Cannot open include file: 'QWidget': No such file or directory

解决方法:(vs2008中)

1、"C/C++" -> "General" ->"Additional Include Directories"中,加入   ;"$(QTDIR)\include\QtNetwork"。

2、debug下:

     “Linker” -> "Input"-> "Additional Dependencies"中,加入 QtNetworkd4.lib

     release下:

      “Linker” -> "Input"-> "Additional Dependencies"中,加入 QtNetwork4.lib

或者:

1、把#include <QNetworkAccessManager>改为#include <QtNetwork/QNetworkAccessManager>

2、debug下:

     “Linker” -> "Input"-> "Additional Dependencies"中,加入 QtNetworkd4.lib

     release下:

      “Linker” -> "Input"-> "Additional Dependencies"中,加入 QtNetwork4.lib

编译,就可以了。

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转载自www.cnblogs.com/sagerking/p/12205398.html