Qt头文件引用其他类,主类头文件报错(1)invalid use of incomplete type 'class xx::yy' (2)forward declaration of 'class xx::yy' 其实这个错误很蠢,由于代码是从cpp文件直接copy过来的就没仔细看,但是他这个报错很有迷惑性,我们来看图: 就这行代码,从cpp文件中复制过来的: 本来目的呢就是提升这个变量的作...
解决QT:forward declaration of 'struct Ui::xxx';invalid use of incomplete struct "Ui::Widget" 等莫名奇妙错误 今天在进行QT Widget的UI设计时,改了下Widget的对象名,然后在多次成功编译运行后,执行清理,重新构建,就出现了好多莫名奇妙的错误: widget.h:12: 错误:forward declaration of 'struct Ui::Widget'...
D:\Qt\Qt5.10.0\5.10.0\mingw53_32\include/QtCore/qmetatype.h:114:21: note: forward declaration of 'class QVariant' F(QVariant, 41, QVariant) \ ^ D:\Qt\Qt5.10.0\5.10.0\mingw53_32\include/QtCore/qmetatype.h:1924:11: note: in definition of macro 'QT_FORWARD_DECLARE_STATIC_TYP...
D:\Qt\Qt5.10.0\5.10.0\mingw53_32\include/QtCore/qmetatype.h:114:21: note: forward declaration of'class QVariant'F(QVariant,41, QVariant) \ ^ D:\Qt\Qt5.10.0\5.10.0\mingw53_32\include/QtCore/qmetatype.h:1924:11: note: in definition of macro'QT_FORWARD_DECLARE_STATIC_TYPES_ITE...
// Templatehandler.h #ifndef TEMPLATEHANDLER_H #define TEMPLATEHANDLER_H #include <QObject> // Forward declaration of QObject generates error class QListView; // Forward declarations class QTextEdit; class QModelIndex; class QStringListModel; class TemplateHandler : public QObject { Q_OBJECT publ...
error:forward declaration of'class QWebFrame' 解决办法: 在*.pro文件里添加: QT+=webkitwidgets 注意:当有QT += webkitwidgets的时候,就不再需要QT += widgets 此外,更改 #inclue <QtWebKit> 为 #include <QtWebKitWidgets> 打印机不工作 如果你的代码有以下几行: ...
error : forward declaration of 'class QWebFrame' 解决办法: 在*.pro文件里添加: QT += webkitwidgets 注意:当有QT += webkitwidgets的时候,就不再需要QT += widgets 此外,更改 #inclue <QtWebKit> 为 #include <QtWebKitWidgets> 打印机不工作
void CustomClass::SetUI() { mainwidow->ui->pushButton->setText("开始"); } 记得要引用ui_mainwindow.h,不然会报错误:error: member access into incomplete type 'Ui::MainWindow' forward declaration of 'Ui::MainWindow' 1. 2. 3. 4. ...
finddialog.cpp:51:39: error: invalid use of incomplete type ‘class QCheckbox’ Qt::CaseSensitivity cs = caseCheckBox->isChecked() ? Qt::CaseSensitivity ^ In file included from finddialog.cpp:3:0: finddialog.h:6:7: error: forward declaration of ‘class QCheckbox’ ...
C:\Qt\AdditionalLibraries\Qt\qt3d-6.0.1\Src\src\render\surfaces\vulkaninstance_p.h:60:7: note: forward declaration of 'class QVulkanInstance' class QVulkanInstance; ^~~~ jom: C:\Qt\AdditionalLibraries\Qt\qt3d-6.0.1\build-qt3d-Desktop_Qt_6_0_1_MinGW_64_bit-Release\src\render\Makefi...