error: request for member which is of non-class type

近期学员实践QT项目，遇到如下问题：

non-class type1

C:\Users\Johnaon\Documents\untitled1\httppostrequest.cpp:15: error: request for member 'setHeader' in 'request', which is of non-class type 'QNetworkRequest(QUrl)'
C:/Users/Johnaon/Documents/untitled1/httppostrequest.cpp:15:13: error: request for member 'setHeader' in 'request', which is of non-class type 'QNetworkRequest(QUrl)'
15 | request.setHeader(QNetworkRequest::KnownHeaders::ContentTypeHeader,

看对应的头文件，也有setHeader函数。

non-class type2

setHeader(knownHeaders, const QVanant &): void
QHttpHeaders headers()const;
void setHeaders(const QHttpHeaders &newHeaders);void setHeaders(QHttpHeaders &&newHeaders);
//"cooked" headers
QVariant header(KnownHeaders header)const;void setHeader(KnownHeaders header, const QVariant &value);
// raw headers:Hif QT_NETWORK_REMOVED_SINCE(6, 7)
bool hasRawHeader(const QByteArray &headerName) const;tendif
bool hasRawHeader(QAnyStringView headerName)const;QList<QByteArray>rawHeaderList()const;
QByteArray rawHeader(const QByteArray &headerName) const;

这问题在类对象上，不是setHeader上，QNetworkRequest(QUrl)不是一个有效的类对象，也就是说QNetworkRequest(QUrl)没有对应的构造函数。这反应了基础知识在复杂环境下不能正常使用，不敢怀疑自己的错误想法。

友情链接

CAD培训 / ERP管理系统