当你在Qt开发中遇到error C2338: qobject_cast requires the type to have a Q_OBJECT macro这个编译错误时,这通常意味着你试图使用qobject_cast来转换一个并不包含Q_OBJECT宏的类。为了解决这个问题,你可以按照以下步骤进行: 1. 理解错误信息的含义 qobject_cast是Qt中用于在运行时安全地将一个QObject指针(或...
QObject also offers a Java-style typechecking function, inherits(). Unlike qobject_cast, inherits() accepts a char* type name instead of a type expression. This operation is slower than qobject_cast because it requires an extra hashtable lookup, but it can be useful if you need input-dri...