单击按钮时的 colors 列表

Question

I am new to the Xamarin forms and I have designed a button my TL asked me, that when we click a button I want to list colors that are to display a color list.I don't know what to do please help someone.

Answer 1

I don't know what your specific needs are, but you can refer to document Listing Colors with BoxView which uses BoxView to achieve this.

The BoxView is convenient for displaying colors. This program uses a ListView to list all the public static read-only fields of the Xamarin.Forms Color structure:

You can refer to the following code:

public class NamedColor
{
    // Instance members.
    private NamedColor()
    {
    }

    public string Name { private set; get; }

    public string FriendlyName { private set; get; }

    public Color Color { private set; get; }

    public string RgbDisplay { private set; get; }

    // Static members.
    static NamedColor()
    {
        List<NamedColor> all = new List<NamedColor>();
        StringBuilder stringBuilder = new StringBuilder();

        // Loop through the public static fields of the Color structure.
        foreach (FieldInfo fieldInfo in typeof(Color).GetRuntimeFields ())
        {
            if (fieldInfo.IsPublic &&
                fieldInfo.IsStatic &&
                fieldInfo.FieldType == typeof (Color))
            {
                // Convert the name to a friendly name.
                string name = fieldInfo.Name;
                stringBuilder.Clear();
                int index = 0;

                foreach (char ch in name)
                {
                    if (index != 0 && Char.IsUpper(ch))
                    {
                        stringBuilder.Append(' ');
                    }
                    stringBuilder.Append(ch);
                    index++;
                }

                // Instantiate a NamedColor object.
                Color color = (Color)fieldInfo.GetValue(null);

                NamedColor namedColor = new NamedColor
                {
                    Name = name,
                    FriendlyName = stringBuilder.ToString(),
                    Color = color,
                    RgbDisplay = String.Format("{0:X2}-{1:X2}-{2:X2}",
                                               (int)(255 * color.R),
                                               (int)(255 * color.G),
                                               (int)(255 * color.B))
                };

                // Add it to the collection.
                all.Add(namedColor);
            }
        }
        all.TrimExcess();
        All = all;
    }

    public static IList<NamedColor> All { private set; get; }
}

For more information, you can check the full sample here: ListViewColors :