总体上，qml的数据类型分为基本数据类型和对象类型，基本类型用于表示简单的值，其中一部分由qml语言提供，另一部分来自qml模块。
qml对象类型指类的实例，又分为qml对象类型和javascript对象，qml引擎支持几乎所有的javascript标准对象
一、基本数据类型
1.1 qml提供的基本数据类型
| Binary true/false value | |
| Number with a decimal point, stored in double precision | |
| Named enumeration value | |
| Whole number, e.g. 0, 10, or -20 | |
| List of QML objects | |
| Number with a decimal point | |
| Free form text string | |
| Resource locator | |
| Generic property type |
1.2 qml模块提供的基本类型
| Date value | |
| Value with x and y attributes | |
| Value with x, y, width and height attributes | |
| Value with width and height attributes | |
| ARGB color value. The type refers to an ARGB color value. It can be specified in a number of ways: | |
| Font value with the properties of QFont. The type refers to a font value with the properties of QFont | |
| A matrix4x4 type is a 4-row and 4-column matrix | |
| A quaternion type has scalar, x, y, and z attributes | |
| A vector2d type has x and y attributes | |
| Value with x, y, and z attributes | |
| A vector4d type has x, y, z and w attributes |
二、对象类型
2.1 qml对象类型
| Provides date functions | |
| Object provides represents a number value | |
| Object represents a string value | |
| Encapsulates a QML component definition | |
| Provides a global object with useful enums and functions from Qt | |
| A basic QML type | |
| Provides locale specific properties and formatted data | |
| Enables the arbitrary creation of property bindings | |
| Describes generalized connections to signals | |
| Dynamically creates objects | |
| Triggers a handler at a specified interval |
2.2 javascript对象