在Qt项目中使用(hashlip ++)时出现问题 [英] Problem using (hashlip++) in qt project

问题描述

我正在使用(HashLib ++)创建文件的哈希应用程序
但是当我用Qt Creator测试(Library)时，给我一个错误

这是错误的图片

$屏幕快照148.png-Google云端硬盘 [

i''m making a file''s hashing app using a (HashLib++)
but when i test the (Library) with the Qt Creator it gives me an error

here is the pic of the errors

$Screenshot 148.png - Google Drive[^]

honestly i don''t know what''s make this error
i tried many things but no luck

What I have tried:

i tried a lot of solutions but no luck

推荐答案

屏幕截图148.png-Google云端硬盘 [

Screenshot 148.png - Google Drive[^]

honestly i don''t know what''s make this error
i tried many things but no luck

What I have tried:

i tried a lot of solutions but no luck

请不要发布指向图像的外部链接.您只有几行代码和一条错误消息可以在此处发布.

如果您这样做了，我将能够将代码复制并粘贴到我的答案中，向您展示如何解决该问题.但是，这样您只会得到一个文本答案.

错误消息很清楚，并且有一个小箭头指示传递的参数file02是罪魁祸首.以下几行告诉您，有一个候选人(我必须输入才能知道！):

Please don''t post external links to images. You only have a few lines of code and an error message that can be posted here.

If you had done that I would be able to copy and paste the code into my answer showing you how to solve the problem. But so you will only get a textual answer.

The error message is quite clear and a small arrow indicates that the passed argument file02 is the culprit. The following lines tell you that there is a candidate (I have to type it know!):

virtual std::string hashwrapper::getHashFromFile(std::string)

您正在传递类型为QFile的file02，但是函数getHashFromFile期望为std::string.

假设参数是文件名，则可以从中创建std::string后使用file01，其类型为QString:

You are passing file02 which is of type QFile but the the function getHashFromFile expects a std::string.

Assuming that the parameter is a file name, you can use file01 which is of type QString after creating a std::string from that:

QString Z_01 = file_hashing->getHashFromFile(file01.toStdString());

我错过了将结果分配给QString的情况.所以应该是:

I missed that the result is assigned to a QString. So it should be:

QString Z_01 = QString::fromStdString(file_hashing->getHashFromFile(file01.toStdString()));

[/EDIT]


回答提出的新问题作为解决方案:

[/EDIT]


Answering a new question raised as solution:

mainwindow.o:-1: In function `__static_initialization_and_destruction_0':
error: undefined reference to `md5wrapper::md5wrapper()'
error: collect2: error: ld returned 1 exit status

您必须链接到包含md5wrapper的库.
为此，将库添加到Qt项目文件中的LIBS配置中.另请参见向项目中添加库| Qt创建者手册 [ ^ ].

You must link with library containing md5wrapper.
To do this add the library to the the LIBS configuration in your Qt project file. See also Adding Libraries to Projects | Qt Creator Manual[^].

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