QOperatingSystemVersion Class

The QOperatingSystemVersion class provides information about the operating system version. More...

Header: #include <QOperatingSystemVersion>
qmake: QT += core
Since: Qt 5.9

Public Types

enum OSType { Android, IOS, MacOS, TvOS, ..., Unknown }

Public Functions

QOperatingSystemVersion(const QOperatingSystemVersion &other) = default
QOperatingSystemVersion(OSType osType, int vmajor, int vminor = -1, int vmicro = -1)
bool isAnyOfType(std::initializer_list<OSType> types) const
int majorVersion() const
int microVersion() const
int minorVersion() const
QString name() const
int segmentCount() const
OSType type() const

Static Public Members

const QOperatingSystemVersion AndroidJellyBean
const QOperatingSystemVersion AndroidJellyBean_MR1
const QOperatingSystemVersion AndroidJellyBean_MR2
const QOperatingSystemVersion AndroidKitKat
const QOperatingSystemVersion AndroidLollipop
const QOperatingSystemVersion AndroidLollipop_MR1
const QOperatingSystemVersion AndroidMarshmallow
const QOperatingSystemVersion AndroidNougat
const QOperatingSystemVersion AndroidNougat_MR1
const QOperatingSystemVersion MacOSHighSierra
const QOperatingSystemVersion MacOSSierra
const QOperatingSystemVersion OSXElCapitan
const QOperatingSystemVersion OSXMavericks
const QOperatingSystemVersion OSXYosemite
const QOperatingSystemVersion Windows7
const QOperatingSystemVersion Windows8
const QOperatingSystemVersion Windows10
const QOperatingSystemVersion Windows8_1
QOperatingSystemVersion current()

Detailed Description

The QOperatingSystemVersion class provides information about the operating system version.

Unlike other version functions in QSysInfo, QOperatingSystemVersion provides access to the full version number that developers typically use to vary behavior or determine whether to enable APIs or features based on the operating system version (as opposed to the kernel version number or marketing version).

This class is also a complete replacement for QSysInfo::macVersion and QSysInfo::windowsVersion, additionally providing access to the third (micro) version number component.

Presently, Android, Apple Platforms (iOS, macOS, tvOS, and watchOS), and Windows are supported.

The majorVersion(), minorVersion(), and microVersion() functions return the parts of the operating system version number based on:

PlatformsValue
Androidresult of parsing android.os.Build.VERSION.RELEASE using QVersionNumber, with a fallback to android.os.Build.VERSION.SDK_INT to determine the major and minor version component if the former fails
Apple PlatformsmajorVersion, minorVersion, and patchVersion from NSProcessInfo.operatingSystemVersion
WindowsdwMajorVersion, dwMinorVersion, and dwBuildNumber from RtlGetVersion - note that this function ALWAYS return the version number of the underlying operating system, as opposed to the shim underneath GetVersionEx that hides the real version number if the application is not manifested for that version of the OS

Because QOperatingSystemVersion stores both a version number and an OS type, the OS type can be taken into account when performing comparisons. For example, on a macOS system running macOS Sierra (v10.12), the following expression will return false even though the major version number component of the object on the left hand side of the expression (10) is greater than that of the object on the right (9):

This allows expressions for multiple operating systems to be joined with a logical OR operator and still work as expected. For example:

auto current = QOperatingSystemVersion::current();
if (current >= QOperatingSystemVersion::OSXYosemite ||
    current >= QOperatingSystemVersion(QOperatingSystemVersion::IOS, 8)) {
    // returns true on macOS >= 10.10 and iOS >= 8.0, but false on macOS < 10.10 and iOS < 8.0
}

A more naive comparison algorithm might incorrectly return true on all versions of macOS, including Mac OS 9. This behavior is achieved by overloading the comparison operators to return false whenever the OS types of the QOperatingSystemVersion instances being compared do not match. Be aware that due to this it can be the case x >= y and x < y are BOTH false for the same instances of x and y.

Member Type Documentation

enum QOperatingSystemVersion::OSType

This enum provides symbolic names for the various operating system families supported by QOperatingSystemVersion.

ConstantValueDescription
QOperatingSystemVersion::Android6The Google Android operating system.
QOperatingSystemVersion::IOS3The Apple iOS operating system.
QOperatingSystemVersion::MacOS2The Apple macOS operating system.
QOperatingSystemVersion::TvOS4The Apple tvOS operating system.
QOperatingSystemVersion::WatchOS5The Apple watchOS operating system.
QOperatingSystemVersion::Windows1The Microsoft Windows operating system.
QOperatingSystemVersion::Unknown0An unknown or unsupported operating system.

Member Function Documentation

[default] QOperatingSystemVersion::QOperatingSystemVersion(const QOperatingSystemVersion &other)

Copy constructor.

QOperatingSystemVersion::QOperatingSystemVersion(OSType osType, int vmajor, int vminor = -1, int vmicro = -1)

Constructs a QOperatingSystemVersion consisting of the OS type osType, and major, minor, and micro version numbers vmajor, vminor and vmicro, respectively.

[static] QOperatingSystemVersion QOperatingSystemVersion::current()

Returns a QOperatingSystemVersion indicating the current OS and its version number.

bool QOperatingSystemVersion::isAnyOfType(std::initializer_list<OSType> types) const

Returns whether the OS type identified by the QOperatingSystemVersion matches any of the OS types in types.

int QOperatingSystemVersion::majorVersion() const

Returns the major version number, that is, the first segment of the operating system's version number.

See the main class documentation for what the major version number is on a given operating system.

-1 indicates an unknown or absent version number component.

See also minorVersion() and microVersion().

int QOperatingSystemVersion::microVersion() const

Returns the micro version number, that is, the third segment of the operating system's version number.

See the main class documentation for what the micro version number is on a given operating system.

-1 indicates an unknown or absent version number component.

See also majorVersion() and minorVersion().

int QOperatingSystemVersion::minorVersion() const

Returns the minor version number, that is, the second segment of the operating system's version number.

See the main class documentation for what the minor version number is on a given operating system.

-1 indicates an unknown or absent version number component.

See also majorVersion() and microVersion().

QString QOperatingSystemVersion::name() const

Returns a string representation of the OS type identified by the QOperatingSystemVersion.

See also type().

int QOperatingSystemVersion::segmentCount() const

Returns the number of integers stored in the version number.

OSType QOperatingSystemVersion::type() const

Returns the OS type identified by the QOperatingSystemVersion.

See also name().

Member Variable Documentation

const QOperatingSystemVersion QOperatingSystemVersion::AndroidJellyBean

This variable holds a version corresponding to Android Jelly Bean (version 4.1, API level 16).

This documentation was introduced in Qt 5.9.

const QOperatingSystemVersion QOperatingSystemVersion::AndroidJellyBean_MR1

This variable holds a version corresponding to Android Jelly Bean, maintenance release 1 (version 4.2, API level 17).

This documentation was introduced in Qt 5.9.

const QOperatingSystemVersion QOperatingSystemVersion::AndroidJellyBean_MR2

This variable holds a version corresponding to Android Jelly Bean, maintenance release 2 (version 4.3, API level 18).

This documentation was introduced in Qt 5.9.

const QOperatingSystemVersion QOperatingSystemVersion::AndroidKitKat

This variable holds a version corresponding to Android KitKat (versions 4.4 & 4.4W, API levels 19 & 20).

This documentation was introduced in Qt 5.9.

const QOperatingSystemVersion QOperatingSystemVersion::AndroidLollipop

This variable holds a version corresponding to Android Lollipop (version 5.0, API level 21).

This documentation was introduced in Qt 5.9.

const QOperatingSystemVersion QOperatingSystemVersion::AndroidLollipop_MR1

This variable holds a version corresponding to Android Lollipop, maintenance release 1 (version 5.1, API level 22).

This documentation was introduced in Qt 5.9.

const QOperatingSystemVersion QOperatingSystemVersion::AndroidMarshmallow

This variable holds a version corresponding to Android Marshmallow (version 6.0, API level 23).

This documentation was introduced in Qt 5.9.

const QOperatingSystemVersion QOperatingSystemVersion::AndroidNougat

This variable holds a version corresponding to Android Nougat (version 7.0, API level 24).

This documentation was introduced in Qt 5.9.

const QOperatingSystemVersion QOperatingSystemVersion::AndroidNougat_MR1

This variable holds a version corresponding to Android Nougat, maintenance release 1 (version 7.0, API level 25).

This documentation was introduced in Qt 5.9.

const QOperatingSystemVersion QOperatingSystemVersion::MacOSHighSierra

This variable holds a version corresponding to macOS High Sierra (version 10.13).

This documentation was introduced in Qt 5.9.1.

const QOperatingSystemVersion QOperatingSystemVersion::MacOSSierra

This variable holds a version corresponding to macOS Sierra (version 10.12).

This documentation was introduced in Qt 5.9.

const QOperatingSystemVersion QOperatingSystemVersion::OSXElCapitan

This variable holds a version corresponding to OS X El Capitan (version 10.11).

This documentation was introduced in Qt 5.9.

const QOperatingSystemVersion QOperatingSystemVersion::OSXMavericks

This variable holds a version corresponding to OS X Mavericks (version 10.9).

This documentation was introduced in Qt 5.9.

const QOperatingSystemVersion QOperatingSystemVersion::OSXYosemite

This variable holds a version corresponding to OS X Yosemite (version 10.10).

This documentation was introduced in Qt 5.9.

const QOperatingSystemVersion QOperatingSystemVersion::Windows7

This variable holds a version corresponding to Windows 7 (version 6.1).

This documentation was introduced in Qt 5.9.

const QOperatingSystemVersion QOperatingSystemVersion::Windows8

This variable holds a version corresponding to Windows 8 (version 6.2).

This documentation was introduced in Qt 5.9.

const QOperatingSystemVersion QOperatingSystemVersion::Windows10

This variable holds a version corresponding to Windows 10 (version 10.0).

This documentation was introduced in Qt 5.9.

const QOperatingSystemVersion QOperatingSystemVersion::Windows8_1

This variable holds a version corresponding to Windows 8.1 (version 6.3).

This documentation was introduced in Qt 5.9.

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