更新日期:
所以我不确定这是否是一个bug,但我已经在Github中提出了一个bug,可以在这里跟踪:https://github.com/dotnet/maui/issues/9720
问题:
所以我最近一直在广泛地尝试MAUI,并试图创建一个自定义控件,我猜,我遇到了这个奇怪的问题,CreatePlatform方法从未被调用,起初我认为这是因为我使用的是MAUI类库,它们有一些问题,因此,我在同一个MAUI项目中创建了另一个控件,而不是通过CL来创建,令我惊讶的是,即使这样它也不起作用。
我的代码如下:
接口:
public interface IExtendedLabel : ILabel
{
bool HasUnderline { get; }
Color UnderlineColor { get; }
}
标注分类:
public class ExtendedLabel : Label, IExtendedLabel
{
public readonly BindableProperty HasUnderlineProperty = BindableProperty.Create(
nameof(HasUnderline),
typeof(bool),
typeof(ExtendedLabel),
true);
public bool HasUnderline
{
get => (bool)GetValue(HasUnderlineProperty);
set => SetValue(HasUnderlineProperty, value);
}
public readonly BindableProperty UnderlineColorProperty = BindableProperty.Create(
nameof(UnderlineColor),
typeof(Color),
typeof(ExtendedLabel),
Colors.Black);
public Color UnderlineColor
{
get => (Color)GetValue(HasUnderlineProperty);
set => SetValue(HasUnderlineProperty, value);
}
}
我的共享处理程序:
using System;
using MAUI.FreakyControls;
using Microsoft.Maui.Handlers;
#if ANDROID
using NativeView = AndroidX.AppCompat.Widget.AppCompatTextView;
#endif
#if IOS
using NativeView = UIKit.UILabel;
#endif
namespace Samples
{
public partial class ExtendedLabelHandler : ViewHandler<IExtendedLabel,NativeView>
{
#region ctor
public static CommandMapper<IExtendedLabel, ExtendedLabelHandler> CommandMapper = new(ViewCommandMapper);
public ExtendedLabelHandler() : base(FreakyEditorMapper)
{
}
public ExtendedLabelHandler(IPropertyMapper mapper = null) : base(mapper ?? FreakyEditorMapper)
{
}
#endregion
#region Mappers
public static IPropertyMapper<IExtendedLabel, ExtendedLabelHandler> FreakyEditorMapper = new PropertyMapper<IExtendedLabel, ExtendedLabelHandler>(ViewMapper)
{
[nameof(IExtendedLabel.HasUnderline)] = MapHasUnderlineWithColor,
[nameof(IExtendedLabel.UnderlineColor)] = MapHasUnderlineWithColor
};
public static void MapHasUnderlineWithColor(ExtendedLabelHandler handler, IExtendedLabel entry)
{
}
#endregion
}
}
Android处理程序:
public partial class ExtendedLabelHandler
{
protected override AppCompatTextView CreatePlatformView()
{
var nativeView = new AppCompatTextView(this.Context)
{
};
return nativeView;
}
private void HandleNativeHasUnderline(bool hasUnderline, Color underlineColor)
{
if (hasUnderline)
{
var AndroidColor = underlineColor.ToNativeColor();
var colorFilter = BlendModeColorFilterCompat.CreateBlendModeColorFilterCompat(
AndroidColor, BlendModeCompat.SrcIn);
PlatformView.Background?.SetColorFilter(colorFilter);
}
else
{
PlatformView.Background?.ClearColorFilter();
}
}
}
我的iOS处理程序:
public partial class ExtendedLabelHandler
{
CoreAnimation.CALayer bottomLine;
protected override UILabel CreatePlatformView()
{
return new UILabel();
}
private void HandleNativeHasUnderline(bool hasUnderline, Color underlineColor)
{
if (hasUnderline)
{
var uiColor = underlineColor.ToNativeColor();
bottomLine = BottomLineDrawer(uiColor);
bottomLine.Frame = new CGRect(x: 0, y: PlatformView.Frame.Size.Height - 5,
width: PlatformView.Frame.Size.Width, height: 1);
PlatformView.Layer.AddSublayer(bottomLine);
PlatformView.Layer.MasksToBounds = true;
}
else
{
bottomLine?.RemoveFromSuperLayer();
}
}
}
添加处理程序:
handlers.AddHandler(typeof(IExtendedLabel), typeof(ExtendedLabelHandler));
我做错什么了吗?
你可以在我的repo上找到完整的代码,这里有一个完整的工作示例,说明由于某种原因,该方法从未被调用过:https://github.com/FreakyAli/MAUI.FreakyControls/tree/r1-gh/feat/freakyeditor
1条答案
按热度按时间vh0rcniy1#
所以问题是我的注册,我注册的是我的接口,而不是我的自定义控件的类:
祝所有找这个的人好运。