属性触发器

1
2<ContentPage.Resources>
3    <Style TargetType="Editor">
4        <Style.Triggers>
5            <Trigger TargetType="Editor"
6                Property="IsFocused"
7                Value="True">
8                <Setter Property="TextColor"
9                    Value="Red" />
10            </Trigger>
11        </Style.Triggers>
12    </Style>
13</ContentPage.Resources>

1
2<Editor Placeholder="输入数据"
3    HorizontalOptions="Center" />