GridView's Component won't keep my new properity after scrlling other place

[zenghsing]

I try to assign properity strFileMode to ImgFileCeil.

But I find the strFileMode will be reload when I scroll the menu to other place.

It means that the GridView's Component won't keep my new properity after scrolling other place....

Does it always reload compoment when I scroll the menu to other place?

How to keep the strFileMode in my gridview?

GridView {
            id:myGridview

            snapMode: GridView.SnapToRow
            property int numCellMargins: 0
            anchors.fill: parent
            anchors.margins: numCellMargins
            clip: true
            model:myModel
            cellWidth:(parent.width-numCellMargins*2)/numColumn // parent.width/3 ...this is error
            cellHeight:myGridview.height/numColumn//cellWidth*1.5
            delegate: myDelegate
        }
        Component {
            id: myDelegate

            ImgFileCeil{
                id:imgFileCeil
                Component.onCompleted: {
                    console.log(modelData+"-"+strMode+" : "+strDeleteName)
                    myDebug();
                }
                strTag: modelData
                width: myGridview.cellWidth
                height: myGridview.cellHeight
                strMode: strFileMode
                function setDeleteMode(posX,posY){
                    strFileMode="Delete"
                    setCheckBoxVisible()
                    console.log(modelData)
                    myGridviewReload(posX,posY)
                }
                function setMySelf(){
                    setCheckStation()
                }
            }
        }