The QColor ctor taking ints is cheaper than the one taking string literals [clazy-qcolor

QtCreator警告：The QColor ctor taking ints is cheaper than the one taking string literals [clazy-qcolor-from-literal]

产生原因：

QColor("#ffcccc")；

这种方式不推荐，会产生临时的QString

改成下列方式不报警告：

QColor c("#000000"); 改为 QColor c(0, 0, 0) ；

c.setNamedColor("#001122"); 改为 c = QColor(0, 0x11, 0x22) ；

翻译来源：

https://github.com/KDE/clazy/blob/1.11/docs/checks/README-qcolor-from-literal.md

另外一个警告：

Q_PROPERTY should have either NOTIFY or CONSTANT [clazy-qproperty-without-notify]

修改前：
Q_PROPERTY(int RotateAngle READ RotateAngle WRITE setRotateAngle)

报错：
 Q_PROPERTY should have either NOTIFY or CONSTANT [clazy-qproperty-without-notify]

修改后：
Q_PROPERTY(int RotateAngle READ RotateAngle WRITE setRotateAngle NOTIFY RotateAngleChanged)

signals:
    void RotateAngleChanged(const int &rotateAngle);
    
    
然后在setRotateAngle()函数中，
emit RotateAngleChanged(angle);