QFile.write(myStruct)-怎么样? [英] QFile.write( myStruct ) - how?

问题描述

我从Qt开始，并且很长一段时间以来一直陷入一个问题.我确定这只是我在C ++中看不到的东西.无论如何，请查看以下简单代码，并指出我在做什么错:

I'm beginning with Qt and am stuck with a problem supposedly for quite a long time now. I'm sure it's just something I don't see in C++. Anyway, please look at the following simple code and point me what am I doing wrong:

typedef struct FILEHEADER {
    char udfSignature[8];
    char fileName[64];
    long fileVersion;
    UNIXTIME fileCreation;
    UNIXTIME lastRebuild;
    FILEPOINTER descriptor;
} fileheader;

QFile f("nanga.dat");
    if(f.open(QIODevice::ReadWrite));

f.write(fileheader);

Qt 5.2.0向我抛出以下错误消息:

Qt 5.2.0 trows me the following error message:

C:\sw\udb\udb\main.h:113: error: no matching function for call to
'QFile::write(FILEHEADER&)'
         file.write(header);
                          ^

关于如何将该结构写入QFile的任何建议?

Any suggestion on how I can write this struct to a QFile?

谢谢

推荐答案

QFile具有 write 方法，该方法接受任意字节数组.您可以尝试这样的事情:

QFile has write method which accepts arbitrary array of bytes. You can try something like this:

fileheader fh = { ...... };
QFile f("nanga.dat");
if(f.open(QIODevice::ReadWrite))
    f.write(reinterpret_cast<char*>(&fh), sizeof(fh));

但是请记住，一般来说，以这种方式存储任何数据不是一个好主意.

But remember that in general, it's not a good idea to store any data this way.

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