refs使用

1.页面生命周期

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_mounted

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所以 onshow 去使用 refs 有概率 会拿不到

2. 解决方案
   包一层 nexttrick

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 //
  onShow() {
    console.log('my_page_onShow');
    console.log('my_page_onShow_refs:', this.$refs.activityAd);
    this.$nextTick(() => {
      console.log('my_page_onShow_nextTick');
      console.log('my_page_onShow_nextTick_refs:', this.$refs.activityAd);
    });
  },
  onHide() {
    console.log('my_page_onHide');
    console.log('my_page_onHide_refs:', this.$refs.activityAd);
    this.$nextTick(() => {
      console.log('my_page_onHide_nextTick');
      console.log('my_page_onHide_nextTick_refs:', this.$refs.activityAd);
    });
  },
  created() {
    console.log('my_page_created');
    console.log('my_page_created_refs:', this.$refs.activityAd);
    this.$nextTick(() => {
      console.log('my_page_created_nextTick');
      console.log('my_page_created_nextTick_refs:', this.$refs.activityAd);
    });
  },
  mounted() {
    console.log('my_page_mounted');
    console.log('my_page_mounted_refs:', this.$refs.activityAd);
    this.$nextTick(() => {
      console.log('my_page_mounted_nextTick');
      console.log('my_page_mounted_nextTick_refs:', this.$refs.activityAd);
    });
  },

image.png