what？iView的DropDown沒有element的split-button？提issure？等不及了，自己實現一個

<template>
  <span>
    <Button :type="type" @click="$emit('click')" :size="size" :icon="icon" class="btnLeft">
      <slot></slot>
    </Button>
    <Dropdown @on-click="command" :trigger="trigger">
      <Button :type="type" icon="ios-arrow-down" :size="size" class="btnDown"/>
      <template slot="list">
        <slot name="list"></slot>
      </template>
    </Dropdown>
  </span>
</template>

<script>
export default {
  props: {
    /**
     * @description 按鈕類型，可選值為 default、primary、dashed、text、info、success、warning、error
     */
    type: {
      type: String,
      default: "primary"
    },
    /**
     * @description 按鈕大小，可選值為large、small、default或者不設置
     */
    size: String,
    /**
     * @description 觸發方式，可選值為 hover（懸停）click（點擊）contextMenu（右鍵），默認是hover
     */
    trigger: String,
    /**
     * @description 設置按鈕的圖標類型
     */
    icon: String
  },
  methods: {
    command: function(key) {
      this.$emit("command", key);
    }
  }
};
</script>
<style>
.btnDown {
  margin-left: 0 !important;
  padding-left: 5px !important;
  padding-right: 5px !important;
  border-top-left-radius: 0 !important;
  border-bottom-left-radius: 0 !important;
}
.btnLeft {
  margin-right: 0 !important;
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
}
</style>

      <ButtonDrop @command="setStatus" @click="setPage(1)" size="large" icon="md-create">
        編輯
        <DropdownMenu v-once slot="list">
          <DropdownItem :name="-1">全部</DropdownItem>
          <DropdownItem v-for="t in statuss" :key="t.k" :name="t.k">{{t.v}}</DropdownItem>
        </DropdownMenu>
      </ButtonDrop>