Question

如何在Xamarin.Forms中为Editor制作边框颜色？

我使用了此link，但它仅适用于Android。我希望它能在所有平台上运行！

我对此有点新手。请帮帮我。

有什么想法吗？

Answer 1

您也可以通过使用StackLayout BackgroundColor="your color"和Padding="1"包装编辑器并将编辑器的BackgroundColor设置为与表单相同的颜色来实现此目的。

这样的事情：

<StackLayout BackgroundColor="White">
      <StackLayout BackgroundColor="Black" Padding="1">
          <Editor BackgroundColor="White" />
      </StackLayout>
  ...
</StackLayout>

不是那么花哨，但这至少会让你成为一个边界！

Answer 2

这是我使用的完整解决方案。你需要三件事。

1 - 在表单项目中实现Editor的自定义类。

public class BorderedEditor : Editor
{

}

2 - iOS项目中自定义Editor的自定义渲染器。

public class BorderedEditorRenderer : EditorRenderer
{
    protected override void OnElementChanged(ElementChangedEventArgs<Editor> e)
    {
        base.OnElementChanged(e);

        if (Control != null)
        {
            Control.Layer.CornerRadius = 3;
            Control.Layer.BorderColor = Color.FromHex("F0F0F0").ToCGColor();
            Control.Layer.BorderWidth = 2;
        }
    }
}

3 - iOS项目中的ExportRenderer属性告诉Xamarin将自定义渲染器用于自定义编辑器。

[assembly: ExportRenderer(typeof(BorderedEditor), typeof(BorderedEditorRenderer))]

然后在Xaml中使用自定义编辑器：

<custom:BorderedEditor Text="{Binding TextValue}"/>

Answer 3

便携式项目中的

添加此控件

 public class PlaceholderEditor : Editor
{
    public static readonly BindableProperty PlaceholderProperty =
        BindableProperty.Create("Placeholder", typeof(string), typeof(string), "");

    public PlaceholderEditor()
    {
    }

    public string Placeholder
    {
        get
        {
            return (string)GetValue(PlaceholderProperty);
        }

        set
        {
            SetValue(PlaceholderProperty, value);
        }
    }       
}

你的android项目中的

添加这个渲染器：

[assembly: ExportRenderer(typeof(PlaceholderEditor), typeof(PlaceholderEditorRenderer))]
namespace Tevel.Mobile.Packages.Droid
{


public class PlaceholderEditorRenderer : EditorRenderer
{ 

public PlaceholderEditorRenderer() {  }

    protected override void OnElementChanged(ElementChangedEventArgs<Editor> e)
    {
        base.OnElementChanged(e);

        if (e.NewElement != null)
        {
            var element = e.NewElement as PlaceholderEditor;

            this.Control.Background = Resources.GetDrawable(Resource.Drawable.borderEditText);

            this.Control.Hint = element.Placeholder;
        }
    }

    protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
    {
        base.OnElementPropertyChanged(sender, e);

        if (e.PropertyName == PlaceholderEditor.PlaceholderProperty.PropertyName)
        {
            var element = this.Element as PlaceholderEditor;
            this.Control.Hint = element.Placeholder;
        }
    }
}
}

资源中的

＆gt; drawable添加XML文件borderEditText.xml

 <?xml version="1.0" encoding="UTF-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
  <item android:state_focused="true">
<shape android:shape="rectangle">
  <gradient
      android:startColor="#FFFFFF"
      android:endColor="#FFFFFF"
      android:angle="270" />
  <stroke
      android:width="3dp"
      android:color="#F8B334" />
  <corners android:radius="12dp" />
</shape>
  </item>
  <item>
<shape android:shape="rectangle">
  <gradient android:startColor="#FFFFFF" android:endColor="#FFFFFF"  android:angle="270" />
  <stroke android:width="3dp" android:color="#ccc" />
  <corners android:radius="12dp" />
</shape>
  </item>
</selector>

<强>的Xaml：标题 - xmlns:ctrls="clr-namespace:my control namespace;assembly= my assembly" 控制：

<ctrls:PlaceholderEditor VerticalOptions="Fill" HorizontalOptions="StartAndExpand" Placeholder="add my comment title">
        </ctrls:PlaceholderEditor>

Answer 4

最简单的方法是在其周围添加框架。

 <Frame BorderColor="LightGray" HasShadow="False" Padding="0">
     <Editor/>
 </Frame>

Answer 5

由于Custom Renderer尚不支持自定义BorderColor的{{1}}，因此您需要为每个平台实施Entry（guide from Xamarin）。

由于您已经设法更改了Android上的Xamarin.Forms，因此您可以在此处找到适用于iOS的解决方案：http://forums.xamarin.com/discussion/comment/102557/#Comment_102557

Answer 6

这肯定有用，试试这个。

Android渲染器

using Xamarin.Forms;
using Xamarin.Forms.Platform.Android;
using Android.Graphics;

    [assembly: ExportRenderer(typeof(Entry), typeof(some.namespace.EntryRenderer))]
    namespace some.namespace
    {
        public class EntryRenderer : Xamarin.Forms.Platform.Android.EntryRenderer
        {
            protected override void OnElementChanged(ElementChangedEventArgs<Entry> e)
            {
                base.OnElementChanged(e);
                if (Control == null || Element == null || e.OldElement != null) return;

                var customColor = Xamarin.Forms.Color.FromHex("#0F9D58");
                Control.Background.SetColorFilter(customColor.ToAndroid(), PorterDuff.Mode.SrcAtop);
            }
        }
    }

Answer 7

简单的Android渲染器方法

if (((Editor)Element).HasBorder)
                {
                    GradientDrawable gd = new GradientDrawable();
                    gd.SetColor(Android.Resource.Color.HoloRedDark);
                    gd.SetCornerRadius(4);
                    gd.SetStroke(2, Android.Graphics.Color.LightGray);
                    Control.SetBackground(gd);
                }

Answer 8

将自定义控件构建为网格。在它周围构建BoxView并将编辑器放在中间并带有边距。不好但很简单...

    <Grid xmlns="http://xamarin.com/schemas/2014/forms" 
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:CustomControls="clr-namespace:xxx.CustomControls"
             x:Class="xxx.CustomControls.EditorWithBorder" BackgroundColor="White"
                x:Name="this">
    <Grid.RowDefinitions>
        <RowDefinitionCollection>
            <RowDefinition Height="1"/>
            <RowDefinition Height="1*"/>
            <RowDefinition Height="1"/>
        </RowDefinitionCollection>
    </Grid.RowDefinitions>
    <Grid.ColumnDefinitions>
        <ColumnDefinitionCollection>
            <ColumnDefinition Width="1"/>
            <ColumnDefinition Width="1*"/>
            <ColumnDefinition Width="1"/>
        </ColumnDefinitionCollection>
    </Grid.ColumnDefinitions>

    <Editor Text="{Binding Source={x:Reference this},Path=EditorText, Mode=TwoWay}" TextColor="Orange" Margin="20,10,20,10" FontSize="{StaticResource FontSizeLarge}"
                                Grid.Row="1" Grid.Column="1" />


    <BoxView Grid.Row="0" Grid.Column="0" Grid.ColumnSpan="3" BackgroundColor="Orange"
             ></BoxView>

    <BoxView Grid.Row="0" Grid.Column="0" Grid.RowSpan="3" BackgroundColor="Orange"

             ></BoxView>

    <BoxView Grid.Row="0" Grid.Column="2" Grid.RowSpan="3" BackgroundColor="Orange" HeightRequest="1"

             ></BoxView>
    <BoxView Grid.Row="2" Grid.Column="0" Grid.ColumnSpan="3" BackgroundColor="Orange" HeightRequest="1"

             ></BoxView>
</Grid>

Xamarin.Forms中编辑器的边框颜色

8 个答案: