//filehash.h #ifndef FILEHASH_H#define FILEHASH_H //#include <QObject>#include <QFile> #include <QCryptograph ..

warning: base class 'class QObject' should be explicitly initialized in the copy constructor [-Wextra] FileHash::F ..

QtConcurrent::run() 这个线程函数是不是不可以使用信号槽,我一加上emit 程序就异常退出