Qt-3D:动画可以使用放松吗?

"easing" does not have members 对于行 easing.type :Easing.InQuad 代码如下:

            SequentialAnimation on y {
                loops: Animation.Infinite
                NumberAnimation {
                    duration: 3000
                    to: -150
                    from: 150
                    easing.type :Easing.InQuad
                }
                NumberAnimation {
                    duration: 3000
                    to: 150
                    from: -150
                    easing.type :Easing.OutQuad
                }
            }