QT5.14.1 generate dynamic link library

table of Contents

First, create a project

1. Create a project Libaray

2, Project Name

3, select the language

4. Select the compiler

5, select the version control

Second, the writing test code

1, file directory

2, written in .h files

3, write .cpp file

Third, the project is compiled

1, view the file directory

2. Cancel create the build directory

3, build (compile) the project

4, view the compiled file

---

First, create a project

1. Create a project Libaray

Qt Creator into the main interface, click on New -> Libaray -> C ++ Libaray

2, Project Name

Fill in name here InitDll (just named), has since been default, the next step

3, select the language

Chinese language can be selected, recommended here do not choose Language

4. Select the compiler

QT installation of the compiler will be selected, where the recommended compiler on Select All

5, select the version control

If the project uses Git or svn select, where this is not selected by default, click Finish

Second, the writing test code

1, file directory

After creating the Library Project, the project will generate the following files

2, written in .h files

Here initdll.h file can be understood as Java interfaces

#ifndef INITDLL_H
#define INITDLL_H

#include "InitDll_global.h"

class INITDLL_EXPORT InitDll
{
public:
    InitDll();
    QString print(QString str);
    int add(int a,int b);
};

#endif // INITDLL_H

3, write .cpp file

Here .cpp file can be understood as the realization of Java classes

#include "initdll.h"
#include <QString>
InitDll::InitDll()
{
}

QString InitDll::print(QString str)
{
    return str;
}

int InitDll::add(int a, int b)
{
    return a+b;
}

Here is a tip, the mouse to select the method name, pressed Alt and Enter keys can be quickly generated implementation of the method body 

Third, the project is compiled

1, view the file directory

Right-click the project in the file, select Show in explorer, you can quickly open directory project under Windows

We can see before compiling only five documents, namely .cpp, .h, .pro, .pro.user, _global.h file

2. Cancel create the build directory

The main interface click on the project, click Shadow build build directory check box to remove the check

Remove the tick will compile the files generated in the current directory project

Otherwise, the directory will be created automatically compile a file stored compiled

3, build (compile) the project

After returning to the formula bar, right-click the project, click on the building (constructed is actually a compilation of the meaning)

4, view the compiled file

 After you've built, open directory project, the project found inside a few more documents

Compiled mainly produced three documents .dll, .a, .o file

So far, Qt5.14.1 generate dynamic link library tutorial has been completed

Next, teach you how to use Qt5.14.1 mobilize a dynamic link library (.dll and .h files)