The Qt Qml module provides the definition and implementation of various convenience types that can be used with the QML language. This includes elementary QML types, which can provide the basis for further extensions to the QML language. The QtObject and Component object types are non-visual and provide building-blocks for extensions to QML.
类型提供通过
QtQml
module are only available in a QML document if that document imports the
QtQml
namespace (or if the document imports the
QtQuick
namespace, as noted below).
要使用模块，import
QtQml
模块采用以下语句：
import QtQml
很多客户端将从不需要使用
QtQml
module directly, but will rather import it indirectly via the
QtQuick
模块如下：
import QtQuick
见 Qt Quick module documentation for more information about its types.
The QML types for creating lists and models, such as ListModel and ListElement , belong to a submodule, QtQml.Models .
The WorkerScript QML type belongs to the submodule QtQml.WorkerScript .
Both,
QtQml.Models
and
QtQml.WorkerScript
are automatically imported whenever you import
QtQml
. All their types are then available, too.
The
Qt Quick
模块自动导入
QtQml
and, transitively,
QtQml.Models
and
QtQml.WorkerScript
, making all their types available whenever you import
QtQuick
.
下列 QML 值类型 有提供：
| 具有 X 和 Y 属性的值 | |
| 具有 X、Y、宽度及高度属性的值 | |
| 具有宽度和高度属性的值 |
下列 QML 序列类型 are provided by the Qt QML module in addition to the ones registered with each value type and object type:
std::vector<QString>
std::vector<QUrl>
std::vector<bool>
std::vector<int>
std::vector<float>
std::vector<double>
下列 QML 对象类型 有提供：
| 使能够创建任意特性绑定 | |
| 封装 QML 组件定义 | |
| 描述信号的一般化连接 | |
| 提供日期函数 | |
| 提供特定区域设置的特性和格式化数据 | |
| 定义 QML 日志类别 | |
| 提供表示数字值的对象 | |
| 提供带有有用 Qt 枚举和函数的全局对象 | |
| 基本 QML 类型 | |
| 按指定间隔触发处理程序 | |
| 用于向服务器发送请求的对象 |