uwp - 构建创建 UWP cppwinrt SolidColorBrush 时出错

Question

为文本 block 创建实心画笔 (cppwinrt) 时出现错误，使用:

void MainPage::myStyle(Controls::TextBlock & block)
{   
    block.FontSize(72.0);
    block.Foreground(Media::SolidColorBrush(Windows::UI::Colors::Orange()));
    block.VerticalAlignment(VerticalAlignment::Center);     
}   

error: LNK2019 unresolved external symbol "public: __thiscall winrt::Windows::UI::Xaml::Media::SolidColorBrush::SolidColorBrush(struct winrt::Windows::UI::Color const &)"

当我取出 solidbrush 时出现错误，我也尝试过其他版本的 solidbrush 出现相同的错误。

Answer 1

你需要

#include <winrt/Windows.UI.Xaml.Media.h>

使用来自命名空间 winrt::Windows::UI::Xaml::Media 的类型.这记录在 Get started with C++/WinRT 下:

Whenever you want to use a type from a Windows namespaces, include the corresponding C++/WinRT Windows namespace header file, as shown. The corresponding header is the one with the same name as the type's namespace. For example, to use the C++/WinRT projection for the Windows::Foundation::Collections::PropertySet runtime class, #include <winrt/Windows.Foundation.Collections.h>.