有没有办法在qml中使用图像占位符？

Image {
    source: "image.jpg" // 实际图像的路径
    placeholder: Image {
        source: "placeholder.jpg" // 占位符图像的路径
    }
}

Image {
    source: "image.jpg" // 实际图像的路径
    placeholder: Image {
        source: "custom_placeholder.jpg" // 自定义占位符图像的路径
    }
}

Image {
    id: image
    source: "image.jpg" // 实际图像的路径

    states: [
        State {
            name: "loading"
            when: image.status === Image.Loading
            PropertyChanges { target: placeholder; visible: true }
        }
    ]

    transitions: Transition {
        from: ""; to: "loading"
        reversible: true
        PropertyAnimation { target: placeholder; property: "opacity"; duration: 200 }
    }

    placeholder: Image {
        source: "placeholder.jpg" // 占位符图像的路径
        visible: false
    }
}