How to call macOS APIs from c++/qt application?

[Taytoo]

I need to call a native macOS API: NSHost to get localizedName of the mac but no idea how to call either Objective-C or Swift version of the API.

PS. Don't know anything about objective-C or Swift, new to macOS development.

[mpergand]

HI,

1. create a new file with .mm extension
2. write your c ++ function in it
3. call it from your Qt app

example:
MacUtils.h

class MacUtils
{

		MacUtils() {}

	public:

    static QString  localizedHostName();
};

MacUtils.mm

#import <Cocoa/Cocoa.h>
#include "MacUtils.h"


QString MacUtils::localizedHostName()
{
    NSString* name=[[NSHost currentHost] localizedName];

    return QString::fromNSString(name);
}

Call it like this:

#include "MacUtils.h"

int main(int argc, char *argv[])
{
    QString name=MacUtils::localizedHostName();
    qDebug()<<name;
}

For me prints: iMac de Jean

[mpergand]

HI,

1. create a new file with .mm extension
2. write your c ++ function in it
3. call it from your Qt app

example:
MacUtils.h

class MacUtils
{

		MacUtils() {}

	public:

    static QString  localizedHostName();
};

MacUtils.mm

#import <Cocoa/Cocoa.h>
#include "MacUtils.h"


QString MacUtils::localizedHostName()
{
    NSString* name=[[NSHost currentHost] localizedName];

    return QString::fromNSString(name);
}

Call it like this:

#include "MacUtils.h"

int main(int argc, char *argv[])
{
    QString name=MacUtils::localizedHostName();
    qDebug()<<name;
}

For me prints: iMac de Jean

[Taytoo]

@mpergand Simple, to the point and it works. Merci!

When I was trying to find a solution, noticed some people saying that I have to add framework reference in .pro file e.g.

macx {
    LIBS += -framework CoreServices
    LIBS += -framework Foundation
    LIBS += -framework CoreFoundation
}

Your code works without the framework references. Are macOS framework references Not needed at all OR are they needed in some cases?

[SGaist]

Hi,

It will depend on what API you use. If they fall in frameworks already used by Qt, they will already be part of the linker options.

[mpergand]

@Taytoo

I add this to my .pro :

macx {   # l'accolade doit se trouver sur la même ligne, sinon erreur sur linux

 LIBS +=	-framework AppKit
}