How to use ContentView view as the parent class of custom view in Xamarin XAML language
This article mainly introduces how to use ContentView view as the parent class of custom view in Xamarin XAML language. It is very detailed and has certain reference value. Friends who are interested must finish it!
Parent class of custom view: ContentView view can be used as the parent class of custom view.
[example 14-2] A color view will be customized below. The specific steps are as follows:
(1) create a Forms Xaml View file named ColorView.
(2) Open the ColorView.xaml file, write code, and build a custom color view. The code is as follows:
(3) Open the ColorView.xaml.cs file, write the code, and realize some properties related to the color view. The code is as follows:
Using System
Using System.Collections.Generic
Using System.Linq
Using System.Text
Using System.Threading.Tasks
Using Xamarin.Forms
Namespace ContentViewCustomControls
{
Public partial class ColorView: ContentView
{
String colorName
ColorTypeConverter colorTypeConv = new ColorTypeConverter ()
Public ColorView ()
{
InitializeComponent ()
}
/ / Color name
Public string ColorName
{
Set
{
ColorName = value
ColorNameLabel.Text = value
Color color = (Color) colorTypeConv.ConvertFromInvariantString (colorName)
BoxView.Color = color
ColorValueLabel.Text = String.Format ("{0:X2}-{1:X2}-{2:X2}"
(int) (255 * color.R)
(int) (255 * color.G)
(int) (255 * color.B))
}
Get
{
Return colorName
}
}
}
}
(4) Open the MainPage.xaml file, write code, and realize the layout of the content page through the color view. The code is as follows:
When you run the program at this point, you will see the effect shown in figure 14.10-14.11.
(5) build more complex layout patterns: you can include views and layouts in ContentView to build more complex layout patterns.
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