QT undefined reference to vtable for ''
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某一个类中如果加入Q_OBJECT后, 则link时提示:undefined reference to vtable for "xxx::xxx".删掉它则没有任何问题.
同时写的信号也说没有定义。
有时候编译器异常会造成这个问题,重启QT CREATOR, 重新编译OK.
具体是编译器什么问题有待去查证。
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