vue-draggable-resizable可拖拽放大缩小，删除的解决方法

<vue-draggable-resizable
v-for="(item,index) in pictureList"
:parent="true"
:w="item.width"
:h="item.height"
:key="index"
:y="item.y"
@activated="onActivated(index)">
onActivated(index){
let that = this
document.onkeydown = function(event){
if(event.code=="Delete"){
that.pictureList.splice(index,1)
}
}
}