设置图层顺序

function SetLayerIndex(layer,index,type) {
  var that=this;
  //中间数据
  let middle=null;
  let middle_index=null;
  /*调试代码
  * 1、添加灰度图层的时候记得加一句灰度图.setZIndex(that.GrapImageLayerList.length)
  * */
  // console.log("图层信息",layer)
  // console.log("图层信息2",that.GrapImageLayerList)
  // console.log("图层信息3",layer.id)
  // var layer1=GetLayer(that.NewMap,layer.id);
  // console.log("图层信息4",layer1)
  // layer1.setZIndex(-30)
  // console.log("图层信息5",layer1.getZIndex())
  /*调试代码end*/


  if(type==1){
  //  上移
    if(index>0){
      middle_index=index-1;

      middle=that.GrapImageLayerList[middle_index];
      that.GrapImageLayerList[middle_index]=layer;
      that.GrapImageLayerList[index]=middle;

      var layer1=GetLayer(that.NewMap,layer.id);
      var layer2=GetLayer(that.NewMap,middle.id);

      var zIndex1=layer1.getZIndex()
      var zIndex2=layer2.getZIndex()
      layer1.setZIndex(zIndex2)
      layer2.setZIndex(zIndex1)
    }

  }else{
    if(index<(that.GrapImageLayerList.length-1)){
      middle_index=index+1;
      middle=that.GrapImageLayerList[middle_index];
      that.GrapImageLayerList[middle_index]=layer;
      that.GrapImageLayerList[index]=middle;

      var layer1=GetLayer(that.NewMap,layer.id);
      var layer2=GetLayer(that.NewMap,middle.id);

      var zIndex1=layer1.getZIndex()
      var zIndex2=layer2.getZIndex()
      layer1.setZIndex(zIndex2)
      layer2.setZIndex(zIndex1)
    }
  }
}