诸如'XXX' was not declared in this scope， undefined reference to `XXX'解决办法

错误:'QSqlTableModel' was not declared in this scope

加入头文件

  
 
 #include<QtSql/QSqlTableModel>
  
 
 

即可。

错误:'QTableView' was not declared in this scope

加入头文件

  
 
 #include<QTableView>
  
 
 

即可。

此时又出现这样的错误

undefined reference to `QSqlDatabase::~QSqlDatabase()'

在.pro文件加入这句

  
 
 QT+=sql
  
 
 

即可。

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