qt6 编译还是有些许问题，建议适配下

1、报错找不到qsort
![输入图片说明](https://foruda.gitee.com/images/1666851011097792542/a75b872c_8035508.png "屏幕截图")
`CatTableModel.cpp 添加 #include <stdlib.h>`

2、11处找不到QDesktopWidget.h均需替换
因为QApplication::desktop()废弃了， 换成了 QApplication::primaryScreen()

```
//#include <QDesktopWidget>
#if (QT_VERSION > QT_VERSION_CHECK(5,0,0))
#include "qscreen.h"
#define deskGeometry qApp->primaryScreen()->geometry()
#define deskGeometry2 qApp->primaryScreen()->availableGeometry()
#else
#include "qdesktopwidget.h"
#define deskGeometry qApp->desktop()->geometry()
#define deskGeometry2 qApp->desktop()->availableGeometry()
#endif
```

3、HighQualityAntialiasing找不到
原因qt6该函数被替代：As per Qt Documentation This value HighQualityAntialiasing is obsolete and will be ignored, use the Antialiasing render hint instead
use QPainter::Antialiasing

```
RimlessWindow.cpp 305
#if (QT_VERSION >= QT_VERSION_CHECK(6,0,0))
painter.setRenderHints(QPainter::Antialiasing | QPainter::Antialiasing);
#else
    painter.setRenderHints(QPainter::Antialiasing | QPainter::HighQualityAntialiasing);
#endif
```
4、报错Qt:TextColorRole找不到
5、报错QPalette::Background找不到
qt6中应改QPalette::Background为QPalette::Window
6、报错Qt::TextColorRole找不到
qt6应改为Qt::ForegroundRole
7、QApplication::desktop()应改为QApplication::primaryScreen()

graycatya/CatLearnQt

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