Question

我将它设置为下面的代码，但它没有用。

ProductList.Margin = 10 //Exception

Answer 1

如果ProductList是View，您可以更改其填充和边距：

ProductList.Css.Padding = 10;
ProductList.Css.Margin = 20;

Answer 2

或者，您可以使用提供流畅API的扩展方法（因为它们返回对象），如下所示：

Helpers <UpdateOverlayMessage> :Transmitting request to the server...(called from Apply) -2037862263
Helpers <UpdateOverlayMessage> :Processing recieved response...(called from Apply) -2037862263
Helpers <UpdateOverlayMessage> :Processing response...(called from Apply) -2037862263
Helpers <UpdateOverlayMessage> :Updating sign list in progress, may be take a while...(called from Apply) -2037862263
Helpers <UpdateProgressValue> (called from Apply)-2037862263
Helpers <UpdateProgressValue> (called from Apply)-2037862263
Helpers <UpdateProgressValue> (called from Apply)-2037862263
Helpers <UpdateProgressValue> (called from Apply)-2037862263
Helpers <UpdateProgressValue> (called from Apply)-2037862263
Helpers <UpdateProgressValue> (called from Apply)-2037862263
Helpers <UpdateProgressValue> (called from Apply)-2037862263
Helpers <UpdateProgressValue> (called from Apply)-2037862263
Helpers <UpdateProgressValue> (called from Apply)-2037862263
Helpers <UpdateProgressValue> (called from Apply)-2037862263
Helpers <UpdateProgressValue> (called from Apply)-2037862263
Helpers <UpdateProgressValue> (called from Apply)-2037862263
Helpers <UpdateProgressValue> (called from Apply)-2037862263
Helpers <UpdateProgressValue> (called from Apply)-2037862263

这些扩展方法也允许您设置特定的边。例如：

public class LoadingOverlay : UIView {
        // control declarations
        UIActivityIndicatorView activitySpinner;
        UILabel loadingLabel;
        UIProgressView progressView;

        public LoadingOverlay (CGRect frame) : base (frame)
        {
            // configurable bits

            BackgroundColor = UIColor.Black;
            Alpha = 0.55f;
            AutoresizingMask = UIViewAutoresizing.All;

            nfloat labelHeight = 22;
            nfloat labelWidth = Frame.Width - 20;

            // derive the center x and y
            nfloat centerX = Frame.Width / 2;
            nfloat centerY = Frame.Height / 2;

            // create the activity spinner, center it horizontall and put it 5 points above center x
            activitySpinner = new UIActivityIndicatorView(UIActivityIndicatorViewStyle.WhiteLarge);
            activitySpinner.Frame = new CGRect ( 
                centerX - (activitySpinner.Frame.Width / 2) ,
                centerY - activitySpinner.Frame.Height - 20 ,
                activitySpinner.Frame.Width,
                activitySpinner.Frame.Height);
            activitySpinner.AutoresizingMask = UIViewAutoresizing.All;
            AddSubview (activitySpinner);
            activitySpinner.StartAnimating ();

            // create and configure the "Loading Data" label
            loadingLabel = new UILabel(new CGRect (
                centerX - (labelWidth / 2),
                centerY + 20 ,
                labelWidth ,
                labelHeight
            ));
            loadingLabel.BackgroundColor = UIColor.Clear;
            loadingLabel.TextColor = UIColor.White;
            loadingLabel.Text = "Wait a moment...";
            loadingLabel.TextAlignment = UITextAlignment.Center;
            loadingLabel.AutoresizingMask = UIViewAutoresizing.All;
            AddSubview (loadingLabel);

            progressView = new UIProgressView();
            progressView.Progress = 0.0f;
            var screenParts = Frame.Width / 3;
            progressView.Frame = new CGRect(new CGPoint(screenParts,loadingLabel.Frame.Y + loadingLabel.Frame.Height + 20), new CGSize(screenParts,40));
            progressView.Hidden = true;

            AddSubview(progressView);
        }

        /// <summary>
        /// Fades out the control and then removes it from the super view
        /// </summary>
        public void Hide ()
        {
            progressView.Progress = 0.0f;
            InvokeOnMainThread(() => {
                UIView.Animate(
                    0.5, // duration
                    () => { Alpha = 0; },
                    () => { RemoveFromSuperview(); }
                );
            });
        }

        public void SetLoadingLabel(String text)
        {
            InvokeOnMainThread(() => {
                loadingLabel.Text = text;
            });
        }

        public void UpdateProgress(float progressValue){
            if(progressView.Hidden){
                progressView.Hidden = false;
            }
            if(progressValue > 1){
                progressValue = 1;
            }
            InvokeOnMainThread(() => {
                progressView.SetProgress(progressValue, true);
            });
        }
    }

如何在Zebble for Xamarin的代码中设置元素的填充或边距？

2 个答案: