#include "framecapture.h"

#include <iostream>
#include <QtWidget>

int main(int argc, char * argv[])
{
    if (argc != 3) {
        std::cout << "Capture a web page and save its internal frames in different images" << std::endl << std::endl;
        std::cout << "  framecapture <url> <outputfile>" << std::endl;
        std::cout << std::endl;
        std::cout << "Notes:" << std::endl;
        std::cout << "  'url' is the URL of the web page to be captured" << std::endl;
        std::cout << "  'outputfile' is the prefix of the image files to be generated" << std::endl;
        std::cout << std::endl;
        std::cout << "Example: " << std::endl;
        std::cout << "  framecapture qt.nokia.com trolltech.png" << std::endl;
        std::cout << std::endl;
        std::cout << "Result:" << std::endl;
        std::cout << "  trolltech.png (full page)" << std::endl;
        std::cout << "  trolltech_frame1.png (...) trolltech_frameN.png ('N' number of internal frames)" << std::endl;
        return 0;
    }

    QUrl url = QUrl::fromUserInput(QString::fromLatin1(argv[1]));
    QString fileName = QString::fromLatin1(argv[2]);

    QApplication a(argc, argv);
    FrameCapture capture;
    QObject::connect(&capture, SIGNAL(finished()), QApplication::instance(), SLOT(quit()));
    capture.load(url, fileName);

    return a.exec();
}


我得到QtWidget文件或目录找不到。当我使用QWidget时,会说


  /home/me/qtwebkit-examples-and-demos/examples/webkit/framecapture-build-desktop/../framecapture/main.cpp:68:
  错误:变量“ QApplication a”具有初始化程序,但类型不完整
  
  /home/me/qtwebkit-examples-and-demos/examples/webkit/framecapture-build-desktop/../framecapture/main.cpp:70:
  错误:嵌套名称说明符中使用了不完整的类型“ QApplication”


我不知道为什么git://gitorious.org/+qt-developers/qt/qtwebkit-examples-and-demos-staging.git中的所有示例都不起作用。似乎总是抱怨#include找不到所需的组件。

最佳答案

您只需要包括QApplication。那是:

#include <QApplication>


如果我没记错的话,就没有<QtWidget>这样的包含文件。那应该是<QWidget>。给定特定的示例,我希望可以改为包含<QtGui>

关于c++ - 试图让Qt4示例在安装了Qt Creator 4的ubuntu 10.10上运行,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/11409446/

10-11 19:11