        }

        public InfoViewController()
        {
            View.BackgroundColor = UIColor.FromPatternImage(UIImage.FromBundle("Images/backgroundImage"));

              var text1 = new UILabel
              {
            TextColor = UIColor.White,
            Text = "Optimizely's iOS SDK enables you to makeyour iOS app more angaging",
            Lines = 0
              };
              text1.Font = UIFont.FromName("Gotham-Light", 16);

              var text2 = new UILabel
              {
            TextColor = UIColor.White,
            Text = "This sample app will take you through implementing and utilizing the core functionality of Optimizely. Feel free to take a look at the code for reference.",
            Lines = 0
              };
              text2.Font = UIFont.FromName("Gotham-Light", 16);

              var text3 = new UILabel
              {
            TextColor = UIColor.White,
            Text = "Please open your browser to developers.optimizely.com/ios to get started.",
            Lines = 0
              };
              text3.Font = UIFont.FromName("Gotham-Light", 16);

              View.AddSubview(text1);
              View.AddSubview(text2);
              View.AddSubview(text3);

              View.SubviewsDoNotTranslateAutoresizingMaskIntoConstraints();
              View.AddConstraints(
            text1.WithSameCenterX(View),
            text1.WithSameLeft(View).Plus(50),
            text1.WithSameRight(View).Minus(50),
            text1.WithSameTop(View).Plus(80),

            text2.WithSameCenterX(View),
            text2.WithSameWidth(text1),
            text2.Below(text1).Plus(20),

            text3.WithSameCenterX(View),
            text3.WithSameWidth(text1),
            text3.Below(text2).Plus(20)
              );
        }

        public override void LoadView ()
        {
            View = new UIImageView () {
                UserInteractionEnabled = true,
            } .Apply (Style.Welcome.Background);
            View.Add (logoImageView = new UIImageView ().Apply (Style.Welcome.Logo));
            View.Add (sloganLabel = new UILabel () {
                Text = "WelcomeSlogan".Tr (),
            } .Apply (Style.Welcome.Slogan));
            View.Add (createButton = new UIButton ().Apply (Style.Welcome.CreateAccount));
            View.Add (passwordButton = new UIButton ().Apply (Style.Welcome.PasswordLogin));
            View.Add (googleButton = new UIButton ().Apply (Style.Welcome.GoogleLogin));

            createButton.SetTitle ("WelcomeCreate".Tr (), UIControlState.Normal);
            passwordButton.SetTitle ("WelcomePassword".Tr (), UIControlState.Normal);
            googleButton.SetTitle ("WelcomeGoogle".Tr (), UIControlState.Normal);

            createButton.TouchUpInside += OnCreateButtonTouchUpInside;
            passwordButton.TouchUpInside += OnPasswordButtonTouchUpInside;
            googleButton.TouchUpInside += OnGoogleButtonTouchUpInside;

            View.AddConstraints (
                logoImageView.AtTopOf (View, 70f),
                logoImageView.WithSameCenterX (View),

                sloganLabel.Below (logoImageView, 18f),
                sloganLabel.AtLeftOf (View, 25f),
                sloganLabel.AtRightOf (View, 25f),

                googleButton.AtBottomOf (View, 20f),
                googleButton.AtLeftOf (View),
                googleButton.AtRightOf (View),
                googleButton.Height ().EqualTo (60f),

                passwordButton.Above (googleButton, 25f),
                passwordButton.AtLeftOf (View),
                passwordButton.AtRightOf (View),
                passwordButton.Height ().EqualTo (60f),

                createButton.Above (passwordButton, 5f),
                createButton.AtLeftOf (View),
                createButton.AtRightOf (View),
                createButton.Height ().EqualTo (60f)
            );

            View.SubviewsDoNotTranslateAutoresizingMaskIntoConstraints ();
        }

        public CodeBlocksViewController()
        {
            // [OPTIMIZELY] Example how to declare a code block
              OnboardingFunnel = OptimizelyCodeBlocksKey.GetOptimizelyCodeBlocksKey("OnboardingFunnel", new NSObject[] { new NSString("Add Onboarding Stage") });
              OptimizelyiOS.Optimizely.PreregisterBlockKey(OnboardingFunnel);

              View.BackgroundColor = Styling.Colors.BackgroundColor;

              var image = new UIImageView
              {
            Image = UIImage.FromBundle("Images/widgetCoLogo_red"),
              };

              var label = new UILabel
              {
            Text = "A company that helps you buy widgets.",
            TextColor = Styling.Colors.TextBlue,
            Font = UIFont.FromName("Gotham-Light", 12),
            TextAlignment = UITextAlignment.Center
              };

              var button = new CustomButton
              {
            TitleText = "Sign In"
              };

              button.TouchUpInside += Button_TouchUpInside;

              View.AddSubviews(image, label, button);

              View.SubviewsDoNotTranslateAutoresizingMaskIntoConstraints();

              View.AddConstraints(
            image.WithSameCenterX(View),
            image.WithSameTop(View).Plus(60),

            label.WithSameCenterX(View),
            label.Below(image).Plus(30),

            button.WithSameCenterX(View),
            button.WithSameBottom(View).Minus(150),
            button.Width().EqualTo(200),
            button.Height().EqualTo(50)
              );
        }

        public CodeBlocksOnboardViewController()
        {
            View.BackgroundColor = Styling.Colors.BackgroundColor;

              var image = new UIImageView
              {
            Image = UIImage.FromBundle("Images/widgetCoLogo_red"),
              };

              var label = new UILabel
              {
            Text = "We sell gears.",
            TextColor = Styling.Colors.TextBlue,
            Font = UIFont.FromName("Gotham-Light", 12),
            TextAlignment = UITextAlignment.Center
              };

              var button = new CustomButton
              {
            TitleText = "Start shopping now!"
              };

              View.AddSubviews(image, label, button);

              View.SubviewsDoNotTranslateAutoresizingMaskIntoConstraints();

              View.AddConstraints(
            image.WithSameCenterX(View),
            image.WithSameTop(View).Plus(60),

            label.WithSameCenterX(View),
            label.Below(image).Plus(30),

            button.WithSameCenterX(View),
            button.WithSameBottom(View).Minus(150),
            button.Width().EqualTo(200),
            button.Height().EqualTo(50)
              );
        }

        public MyCell(IntPtr ptr)
            : base(ptr)
        {
            HeaderlineLabel = new UILabel { Lines = 0, Font = UIFont.PreferredHeadline };
            Add(HeaderlineLabel);

            BodyLabel = new UILabel { Lines = 0, Font = UIFont.PreferredBody };
            Add(BodyLabel);

            this.SubviewsDoNotTranslateAutoresizingMaskIntoConstraints();
            this.AddConstraints
                (
                    HeaderlineLabel.AtTopOf(this, Margin),
                    HeaderlineLabel.WithSameLeft(this).Plus(Margin),
                    HeaderlineLabel.WithSameRight(this).Minus(Margin),

                    BodyLabel.Below(HeaderlineLabel).Plus(Margin/2),
                    BodyLabel.WithSameLeft(HeaderlineLabel),
                    BodyLabel.WithSameRight(HeaderlineLabel),
                    BodyLabel.AtBottomOf(this, Margin)
                );
        }

            private static void ConstructDateTimeView (UIView view, ref UILabel dateLabel, ref UILabel timeLabel)
            {
                view.Add (dateLabel = new UILabel ().Apply (Style.EditTimeEntry.DateLabel));
                view.Add (timeLabel = new UILabel ().Apply (Style.EditTimeEntry.TimeLabel));
                view.AddConstraints (
                    dateLabel.AtTopOf (view, 10f),
                    dateLabel.AtLeftOf (view, 10f),
                    dateLabel.AtRightOf (view, 10f),

                    timeLabel.Below (dateLabel, 2f),
                    timeLabel.AtBottomOf (view, 10f),
                    timeLabel.AtLeftOf (view, 10f),
                    timeLabel.AtRightOf (view, 10f)
                );
                view.SubviewsDoNotTranslateAutoresizingMaskIntoConstraints ();
            }

        public override void ViewDidLoad()
        {
            View.BackgroundColor = UIColor.White;
            base.ViewDidLoad();

            // ios7 layout
            if (RespondsToSelector(new Selector("edgesForExtendedLayout")))
                EdgesForExtendedLayout = UIRectEdge.None;

            var fNameLabel = new UILabel {Text = "First"};
            Add(fNameLabel);

            var sNameLabel = new UILabel {Text = "Last"};
            Add(sNameLabel);

            var numberLabel = new UILabel {Text = "#"};
            Add(numberLabel);

            var streetLabel = new UILabel {Text = "Street"};
            Add(streetLabel);

            var townLabel = new UILabel {Text = "Town"};
            Add(townLabel);

            var zipLabel = new UILabel {Text = "Zip"};
            Add(zipLabel);

            var fNameField = new UITextField() { BackgroundColor = UIColor.LightGray, BorderStyle = UITextBorderStyle.RoundedRect };
            Add(fNameField);

            var sNameField = new UITextField() { BackgroundColor = UIColor.LightGray, BorderStyle = UITextBorderStyle.RoundedRect };
            Add(sNameField);

            var numberField = new UITextField() { BackgroundColor = UIColor.LightGray, BorderStyle = UITextBorderStyle.RoundedRect };
            Add(numberField);

            var streetField = new UITextField() { BackgroundColor = UIColor.LightGray, BorderStyle = UITextBorderStyle.RoundedRect };
            Add(streetField);

            var townField = new UITextField() { BackgroundColor = UIColor.LightGray, BorderStyle = UITextBorderStyle.RoundedRect };
            Add(townField);

            var zipField = new UITextField() { BackgroundColor = UIColor.LightGray, BorderStyle = UITextBorderStyle.RoundedRect };
            Add(zipField);

            var debug = new UILabel() { BackgroundColor = UIColor.White, Lines = 0 };
            Add(debug);

            var set = this.CreateBindingSet<FormView, FormViewModel>();
            set.Bind(fNameField).To(vm => vm.FirstName);
            set.Bind(sNameField).To(vm => vm.LastName);
            set.Bind(numberField).To(vm => vm.Number);
            set.Bind(streetField).To(vm => vm.Street);
            set.Bind(townField).To(vm => vm.Town);
            set.Bind(zipField).To(vm => vm.Zip);
            set.Bind(debug).To("FirstName  + ' ' + LastName + ', '  + Number + ' ' + Street + ' ' + Town + ' ' + Zip");
            set.Apply();

            View.SubviewsDoNotTranslateAutoresizingMaskIntoConstraints();

            var hMargin = 10;
            var vMargin = 10;


            View.AddConstraints(

                fNameLabel.AtTopOf(View, vMargin),
                fNameLabel.AtLeftOf(View, hMargin),
                fNameLabel.ToLeftOf(sNameLabel, hMargin),

                sNameLabel.WithSameTop(fNameLabel),
                sNameLabel.AtRightOf(View, hMargin),
                sNameLabel.WithSameWidth(fNameLabel),

                fNameField.WithSameWidth(fNameLabel),
                fNameField.WithSameLeft(fNameLabel),
                fNameField.Below(fNameLabel, vMargin),

                sNameField.WithSameLeft(sNameLabel),
                sNameField.WithSameWidth(sNameLabel),
                sNameField.WithSameTop(fNameField),

                numberLabel.WithSameLeft(fNameLabel),
                numberLabel.ToLeftOf(streetLabel, hMargin),
                numberLabel.Below(fNameField, vMargin),
                numberLabel.WithRelativeWidth(streetLabel, 0.3f),

                streetLabel.WithSameTop(numberLabel),
                streetLabel.AtRightOf(View, hMargin),

                numberField.WithSameLeft(numberLabel),
                numberField.WithSameWidth(numberLabel),
                numberField.Below(numberLabel, vMargin),

                streetField.WithSameLeft(streetLabel),
                streetField.WithSameWidth(streetLabel),
                streetField.WithSameTop(numberField),

                townLabel.WithSameLeft(fNameLabel),
                townLabel.WithSameRight(streetLabel),
//.........这里部分代码省略.........

//.........这里部分代码省略.........
            View.Add(title);

#if USEAUTOLAYOUT
            var back = new UIView {BackgroundColor = UIColor.DarkGray.ColorWithAlpha(.6f)};
            var back2 = new UIView { BackgroundColor = UIColor.Clear };
            var inputUrl = new UITextField
            {
                TextColor = UIColor.White, Font = UIFont.SystemFontOfSize(14f),

                AttributedPlaceholder = new NSMutableAttributedString("Enter url of svg file, or tap anywhere for demo",
                    foregroundColor: UIColor.Gray, font: UIFont.ItalicSystemFontOfSize(12)),
                KeyboardType = UIKeyboardType.Url, AutocorrectionType = UITextAutocorrectionType.No,
                AutocapitalizationType = UITextAutocapitalizationType.None,
                //ReturnKeyType = UIReturnKeyType.Go,
                //EnablesReturnKeyAutomatically = true, ShouldReturn = 
            };
            //var inputOk = new UISvgImageView("res:images.download", 25, colorMapping: "000000=FF546D", colorMappingSelected: "000000=00FF59")
            //{
            //    UserInteractionEnabled = true,
            //};
            var inputOk = new UISvgImageView
            {
                UserInteractionEnabled = true,
                TranslatesAutoresizingMaskIntoConstraints = false,
                FillWidth = 25,
                ColorMapping="000000=FF546D",
                ColorMappingSelected="000000=00FF59",
                BundleName = "res:images.download"
            };
            //var inputOk = new UISvgImageView("", 25); //for debug
            View.Add(back);
            View.Add(back2);
            View.SendSubviewToBack(back);
            View.SendSubviewToBack(image); //image behind back
            View.Add(inputUrl);
            View.Add(inputOk);

            inputOk.AddGestureRecognizer(new UITapGestureRecognizer(tap =>
            {
                inputUrl.ResignFirstResponder();
                var dontWait = LoadSvg(inputUrl.Text);
            }));

            inputUrl.EditingDidBegin += (sender, args) =>
            {
                inputUrl.SelectAll(this);
            };

            inputUrl.SetContentHuggingPriority((float)UILayoutPriority.FittingSizeLevel, UILayoutConstraintAxis.Horizontal);
            inputOk.SetContentCompressionResistancePriority((float)UILayoutPriority.Required, UILayoutConstraintAxis.Horizontal);
            View.SubviewsDoNotTranslateAutoresizingMaskIntoConstraints();
            View.AddConstraints(
                back.WithSameTop(inputOk).Minus(5),
                back.AtLeftOf(View),
                back.AtRightOf(View),
                back.WithSameBottom(title).Plus(5),

                back2.Below(back),
                back2.AtLeftOf(View),
                back2.AtRightOf(View),
                back2.AtBottomOf(View),

                inputUrl.AtLeftOf(View, 5),
                inputUrl.WithSameCenterY(inputOk),

                inputOk.AtTopOf(View,30),
                inputOk.AtRightOf(View, 5),
                inputOk.ToRightOf(inputUrl,5),

                title.Below(inputUrl, 20),
                title.AtLeftOf(View, 5),
                title.AtRightOf(View,5),
                //No height for title, use its intrinsic height

                image.AtBottomOf(View),
                image.AtLeftOf(View),
                //Test: Width forced, free height
                image.WithSameWidth(View),
                //Test: Width forced, Height forced to view height
                image.Height().LessThanOrEqualTo().HeightOf(View)
                //Test: Width forced, Height forced (50)
                );
#endif
            image.FillMode = SvgFillMode.Fit;

            //var t = new UIImageView(new CGRect(0, 0, 100, 100));
            //t.Image = LoadLastSvgFromString();
            //View.Add(t);

            //image.UserInteractionEnabled = true;
            back2.AddGestureRecognizer(new UITapGestureRecognizer(() =>
            {
                index = ++index%svgNames.Count;
                image.BundleName = svgNames[index];
                title.Text = $"Displaying {svgNames[index]}";
                title.TextColor = UIColor.White;

            }) { NumberOfTapsRequired = 1 });

        }

        public WelcomeController()
        {
            View.BackgroundColor = Styling.Colors.WelcomeBackgroundColor;

              var welcomeView = new UIView
              {
            BackgroundColor = UIColor.White,
            ClipsToBounds = true,
              };
              welcomeView.Layer.CornerRadius = 8;

              var image = new UIImageView
              {
            Image = UIImage.FromBundle("Images/blueLogoWelcomeScreen"),
            ContentMode = UIViewContentMode.ScaleAspectFit
              };

              var welcomeLabel = new UILabel
              {
            Text = "Welcome to the\nOptimizely Tutorial App",
            Lines = 2,
            TextAlignment = UITextAlignment.Center,
              };
              welcomeLabel.Font = UIFont.FromName("Gotham-Light", 18);

              var textLabel = new UILabel
              {
            Text = "Please open your browser to\ndevelopers.optimizely.com/ios",
            Lines = 2,
            TextAlignment = UITextAlignment.Center,
              };
              textLabel.Font = UIFont.FromName("Gotham-Light", 14);

              var button = new CustomButton
              {
            BackgroundColor = Styling.Colors.ButtonGreen,
            TitleText = "Got it. Let's go!"
              };
              // [OPTIMIZELY] Below is an example of if you want to tag
              // ids manually
              // OptimizelyiOS.UIView_Optimizely.GetOptimizelyId(button);

              button.TouchUpInside += Button_TouchUpInside;

              welcomeView.AddSubview(image);
              welcomeView.AddSubview(welcomeLabel);
              welcomeView.AddSubview(textLabel);
              welcomeView.AddSubview(button);

              welcomeView.SubviewsDoNotTranslateAutoresizingMaskIntoConstraints();
              welcomeView.AddConstraints(
            image.WithSameCenterX(welcomeView),
            image.WithSameTop(welcomeView).Plus(40),
            image.WithSameLeft(welcomeView).Plus(30),
            image.WithSameRight(welcomeView).Minus(30),

            welcomeView.WithSameCenterX(welcomeView),
            welcomeLabel.Below(image).Plus(50),
            welcomeLabel.WithSameLeft(welcomeView).Plus(15),
            welcomeLabel.WithSameRight(welcomeView).Minus(15),

            textLabel.WithSameCenterX(welcomeView),
            textLabel.Below(welcomeLabel).Plus(50),
            textLabel.WithSameWidth(welcomeLabel),

            button.WithSameCenterX(welcomeView),
            button.Below(textLabel).Plus(50),
            button.Width().EqualTo(200),
            button.Height().EqualTo(50)
              );

              View.AddSubview(welcomeView);
              View.SubviewsDoNotTranslateAutoresizingMaskIntoConstraints();

              View.AddConstraints(
            welcomeView.WithSameCenterX(View),
            welcomeView.WithSameCenterY(View).Minus(10),
            welcomeView.WithSameLeft(View).Plus(30),
            welcomeView.WithSameRight(View).Minus(30),
            welcomeView.Width().EqualTo(View.Bounds.Width - 60),
            welcomeView.Height().EqualTo(380)
              );
        }

        public VisualEditorViewController()
        {
            View.BackgroundColor = Styling.Colors.BackgroundColor;

              View.AddGestureRecognizer(new UITapGestureRecognizer(ViewTap));

              var discountLabel = new UILabel
              {
            BackgroundColor = Styling.Colors.Green,
            Text = "25% OFF YOUR FIRST ORDER IF YOU SIGN UP BY 9/1",
            Font = UIFont.FromName("Gotham-Medium", 11),
            TextColor = UIColor.White,
            TextAlignment = UITextAlignment.Center
              };

              var image = new UIImageView
              {
            Image = UIImage.FromBundle("Images/widgetCoLogo_red"),
              };

              var emailLabel = new UILabel
              {
            Text = "Email",
            Font = UIFont.FromName("Gotham-Light", 10)
              };
              var emailField = new CustomTextField
              {
            Placeholder = "[email protected]"
              };

              var phoneLabel = new UILabel
              {
            Text = "Phone Number:",
            Font = UIFont.FromName("Gotham-Light", 10)
              };

              var phoneField = new CustomTextField
              {
            Placeholder = "(555)-555-5555"
              };

              var passwordLabel = new UILabel
              {
            Text = "Password",
            Font = UIFont.FromName("Gotham-Light", 10)
              };

              var passwordField = new CustomTextField
              {
            SecureTextEntry = true,
              };

              var button = new CustomButton
              {
            TitleText = "Take me to the widgets"
              };

              View.AddSubviews(emailLabel, emailField, phoneLabel, phoneField, passwordLabel, passwordField, button, discountLabel, image);

              View.SubviewsDoNotTranslateAutoresizingMaskIntoConstraints();

              View.AddConstraints(
            discountLabel.WithSameTop(View),
            discountLabel.WithSameLeft(View),
            discountLabel.WithSameRight(View),
            discountLabel.Height().EqualTo(30),

            phoneLabel.WithSameLeft(phoneField),
            phoneLabel.WithSameCenterY(View),

            phoneField.WithSameCenterX(View),
            phoneField.Height().EqualTo(30),
            phoneField.Width().EqualTo(200),
            phoneField.Below(phoneLabel).Plus(5),

            emailField.WithSameLeft(phoneField),
            emailField.WithSameWidth(phoneField),
            emailField.WithSameHeight(phoneField),
            emailField.Above(phoneLabel).Minus(15),

            emailLabel.WithSameLeft(phoneField),
            emailLabel.Above(emailField).Minus(5),

            image.WithSameCenterX(View),
            image.Above(emailLabel).Minus(15),

            passwordLabel.WithSameLeft(phoneField),
            passwordLabel.Below(phoneField).Plus(15),

            passwordField.WithSameLeft(phoneField),
            passwordField.WithSameWidth(phoneField),
            passwordField.WithSameHeight(phoneField),
            passwordField.Below(passwordLabel).Plus(5),

            button.Below(passwordField).Plus(20),
            button.WithSameCenterX(View),
            button.WithSameWidth(phoneField),
            button.Height().EqualTo(50)
              );
        }

            public LandingTableModelCell(string reuseIdentifier)
                : base(UITableViewCellStyle.Default, reuseIdentifier)
            {
                image = new UIImageView();
                title = new UILabel();
                description = new UILabel();

                title.TextColor = UIColor.White;
                title.Font = UIFont.FromName("Gotham-Medium", 20);
                description.TextColor = UIColor.White;
                description.Font = UIFont.FromName("Gotham-Light", 12);
                image.ContentMode = UIViewContentMode.ScaleAspectFit;

                BackgroundColor = UIColor.Clear;

                AddSubviews(image, title, description);

                this.SubviewsDoNotTranslateAutoresizingMaskIntoConstraints();

                this.AddConstraints(
                  image.WithSameCenterY(this),
                  image.WithSameLeft(this).Plus(20),
                  image.Width().EqualTo(80),
                  image.Height().EqualTo(80),

                  title.WithSameTop(image),
                  title.ToRightOf(image).Plus(20),

                  description.WithSameLeft(title),
                  description.Below(title).Plus(20)
                );
            }