Xamarin Forms 빌드 오류 - 키에 StaticResource가 없습니다.

Question

XAML 및 Xamrin을 배우고 있습니다. 정적 스타일이 작동하는 방법을 배우려고합니다. 이미 나는 스타일 '키'때문에이 오류가 왜

[ERROR] FATAL UNHANDLED EXCEPTION: Xamarin.Forms.Xaml.XamlParseException: Position 25:58. StaticResource not found for key baseStyle 

이해가 안된다

<?xml version="1.0" encoding="utf-8" ?> 
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms" 
      xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml" 
      xmlns:local="clr-namespace:Styles" 
      x:Class="Styles.MainPage"> 

    <ContentPage.Resources> 
     <ResourceDictionary> 
      <Style x:key="buttonStyle" TargetType="Button"> 
       <Setter Property="HorizontalOptions" Value="Center"/> 
       <Setter Property="VerticalOptions" Value="Center" /> 
       <Setter Property="TextColor" Value="Red"/> 
       <Setter Property="FontSize" Value="Small"/> 
      </Style> 
      <Style TargetType="Label"> 
       <Setter Property="HorizontalOptions" Value="Center"/> 
       <Setter Property="VerticalOptions" Value="Center" /> 
       <Setter Property="TextColor" Value="Blue"/> 
       <Setter Property="FontSize" Value="20"/> 
      </Style> 
      <Style x:key="baseStyle" TargetType="View"> 
       <Setter Property="HorizontalOptions" Value="Center"/> 
       <Setter Property="VerticalOptions" Value="Center" /> 
      </Style> 
      <Style x:key="entryStyle" TargetType="Entry" BasedOn="{StaticResource baseStyle}"> 
       <Setter Property="TextColor" Value="Green"/> 
      </Style> 
     </ResourceDictionary> 
    </ContentPage.Resources> 

    <ContentPage.Content> 
     <StackLayout Padding="20"> 
      <Label Text="This is label 1 using implicit style"/> 
      <Label Text="This is label 2"/> 
      <Button 
       Text="Not using the button style" 
        BorderWidth="2" 
       HorizontalOptions="Center" 
       VerticalOptions="Center" 
        WidthRequest="200"/> 
      <Button Style="{StaticResource buttonStyle}" 
        Text="Using explicit style" 
        BorderWidth="2" 
        WidthRequest="200"/> 
      <Entry Style="{StaticResource entryStyle}" Placeholder="This enty uses an inherited style"/> 

      <Button Style="{StaticResource buttonStyle}" 
        Text="Using explicit style" 
        BorderWidth="2" 
        WidthRequest="200"/> 
     </StackLayout> 
    </ContentPage.Content> 
</ContentPage> 

컴파일이 잘 작동하지만 실행할 때, 나는이 예외가 : 여기 내 XAML 코드입니다 이전 행에 정의되어 있습니다. 어떤 도움이라도 대단히 감사합니다.

Answer 1

x:Key 속성의 첫 문자는 대문자 여야합니다.

<?xml version="1.0" encoding="utf-8" ?> 
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms" 
      xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml" 
      xmlns:local="clr-namespace:Styles" 
      x:Class="Styles.MainPage"> 

    <ContentPage.Resources> 
     <ResourceDictionary> 
      <Style x:Key="buttonStyle" TargetType="Button"> 
       <Setter Property="HorizontalOptions" Value="Center"/> 
       <Setter Property="VerticalOptions" Value="Center" /> 
       <Setter Property="TextColor" Value="Red"/> 
       <Setter Property="FontSize" Value="Small"/> 
      </Style> 
      <Style TargetType="Label"> 
       <Setter Property="HorizontalOptions" Value="Center"/> 
       <Setter Property="VerticalOptions" Value="Center" /> 
       <Setter Property="TextColor" Value="Blue"/> 
       <Setter Property="FontSize" Value="20"/> 
      </Style> 
      <Style x:Key="baseStyle" TargetType="View"> 
       <Setter Property="HorizontalOptions" Value="Center"/> 
       <Setter Property="VerticalOptions" Value="Center" /> 
      </Style> 
      <Style x:Key="entryStyle" TargetType="Entry" BasedOn="{StaticResource baseStyle}"> 
       <Setter Property="TextColor" Value="Green"/> 
      </Style> 
     </ResourceDictionary> 
    </ContentPage.Resources> 

    <ContentPage.Content> 
     <StackLayout Padding="20"> 
      <Label Text="This is label 1 using implicit style"/> 
      <Label Text="This is label 2"/> 
      <Button 
       Text="Not using the button style" 
        BorderWidth="2" 
       HorizontalOptions="Center" 
       VerticalOptions="Center" 
        WidthRequest="200"/> 
      <Button Style="{StaticResource buttonStyle}" 
        Text="Using explicit style" 
        BorderWidth="2" 
        WidthRequest="200"/> 
      <Entry Style="{StaticResource entryStyle}" Placeholder="This enty uses an inherited style"/> 

      <Button Style="{StaticResource buttonStyle}" 
        Text="Using explicit style" 
        BorderWidth="2" 
        WidthRequest="200"/> 
     </StackLayout> 
    </ContentPage.Content> 
</ContentPage>