QML Applications

什么是QML
Qt 5.6.0 Reference Documentation
Contents
What is QML?
What is Qt Quick?
QML User Interfaces
Buttons, Menus, and other Controls
Special Effects
Viewing Web Content in QML Applications
Sensors, Gestures, and Touch Interfaces
Multimedia Content
Mobile Devices
Code Samples and Demos
Advanced Application Development Topics
Other QML Modules
Related Topics
QML Applications
QML is a declarative language that allows user interfaces to be described in terms of their visual components and how they interact and relate with one another. It is a highly readable language that was designed to enable components to be interconnected in a dynamic manner, and it allows components to be easily reused and customized within a user interface. Using the QtQuick module, designers and developers can easily build fluid animated user interfaces in QML, and have the option of connecting these user interfaces to any back-end C++ libraries.
What is QML?
QML is a user interface specification and programming language. It allows developers and designers alike to create highly performant, fluidly animated and visually appealing applications. QML offers a highly readable, declarative, JSON-like syntax with support for imperative JavaScript expressions combined with dynamic property bindings.
The QML language and engine infrastructure is provided by the Qt QML module. For in-depth information about the QML language, please see the Qt QML module documentation.
The following pages contain more information about QML:
First Steps with QML - begin using QML with these examples
Creating Qt Quick Projects in Qt Creator
The QML Reference - reference about the QML constructs and features
QML Coding Conventions
Glossary of QML Terms
What is Qt Quick?
Qt Quick is the standard library of types and functionality for QML. It includes visual types, interactive types, animations, models and views, particle effects and shader effects. A QML application developer can get access to all of that functionality with a single import statement.
The QtQuick QML library is provided by the Qt Quick module. For in-depth information about the various QML types and other functionality provided by Qt Quick, please see the Qt Quick module documentation.
QML User Interfaces
For creating or customizing graphical user interfaces, Qt Quick adds visual types, animation types, and other QML types in addition to the standard QML types from Qt QML. Qt Quick Designer is integrated within Qt Creator and supports QtQuick 2 from Qt Creator version 2.7 and onwards.
Visual types in QML
Responding to User Input in QML
Animations in QML
Displaying Text in QML
Layouts in QML
Style and Theme Support
Integrating JavaScript in QML
Scalability
Buttons, Menus, and other Controls
For a set of basic UI controls, the Qt Quick Controls module implements several controls such as buttons, menus, and views. These controls mimic the native behavior found in different platforms such as Windows, OS X, and Linux.
Qt Quick Controls Overview
Styles
Dialogs
Layouts
Extras
Special Effects
Several Qt modules provide types for creating special effects in applications. Their respective pages contain more information about specific uses.
Particle Effects
Graphical Effects - for creating image composition effects.
Viewing Web Content in QML Applications
The QML types, WebEngineView and WebView, render and display dynamic web content. The only difference between the two is that the later uses a native web view if available. Both these types can load a URL or an HTML string. To read more about them and view code samples, see Qt WebEngine and Qt WebView.
Sensors, Gestures, and Touch Interfaces
The Qt Sensors module allows applications to read information from sensors such as accelerometers and tilt sensors. There is a common QML API for different platforms and can be extended in C++.
Qt Sensors QML Types
Qt Sensors Examples
Compatibility Map - lists support level for different mobile platforms
Multimedia Content
The Qt Multimedia module enables applications to handle various media content with a convenient set of QML types. These QML types can be extended in C++.
Multimedia
Audio Overview
Video Overview
Camera Overview
Radio Overview
Qt Audio Engine - for 3D positional audio playback and content management.
Mobile Devices
Several Qt modules provide QML APIs for networked and mobile devices. The QML types provide access to the Bluetooth, Near-Field Communications (NFC), and GPS-enabled devices.
Qt Positioning
Qt Location
Qt Bluetooth
Qt NFC
For more information, visit the Networking and Connectivity and Mobile APIs pages.
Code Samples and Demos
To learn more about uses of QML code, there are several code samples which show how QML types are used. In addition, there are several demos which show how QML code is used in applications.
Getting Started Programming with Qt Quick - a tutorial showing the creation of a simple QML text editor.
Qt Quick Examples and Tutorials
Advanced Application Development Topics
Deploying QML Applications
Performance Considerations and Suggestions
Internationalization and Localization
Testing and Debugging
Prototyping with qmlscene
Debugging QML Applications
Qt Quick Test: QML Unit Testing Framework
Other QML Modules
Qt Quick only provides basic visual types and much of Qt’s functionality is exposed to QML through other modules. If you require the functionality of those modules, you should browse their QML documentation.
The All QML APIs by Module contains a list of all QML modules in Qt 5.
Related Topics
Porting QML Applications to Qt 5