No such slot ImgProcessor::Qapplication::aboutQt()?

oceanqterwind

看了Qt5开发及实例源码CH501_ImageProcessor.
运行一下出现：
QObject::connect: No such slot ImgProcessor:application::aboutQt() in ..\ImageProcessor\imgprocessor.cpp:130
QObject::connect: No such signal QTextEdit::currentCharFormatChanged(QtextCharFormat&) in ..\ImageProcesso。

这是怎么回事呢？
源码在这里：

hjbqly

只想说，我现在源码，还扣我Qter豆!!!!!!!!
1：QApplication::aboutQt() ;把a大写；
2：showWidget->text（）；加上括号

libaic

很可能你有代码未输入完全，看看是不是指针没初始化。可以照着书里检查一遍，我运行是没问题的

jithf

楼主问题解决了吗，我问题和你一样唉

明天你好啊

了Qt5开发及实例源码CH501_ImageProcessor.
运行一下出现：
QObject::connect: No such slot ImgProcessor:application::aboutQt() in ..\ImageProcessor\imgprocessor.cpp:130
QObject::connect: No such sig

和煦阳光

jithf 发表于 2019-4-9 12:38
楼主问题解决了吗，我问题和你一样唉

    //"关于"动作
    aboutAction =new QAction(tr("关于"),this);
    connect(aboutAction,SIGNAL(triggered()),qApp,SLOT(aboutQt()));

这样更改就可以了

s_shuang

第一改用QMessageBox::aboutQt
aboutAction = new QAction(tr("关于"), this);
connect(aboutAction, &QAction::triggered, this, &ImgProcess::ShowAboutQT);
void ImgProcess::ShowAboutQT()
{
    QMessageBox::aboutQt(this);
}
第二个改成：
connect(showWidget->text, &QTextEdit::currentCharFormatChanged, this, &ImgProcess::ShowCurrentFormatChanged);