vue移动端项目缓存问题实践记录

<template>
 <div id="app">
  <keep-alive>
   <router-view v-if="$route.meta.keepAlive"></router-view>
  </keep-alive>
  <router-view v-if="!$route.meta.keepAlive"></router-view>
 </div>
</template>

meta: {
  isUseCache: false,//不使用缓存
  keepAlive: true
}

beforeRouteLeave(to, from, next) {
 // 设置下一个路由的 meta
 if(to.path=='/B'){
  to.meta.isUseCache = false;
 }
 next();
},
activated(){
  if(!this.$route.meta.isUseCache){
    this.getData();
  }
}

beforeRouteLeave(to, from, next) {
 // 设置下一个路由的 meta
 if(to.path=='/A'){
  to.meta.isUseCache = true;
 }
 next();
},
activated(){
  if(!this.$route.meta.isUseCache){
    this.getData();
  }
} 

export const removeCatch = {
 beforeRouteLeave:function(to, from, next){
  if (from && from.meta.rank && to.meta.rank && from.meta.rank>to.meta.rank)
   {//此处判断是如果返回上一层，你可以根据自己的业务更改此处的判断逻辑，酌情决定是否摧毁本层缓存。
     if (this.$vnode && this.$vnode.data.keepAlive)
     {
       if (this.$vnode.parent && this.$vnode.parent.ponentInstance && this.$vnode.parent.ponentInstance.cache)
       {
         if (this.$vnode.ponentOptions)
         {
           var key = this.$vnode.key == null
                 ? this.$vnode.ponentOptions.Ctor.cid + (this.$vnode.ponentOptions.tag ? `::${this.$vnode.ponentOptions.tag}` : '')
                 : this.$vnode.key;
           var cache = this.$vnode.parent.ponentInstance.cache;
           var keys = this.$vnode.parent.ponentInstance.keys;
           if (cache[key])
           {
             if (keys.length) {
               var index = keys.indexOf(key);
               if (index > -1) {
                 keys.splice(index, 1);
               }
             }
             delete cache[key];
           }
         }
       }
     }
     this.$destroy();
   }
   next();
 }
};