vue2.0 实现页面导航提示引导的方法

  <Modal v-if="modalOFF === 1">
  <p>这里是对话框一</p>
  <button @click="modalOFF = 2"></button>
  </Modal>
  <Modal v-if="modalOFF === 2">
  <p>这里是对话框二</p>
  <button @click="modalOFF = 3"></button>
  </Modal>
  <Modal v-if="modalOFF === 3">
  <p>这里是对话框二</p>
  <button @click="modalOFF = null"></button>
  </Modal>

让谁先显示，就在data中定义modalOFF的属性值。默认是
 modalOFF: 1,