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  2. Qt 6.7.2
  3. Qt 6 的新功能
  4. Qt 6.7 的新功能

Qt 6.7 的新功能

Qt 6.7 的新特征

Qt Core 模块

  • 添加 QSpan ，C++20 std::span 的 Qt 重实现。
  • 添加 Qt::strong_ordering , Qt::weak_ordering ，和 Qt::partial_ordering classes that are a C++17-compatible implementation of std::*_ordering 类。
  • Added helper macros to conveniently implement relational operators in Qt classes. These macros provide operator<=>() in C++20 builds, and fall back to all six relational operators in C++17 builds.
  • 将这些帮手宏应用到 QDate , QTime , QDateTime , QTimeZone ，和 qfloat16 类。
  • 添加新类 QAtomicScopedValueRollback .
  • 添加 Qt::Key_micro to eventually replace the misnamed Key_mu: it is the micro sign U+00B5, not the Greek letter mu, U+03BC or U+039C.
  • QLocale 's name(), bcp47Name() and uiLanguages() now let callers specify the separator to use between tags in names.
  • QLocale now localizes (in so far as it can) the time zone parts of formatted datetimes.
  • Date (and datetime) parsing of two-digit years now allows the caller to control the century within which those years are selected.
  • QCalendar now has a matchCenturyToWeekday(), to support the parsing of two-digit years.
  • QDateTime now accepts TransitionResolution parameters, allowing callers control over how time-zone transitions are resolved. The default resolution of a datetime in a gap is now valid but its time() and possibly date() now match what toMSecsSinceEpoch() reports, rather than what was asked for.

Qt Graphs 模块

  • Data API for 3D graphs does not require creating every data item into heap memory.
  • Render to image functionality added for Bars3D , Scatter3D ，和 Surface3D 图形。
  • Some redundant classes were removed and the necessary functionality moved elsewhere.
  • Enums were made scoped.
  • A number of other architectural and functional changes.
  • Performance and visual quality improvements.
  • Technology Preview added for 2D graphs, which contains initial support for bar, line and scatter graphs.

Qt GRPC 模块

注意： Qt GRPC 模块在技术预览。

Qt GUI 模块

Qt Multimedia 模块

  • 在 Windows，FFmpeg 多媒体后端现在与 FFmpeg 动态链接。FFmpeg 预构建二进制的提供，是透过在线安装程序。使用 FFmpeg 后端的 Windows 应用程序，现在必须使用 windeployqt 将 FFmpeg 二进制捆绑作为其安装程序的一部分。
  • 新的 MediaPlayer::autoPlay and Video::autoPlay 特性可以用于自动开始回放，当有设置媒体源时。
  • The QCameraDevice 拥有新的 correctionAngle 特性。此特性表示所需的旋转角度，以补偿相机比较物理相机其本机取向的旋转。

Qt Network 模块

Qt OPC UA 模块

Qt Protobuf 模块

  • Added the new serializer that implements JSON serialization and deserialization functionality for QProtobufMessage -based classes.
  • Added support of 'optional' fields in the Qt Protobuf generator. If the message field is marked as 'optional', it gets clear<fieldName> and has<fieldName> methods in addition to the regular field one.
  • Enum fields generated by the Qt Protobuf generator now preserve the case of first letter. Previosly generator capitalized the generated enum field names.

注意： The Qt Protobuf Module is under Technology Preview.

Qt QML 模块

  • Added new features to QML Language Server: formatting, semantic and code snippet completions, renaming usages, and setting file generation in CMake via QT_QML_GENERATE_QMLLS_INI.
  • The translation context of a QML file can be set via pragma Translator
  • 现在可以声明 QML_CONSTRUCTIBLE_VALUE and QML_STRUCTURED_VALUE on value types and construct objects of such types from QML. In fact you could already since Qt 6.5, but now it's officially supported.

Qt Quick 编译器

  • Bindings and functions that write properties of value types can now be compiled to C++
  • Optional chaining can now be compiled to C++
  • for..in iteration can now be compiled to C++

Qt Quick 模块

Qt Quick Controls 模块

Qt Quick Shapes 模块

  • The Curve Renderer and the associated property preferredRendererType are now officially supported and are no longer considered experimental.
  • 添加 pathHints property for characterizing shapes. This may be used by the renderer to optimize processing and rendering the paths.
  • Shapes now have an implicit size based on the bounding rect of the shape, and will be appropriately positioned in layouts. The properties fillMode , horizontalAlignment and verticalAlignment were added to modify how the shape behaves when the item is given an explicit size which differs from the implicit size.
  • 工具 svgtoqml was added as a technology preview. This is a tool which can be used to convert an SVG file into QML code. It is currently considered experimental and has support for a subset of what Qt SVG supports.

Qt Quick Timeline 模块

  • The QtQuick .Timeline.BlendTrees sub-module adds new APIs to enable blending multiple timeline animations.

Qt Quick 3D 模块

Qt Quick 3D Physics 模块

Qt Serial Bus 模块

  • 添加方法到 QCanDbcFileParser , which enables DBC file parsing with an encoding other than UTF-8.

Qt Sql 模块

  • The deprecated <qsql.h> header got removed. Use <qtsqlglobal.h> instead.

Qt WebEngine 模块

Qt Widgets 模块

  • 添加 QRhiWidget class (under technology preview) for rendering 3D graphics via any hardware accelerated graphics API supported by Qt's rendering hardware interface, i.e. OpenGL, Vulkan, Direct3D, or Metal.
  • QCheckBox got a new signal checkStateChanged that emits the new check state as a type safe Qt::CheckState 枚举值。
  • QDateTimeEdit got a new timeZone property
  • On Systems running Windows 11 and above the new Windows 11 widget style is used by default. This style supports Windows dark mode.

Qt SVG 模块

  • Added support for some elements from SVG 1.1 standard. The elements are Mask, Symbol, Marker, Pattern, Filter, and Filter Primitives (feMerge, feColorMatrix, feGaussianBlur, feOffset, feComposite, feFlood)
  • 添加 QtSvg::Options flag to enable or disable rendering of the new elements.
  • Added setters and getters for the QtSvg::Options for QSvgRenderer and QSvgWidget . The new features are enabled by default.

工具

Qt Designer

  • Qt Designer now writes fully qualified enumeration values to the .ui files in order to support scoped enumerations and Qt for Python. Support for reading these values has been back-ported to 6.6.1 and 6.5.4.

平台的变化

桌面平台

Windows

macOS

  • macOS 14 is now a supported build and target platform.

Linux 中的 Wayland 客户端

WebAssembly

  • Added drop support (drag-and-drop). Qt will now send drop events when the user drops content on application windows.
  • OpenGL ES 3 / WebGL2 is now default, with fallback to OpenGL ES2 / WebGL 1.
  • Emscripten version updated to 3.1.50

移动平台

Android

  • Re-factored the Android plugin Java code which, consists of:
    • Simplifying the architecture and the relation between the various classes (for example, between QtActivity, QtActivityLoader, and QtActivityDelegate).
    • Moving the QtLoader classes away from the public bindings package.
    • Removed usage of reflection.
  • Added preliminary support for child windows for Android to be consistent with Qt and its other QPAs. As a result of that, QScreen::grabWindow () is temporarily unsupported for now.
  • Set Android 14 as the maximum supported platform version, and the default platform SDK and target levels to API 34.
  • Set the supported Android NDK version to r26b (26.1.10909125) and JDK to 17.
  • Aligned the Mobile category examples with iOS.
  • 添加 QNativeInterface::QAndroidScreen that provides access to the Android Display id of a QScreen .
  • Added support for using ndk-stack with androidtestrunner to pretty print test crash reports.
  • Added CMake variable QT_ANDROID_DEPLOYMENT_TYPE to explicitly set the deployment type for the Android package.
  • Overall re-write and update for Qt Android platform documentation.
  • Introduced features to use the powers of Qt in Android projects:

iOS

  • iOS 17 is now a supported target platform.

嵌入式平台

Boot to Qt

  • Support was added for Yocto 4.3 (Nanbield).
  • Support added for ARM Linux development hosts.
  • Squish support included in the target images.
  • The 目标硬件的支持级别 was updated with new supported boards for Tier 3:
    • Amazon AWS EC2 ARM64
    • NVIDIA Jetson AGX Orin Developer Kit
    • NXP i.MX8M Nano LPDDR4 EVK (replaces DDR4 EVK variant)
    • Qualcomm Robotics RB5 Development Kit
    • TI SK-AM69

VxWorks

  • Added VxWorks 23.09 support as Technology Preview.

构建系统变化

  • Qt C++ headers now feature metadata for the IWYU 工具。
  • CMake: You can now tweak the arguments for *deployqt tools in qt_generate_deploy_app_script(), qt_deploy_runtime_dependencies() by setting the DEPLOY_TOOL_OPTIONS.
  • CMake: qt_add_library() now considers the value of the BUILD_SHARED_LIBS variable. If the variable is defined, it has higher priority than the library type detecting logic in qt_add_library() when adding the library targets.
  • CMake: qt_standard_project_setup() allows you now to set the native UI language of your application, as well as the languages the UI is translated to. This is then picked up by qt_add_translations() calls to generate .ts and .qm files that match the given languages, generating a 'plural-only' .ts file for the native language.
  • CMake: You can now pass multiple targets to qt_add_translations() to extract translations from. Alternatively, you can let qt_add_translations() collect all targets of a project (done via the new qt_collect_translation_source_targets() function), with the option to opt out of undesired targets on directory or target level.
  • CMake: qt_add_translations() has been moved out of technical preview.

WebOS

  • Qt 6.7 has been verified to work with LG webOS OSE 2.25.0 ( Qt for webOS ).

API 变化列表

这些页面包含 Qt 6.7 的 API 变化概述：

内容