Q_PROPERTY(QHash<QString,int> useCount READ useCount WRITE setUseCount)
在Q_PROPERYTY中使用QHash编译时，通不过。，，。
macro "Q_PROPERYTY" passed 2 arguments, but takes just 1
Q_PROPERTY does not name a type
用QList发现又可以，Q_PROPERTY中泛型参数只能有一个参数么?..
------解决方案--------------------
试一下如何:
typedef QHash<QString,int> QHash_SI;
Q_PROPERTY(QHash_SI useCount READ useCount WRITE setUseCount)