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• 特性
• 详细描述

ItemLayer QML Type

A layer containing dynamic Qt Quick Ultralite items. 更多...

• 所有成员列表，包括继承成员

特性

• depth : enumeration
• platformId : int
• refreshInterval : int
• renderingHints : enumeration

详细描述

Defines a layer in which Qt Quick Ultralite items can be shown.

Using several item layers can help reduce memory usage by lowering bit depths or using smaller item layers instead of a single item layer. The later is used when there are significant gaps in the UI without any content.

It's also possible to use the refreshInterval property to reduce the frame rate of certain layers. This results in lower CPU and GPU utilization and ensures that animations in higher priority layers stay smooth.

用法范例：

ItemLayer {
    width: 400
    height: 400
    depth: ItemLayer.Bpp16
    Rectangle {
        anchors.fill: parent
        color: "#3d464d"
    }
    Image {
        anchors.centerIn: parent
        source: "qrc:/images/hello.png"
    }
}
						

注意： This type is specific to Qt Quick Ultralite. See also the compatibility 页面。

另请参阅 应用程序 , Screen , ImageLayer , SpriteLayer ，和 使用硬件层改善性能 .

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