Windows配置Qt环境变量的全指南

-DCMAKE_PREFIX_PATH=C:/Qt/6.7.2/msvc2019_64

-DCMAKE_TOOLCHAIN_FILE=C:/vcpkg/scripts/buildsystems/vcpkg.cmake

# PowerShell 脚本示例
$qtDir = "C:\Qt\6.7.2\msvc2019_64"
$qtBin = "$qtDir\bin"
$qtPlugins = "$qtDir\plugins"
$qtPlatform = "$qtPlugins\platforms"

if (Test-Path $qtDir) {
    Set-Item -Path "Env:QT_PLUGIN_PATH" -Value $qtPlugins
    Set-Item -Path "Env:QT_QPA_PLATFORM_PLUGIN_PATH" -Value $qtPlatform
    if ((Test-Path $qtBin) -and ($env:Path -notlike "*$qtBin*")) {
        $env:Path += ";$qtBin"
    }
    Write-Host "✅ Qt 环境变量已设置"
    Write-Host "    QT_PLUGIN_PATH = $qtPlugins"
    Write-Host "    QT_QPA_PLATFORM_PLUGIN_PATH = $qtPlatform"
} else {
    Write-Warning "⚠️ 未找到 Qt 路径：$qtDir"
}

MyQtApp/
├── CMakeLists.txt
└── main.cpp

#include <QApplication>
#include <QPushButton>

int main(int argc, char *argv[]) {
    QApplication app(argc, argv);
    QPushButton btn("Hello Qt!");
    btn.show();
    return app.exec();
}

cmake_minimum_required(VERSION 3.21)
project(MyQtApp LANGUAGES CXX)

set(CMAKE_CXX_STANDARD 17)

find_package(Qt6 REQUIRED COMPONENTS Widgets)

add_executable(MyQtApp main.cpp)
target_link_libraries(MyQtApp PRIVATE Qt6::Widgets)

set CMAKE_PREFIX_PATH=C:\Qt\6.7.2\msvc2019_64
cmake -B build -S .
cmake --build build