• 1.调用系统API

#include <IOKit/IOKitLib.h>
#include <iostream>
using namespace std;
QString GetMacUUID()
{
    char buf[512] = "";
    int bufSize = sizeof(buf);
    io_registry_entry_t ioRegistryRoot = IORegistryEntryFromPath(kIOMasterPortDefault, "IOService:/");
    CFStringRef uuidCf = (CFStringRef) IORegistryEntryCreateCFProperty(ioRegistryRoot, CFSTR(kIOPlatformUUIDKey), kCFAllocatorDefault, 0);
    IOObjectRelease(ioRegistryRoot);
    CFStringGetCString(uuidCf, buf, bufSize, kCFStringEncodingMacRoman);
    CFRelease(uuidCf);
    QString qsUUID(buf);
    return qsUUID;
}

配置文件中添加依赖

macx {
   LIBS += -framework CoreFoundation -framework IOKit
}

• 2.通过调用命令行

QString GetMacUUID()
{
    QString ret = "";
    QProcess proc;
    QStringList args;
    args << "-c" << "ioreg -rd1 -c IOPlatformExpertDevice |  awk '/IOPlatformUUID/ { print $3; }'";
    proc.start( "/bin/bash", args );
    proc.waitForStarted(-1);
    proc.waitForFinished(-1);      //-1的意思就是等待你的事件真的结束
    ret = proc.readAll();
    ret.replace("\n","");
    ret.replace("\"", "");
    ret.replace("\\", "");
    return ret;
}