How to use the .mm file in Qt Project for IOS?

[TheCrowKaka]

Hello

I refer to this post regarding getting the UUID on IOS.

Re: iOS UDID or similar

I am thoroughly confused on the steps to be taken in order to do this.

QString UserPreferenceUtility::getMacAddress()
{
    NSString* mac_address = @"00-00-00-00-00-00-00-01";
    if ([[UIDevice currentDevice] respondsToSelector:@selector(identifierForVendor)]) {
        mac_address = [[[UIDevice currentDevice] identifierForVendor] UUIDString];
    }
    return QString::fromNSString(mac_address);
}

Where am I supposed to put this? Is this to be put in a new .mm file and incorporate in the project or else what?

I tried to find out how to do that but it seems there is hardly any documentation on this.

Can someone please elaborate on the exact steps to do this?

[Schluchti]

Just put it in the ios section of your pro file.

Here you have a sample pro file that contains a *.mm file: https://github.com/gympulsr/qt-pushnotifications/blob/master/qt-pushnotifications.pro

[TheCrowKaka]

Thanks Schluchti

That answers the basic question of adding the .mm file to the project.

But it does not end here... the code given in the refered post is not a complete .mm type code. Please excuse me as i am totally ignorant about the .mm files. But what i do understand is that QString is not a cocoa code but a Qt Code..

So If I just copy the code from the refered post to a macaddress.mm file, I get two errors

error: unknown type name 'QString'
QString UserPreferenceUtility::getMacAddress()
^
and
error: use of undeclared identifier 'UserPreferenceUtility'
QString UserPreferenceUtility::getMacAddress()
^
I know I am not doing things the right way... but what is the right way?

[Schluchti]

@TheCrowKaka

That's probably because you are missing the header file. It should work the following way:

Create a userpreferenceutility.h file with the following content:

#ifndef USERPREFERENCEUTILITY_H
#define USERPREFERENCEUTILITY_H

#include <QObject>
#include <QString>

class UserPreferenceUtility{
    Q_OBJECT
public:
    UserPreferenceUtility(QObject* parent = 0);
   ~UserPreferenceUtility();
   QString getMacAddress();
};

#endif /*USERPREFERENCEUTILITY_H*/

Then add the file to the ios section of your pro file:

ios{
    HEADERS += $$PWD/path_to_your_file/userpreferenceutility.h \
}

Next, implement the userpreferenceutility.mm:

#include "userpreferenceutility.h"

UserPreferenceUtility::UserPreferenceUtility(QObject *parent)
        : QObject(parent)
 {
 }

QString UserPreferenceUtility::getMacAddress()
{
    NSString* mac_address = @"00-00-00-00-00-00-00-01";
    if ([[UIDevice currentDevice] respondsToSelector:@selector(identifierForVendor)]) {
        mac_address = [[[UIDevice currentDevice] identifierForVendor] UUIDString];
    }
    return QString::fromNSString(mac_address);
}

UserPreferenceUtility::~UserPreferenceUtility(){
}

And add the file also to the ios section of your pro file. That means you pro file should now look like similar to this:

ios{
    HEADERS += $$PWD/path_to_your_file/userpreferenceutility.h \
    OBJECTIVE_SOURCES +=   $$PWD/path_to_your_file/userpreferenceutility.h \
}

Just typed that by heart, so there might be compiling errors ;)

[TheCrowKaka]

Thanks

It works perfect.