为啥我写的QFtp下载不了小文件
//头文件里 QFtp *ftp; QFile *file; //构造函数里 file = new QFile(filename); //filename是文件名 file->open(QIODevice::WriteOnly); ftp = new QFtp; ftp->connectToHost(url.host(), url.port(21)); ftp->login(url.userName(), url.password()); ftp->get(filename, file); ftp->close(); file->close();