Qt for Mac阻止MacOS系统休眠

Qt开发的应用程序如果电脑休眠了会影响软件的使用，因此在软件的使用过程中需要防止电脑休眠，在Win上有专门的API进行处理，在Mac上也必需使用Mac平台自身的API，本篇介绍在Mac平台下使用Qt阻止Mac系统休眠。

要调用Mac系统的API，得需要添加Object- C的语言文件，这里得创建两个文件mactools.h和 mactools.mm的文件

在工程文件中添加Mac的库

mac:{
#    DEFINES += PRODUCTLIBS += -framework IOKitLIBS += -framework CoreFoundationOBJECTIVE_SOURCES += mactools.mmOBJECTIVE_HEADERS += mactools.h#程序图标
#    ICON = logo.icnsVERSION = 2.0.1.1
}

休眠功能代码：

//官方例子用的文字说明
CFStringRef reasonForActivity = CFSTR("QtforMac App");
IOReturn success = IOPMAssertionCreateWithName(kIOPMAssertionTypeNoDisplaySleep, kIOPMAssertionLevelOn, reasonForActivity, &assertionID);

软件退出后，得还电脑原休眠状态

IOReturn success = IOPMAssertionRelease(assertionID);

完整的代码如下：

QtPreventSystemSleep.pro

QT       += core guigreaterThan(QT_MAJOR_VERSION, 4): QT += widgetsCONFIG += c++11# The following define makes your compiler emit warnings if you use
# any Qt feature that has been marked deprecated (the exact warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS# You can also make your code fail to compile if it uses deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
#mac环境配置
mac:{
#    DEFINES += PRODUCTLIBS += -framework IOKitLIBS += -framework CoreFoundationOBJECTIVE_SOURCES += mactools.mmOBJECTIVE_HEADERS += mactools.h#程序图标
#    ICON = logo.icnsVERSION = 2.0.1.1
}SOURCES += \main.cpp \dialog.cppHEADERS += \dialog.hFORMS += \dialog.ui# Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target

mactools.h

#ifndef MACTOOLS_H
#define MACTOOLS_H/** brief: Mac系统阻止休眠* author:chenyijun* date:  2024-03-17*/class MacTools {
public:bool preventSleep();bool recoverSleep();private:bool isPrevent{false};
};#endif // MACTOOLS_H

mactools.cpp文件

#include "mactools.h"
#import <CoreFoundation/CoreFoundation.h>  //mac头文件
#import <IOKit/pwr_mgt/IOPMLib.h>            //mac头文件
#include <QDebug>
#include <QDateTime>#define PRINTTIME QDateTime::currentDateTime().toString("yyyy.MM.dd hh:mm:ss.zzz");IOPMAssertionID assertionID;bool MacTools::preventSleep()
{//限制不重复执行if(isPrevent)return true;//官方例子用的文字说明CFStringRef reasonForActivity = CFSTR("AtomStack Studio");IOReturn success = IOPMAssertionCreateWithName(kIOPMAssertionTypeNoDisplaySleep, kIOPMAssertionLevelOn, reasonForActivity, &assertionID);isPrevent = (success == kIOReturnSuccess);qDebug() << __FUNCTION__ << " isPrevent=============" << isPrevent << assertionID << PRINTTIME;return isPrevent;
}bool MacTools::recoverSleep()
{//执行过才支持取消if(!isPrevent)return true;IOReturn success = IOPMAssertionRelease(assertionID);qDebug() << __FUNCTION__ << " isPrevent=============" << isPrevent << assertionID << PRINTTIME;return success == kIOReturnSuccess;
}

dialog.h

#ifndef DIALOG_H
#define DIALOG_H#include <QDialog>class QTimer;QT_BEGIN_NAMESPACE
namespace Ui { class Dialog; }
QT_END_NAMESPACEclass Dialog : public QDialog
{Q_OBJECTpublic:Dialog(QWidget *parent = nullptr);~Dialog();void initData();private:Ui::Dialog *ui;QTimer *m_timer;
};
#endif // DIALOG_H

dialog.cpp

#include "dialog.h"
#include "ui_dialog.h"
#include <QTimer>
#include <QDateTime>
#include <QDebug>//#define PRINTTIME QDateTime::currentDateTime().toString("yyyy.MM.dd hh:mm:ss.zzz");Dialog::Dialog(QWidget *parent): QDialog(parent), ui(new Ui::Dialog)
{ui->setupUi(this);this->setWindowTitle("Qt for Mac 阻止系统休眠");initData();
}Dialog::~Dialog()
{delete ui;
}void Dialog::initData()
{QFont font = qApp->font();font.setPixelSize(20);ui->label->setFont(font);ui->label->setStyleSheet("QLabel{background-color:#0000ff;color:#FF0000;}");ui->label->setAlignment(Qt::AlignCenter);m_timer = new QTimer();QObject::connect(m_timer, &QTimer::timeout, [&]() {//QString strTime = QDateTime::currentDateTime().toString("yyyy.MM.dd hh:mm:ss");QString strTime = QDateTime::currentDateTime().toString("hh:mm:ss");ui->label->setText(strTime);ui->label->update();qDebug() << "strTime==========================" << strTime;});m_timer->start(1000);
}

main.cpp

阻止系统休眠使用代码

#include "dialog.h"#include <QApplication>#ifdef Q_OS_MAC
#include "mactools.h"
#endifint main(int argc, char *argv[])
{QApplication a(argc, argv);
#ifdef Q_OS_MAC//开启阻止休眠MacTools macTools;macTools.preventSleep();
#endifDialog w;w.show();int ret = a.exec();
#ifdef Q_OS_MAC//程序退出还原系统休眠状态macTools.recoverSleep();
#endifreturn ret;
}

运行：