要导入 QML 类型到应用程序中，使用以下 import 语句在 .qml 文件中：
import QtQuick.Timeline
| A keyframe | |
| A keyframe group | |
| A timeline | |
| A number animation attached to a timeline |
The BlendTrees submodule provides QML types for blending multiple TimelineAnimation s together, creating new dynamic animations.
要导入 QML 类型到应用程序中，使用以下 import 语句在 .qml 文件中：
import QtQuick.Timeline.BlendTrees
| A blend tree node that blends between two animation sources | |
| Base class for all blend tree nodes | |
| A blend tree source node that plays a timeline animation |
