<template>
 <div class="app">
  <keep-alive>
   <router-view></router-view>
  </keep-alive>
 </div>
</template>

.....

  created: function () {
   console.log(1)
  },
  mounted: function () {
   console.log(2)
  },
  activated: function () {
   console.log(3)
  },
  deactivated: function () {
   console.log(4)
  }

.....

initData: function () {
    let _this = this;
    _this.fromLocation = JSON.parse(this.$route.query.fromLocation);
    _this.toLocation = JSON.parse(this.$route.query.toLocation);
    _this.activeIndex = parseInt(this.$route.params.activeIndex) || 0;
    _this.policyType = parseInt(this.$route.params.policyType) || 0;
   },

let swiperInstance = new Swiper('#swiper', {
  pagination: '.swiper-pagination',
  paginationClickable: false,
  initialSlide: activeIndex,
  onSlideChangeEnd: function (swiper) {
    let _activeIndex = swiper.activeIndex;
    _this.$route.params.activeIndex = _activeIndex;
    // $router我放到了window上方便调用
    window.$router.replace({
      name: _this.$route.name,
      params: _this.$route.params,
      query: _this.$route.query
    });
    // 根据activeIndex，在这里初始化下面显示的数据
    _this.transferDetail = _this.allData.plans[_activeIndex].segments;
    _this.clearBusDetailFoldState();
  }
});

export default {
  name: 'transferMap',
  data: function () {
    return {
      map: null,
    }
  },
  methods: {
    initData: function () {},
    searchTransfer: function (type) {},
    // 地图渲染 这个在transfer-map.html中使用
    renderTransferMap: function (transferMap) {}
  },
  mounted: function () {
    this.map = new AMap.Map("container", {
      showBuildingBlock: true,
      animateEnable: true,
      resizeEnable: true,
      zoom: 12 //地图显示的缩放级别
    });
  },
  activated: function () {
    let _this = this;
    _this.initData();
    // 设置title
    setDocumentTitle('换乘地图');
    _this.searchTransfer(_this.policyType).then(function (result) {
      // 数据加载完成
      // 换乘地图页面
      let transferMap = result.plans[_this.activeIndex];
      transferMap.origin = result.origin;
      transferMap.destination = result.destination;
      // 填数据
      _this.transferMap = transferMap;
      // 地图渲染
      _this.renderTransferMap(transferMap);
    });
  },
  deactivated: function () {
    // 清理地图之前的标记
    this.map.clearMap();
  },
}

document.title = '页面名称';

function setDocumentTitle(title) {
  "use strict";
  //以下代码可以解决以上问题，不依赖jq
  setTimeout(function () {
    //利用iframe的onload事件刷新页面
    document.title = title;
    var iframe = document.createElement('iframe');
    iframe.src = '/favicon.ico'; // 必须
    iframe.style.visibility = 'hidden';
    iframe.style.width = '1px';
    iframe.style.height = '1px';
    iframe.onload = function () {
      setTimeout(function () {
        document.body.removeChild(iframe);
      }, 0);
    };
    document.body.appendChild(iframe);
  }, 0);
}

function setDocumentTitle(title) {
  //需要jQuery
  var $body = $('body');
  document.title = title;
  // hack在微信等webview中无法修改document.title的情况
  var $iframe = $('<iframe src="/favicon.ico"></iframe>');
  $iframe.on('load', function () {
    setTimeout(function () {
      $iframe.off('load').remove();
    }, 0);
  }).appendTo($body);
}