Question

使用Qt5构建Qt4项目时出现编译时错误：

error: no matching function for call to 'MainWindow::connect(QPrintPreviewWidget*, const char*, MainWindow*, const char*)'
         connect( dlgPrintPreview.previewWidget(), SIGNAL( paintRequested( QPrinter* ) ), this, SLOT( printConflictReport( QPrinter* ) ) );
                                                                                                                                         ^
...

C:\Qt\5.4\mingw491_32\include/QtCore/qobject.h:196:36: note: static QMetaObject::Connection QObject::connect(const QObject*, const char*, const QObject*, const char*, Qt::ConnectionType)
     static QMetaObject::Connection connect(const QObject *sender, const char *signal,
                                    ^
C:\Qt\5.4\mingw491_32\include/QtCore/qobject.h:196:36: note:   no known conversion for argument 1 from 'QPrintPreviewWidget*' to 'const QObject*'

我在 .pro 文件中加入 printsupport 和小部件，将 QtGui 替换为 QtWidget - 没什么好帮的！我究竟做错了什么？任何帮助表示赞赏

从Qt4迁移到Qt5：没有匹配功能

0 个答案: