QT界面分辨率切换：1080P到4K适配指南

///'要在QT界面中将分辨率从1080P切换到4k分辨率，并使用代码进行适配，可以按照以下步骤进行操作：//n//n1. 获取当前屏幕的分辨率信息：//n//ncpp//nQScreen *screen = QGuiApplication::primaryScreen();//nQRect screenGeometry = screen->geometry();//nint screenWidth = screenGeometry.width();//nint screenHeight = screenGeometry.height();//n//n//n2. 将分辨率切换为4k分辨率：//n//ncpp//nQApplication::setAttribute(Qt::AA_EnableHighDpiScaling); //启用高DPI缩放//nQApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); //使用高DPI像素映射//nQApplication::setHighDpiScaleFactorRoundingPolicy(Qt::HighDpiScaleFactorRoundingPolicy::PassThrough); //设置高DPI缩放因子取整策略//n//nQScreen *screen = QGuiApplication::primaryScreen();//nQScreen *newScreen = nullptr;//nQList<QScreen*> screens = QGuiApplication::screens();//nfor (QScreen *s : screens) {//n if (s->geometry().width() >= 3840 && s->geometry().height() >= 2160) { //找到4k分辨率屏幕//n newScreen = s;//n break;//n }//n}//n//nif (newScreen) {//n QApplication::setOverrideCursor(Qt::WaitCursor);//n QApplication::desktop()->setScreen(newScreen); //切换至4k分辨率屏幕//n QApplication::setOverrideCursor(Qt::ArrowCursor);//n}//n//n//n3. 调整界面元素的布局和大小适应新的分辨率：//n//ncpp//n// 在窗口的构造函数或resizeEvent()中调整布局和大小//nint newScreenWidth = newScreen->geometry().width();//nint newScreenHeight = newScreen->geometry().height();//n//n// 调整窗口大小//nthis->resize(newScreenWidth, newScreenHeight);//n//n// 根据新的分辨率重新布局和调整界面元素的大小//n// 例如，使用布局管理器重新布局窗口中的部件//n//n//n通过以上步骤，可以在QT界面中将分辨率从1080P切换到4k分辨率，并使用代码进行适配。//n//n/