主要核心点

完全自定义图层时，注意 onAdd、onRemove 这2个leaflet关键钩子方法的复写即可。

示例代码

class CustomLayer extends mars2d.layer.GraphicLayer {
   onAdd(map) {
    // this.isAutoEditing = this.options.isAutoEditing ?? true
    // this.isContinued = this.options.isContinued ?? false
    // this.isDblclickForDrawEnd = this.options.isDblclickForDrawEnd ?? true

    super.onAdd(map)
    this._map = map 
  }

  onRemove(map) { 
    // this.off(EventType.drawCreated, this._onDrawCreatedHandler, this)

    super.onRemove(map)
    delete this._map
  }

}
// 注册下，可以Map初始化时参数化创建
mars2d.LayerUtil.register("customLayer", CustomLayer)