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把头文件包含放到了cpp里面，报错消失了，可能是头文件包含设计不够精巧，导致编译器并不能理解类之间的关系 |
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more concrete is better. |
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这里的QList的存储的是BaseCloseDefender指针，BaseCloseDefender继承自BaseDefender，BaseDefender继承自BaseActionUnit
BaseActionUnit继承自QGraphicObject，自身是一个抽象类
GetHealth是BaseActionUnit的方法，在BaseActionUnit中宏定义了一个属性Q_PROPERTY unsigned Health ,GetHealth是它的READ函数，非虚函数
在子类型使用GetHealth方法时报错
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