动态添加要在XAML中使用的属性

<Label Text="{Binding Name}" />

<ContentPage.Resources>
    <ResourceDictionary>
        <Style TargetType="Label">
            <Setter Property="TextColor" Value="Red" />
        </Style>
    </ResourceDictionary>
</ContentPage.Resources>

<Label>
    <Label.Style>
        <Style TargetType="Label">
            <Setter Property="TextColor" Value="Red" />
            <Style.Triggers>
                <Trigger TargetType="Label" Property="IsEnabled" Value="False">
                    <Setter Property="TextColor" Value="Gray" />
                </Trigger>
            </Style.Triggers>
        </Style>
    </Label.Style>
</Label>

<Label>
    <Label.Behaviors>
        <local:ChangeColorBehavior Color="Blue" />
    </Label.Behaviors>
    <Label.GestureRecognizers>
        <TapGestureRecognizer Command="{Binding ChangeColorCommand}" />
    </Label.GestureRecognizers>
</Label>