Vue keepAlive页面强制刷新方式
作者:milugloomy
keepAlive页面强制刷新
需求
现在有一个需求,要求不刷新浏览器,但要刷新路由中的组件
方案
将需要keepAlive的页面name加入到keep-live的include中。
Vue的transition组件,有一个after-enter钩子事件,待子组件插入完毕调用,正好适合这个场景,在这个钩子中,将当前组件添加到keep-live的include中。
在刷新时,从keepAliveArr中移除当前组件的name,然后利用v-if删除router-view组件,在nextTick事件后将router-view添加回来,实现组件的刷新
代码
template
<transition @after-enter="afterRouterChange"> <keep-alive :include="keepAliveArr"> <router-view v-if="refreshControl" ref="child"/> </keep-alive> </transition> <button @click="refreshChild"></button>
script
export default {
name: 'index',
data () {
return {
keepAliveArr: [],
refreshControl: true
}
},
methods: {
refreshChild () {
// 先移除,再加载,强制刷新子页面
const name = this.$refs.child.$options.name
this.keepAliveArr.splice(this.keepAliveArr.indexOf(name), 1)
this.refreshControl = false
this.$nextTick(() => this.refreshControl = true)
},
afterRouterChange () {
// 记录子组件name,用于keepalive
const childName = this.$refs.child.$options.name
this.pageTabList[this.pageTabIndex].name = childName
if (!this.keepAliveArr.includes(childName)) {
this.keepAliveArr.push(childName)
}
}
}
}keep-alive缓存页面刷新
vue文件keep-alive缓存页面刷新
概述:
vue开发项目时,需要缓存多个页面的情况
使用场景:
例如:现有4个页面,页面1,页面2,页面3,页面4
要求:
- 1、从1-2-3-4依次跳转时,每次都刷新页面,不进行缓存;
- 2、从4-3-2-1依次返回时,页面不刷新,依次取缓存页面;
总结:外到内都需要刷新,内到外皆获取缓存页面;
实现方式:keep-alive、vuex、路由钩子函数beforeRouteEnter、beforeRouteLeave
1.vuex部分
import Vue from 'vue';
import Vuex from 'vuex';
let storeModules = {};
Vue.use(Vuex);
export default new Vuex.Store({
state: {
keepAlive: []
},
getters: {},
mutations: {
change_keepalive: (state, keepAlive) => {
state.keepAlive = keepAlive;
}
},
actions: {},
modules: storeModules
});2.app.vue部分
<template>
<div>
<keep-alive :include="$store.state.keepAlive">
<router-view></router-view>
</keep-alive>
</div>
</template>
<script>
export default {};
</script>使用<keep-alive>的include属性,来实现动态的组件缓存。
先说一下include属性,它的值可以是:字符串,正则表达式,数组
首先我们需要知道keep-alive可以根据include中的值来匹配当前路由对应组件的name属性,来判断这个路由中的组件是否需要缓存。
3.页面1内部写法
methods: {
// 跳转
goLink(){
this.$store.commit('change_keepalive', ['页面1','页面2','页面3'])
this.$router.push({
path:'/页面2',
})
}
},
beforeRouteEnter (to, from, next) {
next(vm => {
vm.$store.commit('change_keepalive', ['页面1'])
})
}4.页面2内部写法
beforeRouteEnter (to, from, next) {
next(vm => {
if (from.path.indexOf('页面3') > -1) {
vm.$store.commit('change_keepalive', ['页面1','页面2'])
}
})
},
beforeRouteLeave (to, from, next) {
if (to.path.indexOf('页面3') > -1) {
this.$store.commit('change_keepalive', ['页面1','页面2', '页面3'])
} else if (to.path.indexOf('页面1')>-1) {
this.$store.commit('change_keepalive', ['页面1'])
}
next()
}5.页面3内部写法
beforeRouteEnter (to, from, next) {
next(vm => {
if (from.path.indexOf('页面4') > -1) {
vm.$store.commit('change_keepalive', ['页面1','页面2', '页面3'])
}
})
},
beforeRouteLeave (to, from, next) {
if (to.path.indexOf('页面4') > -1) {
this.$store.commit('change_keepalive', ['页面1','页面2', '页面3'])
} else if (to.path.indexOf('页面2') > -1) {
this.$store.commit('change_keepalive', ['页面1','页面2'])
}
next()
}6.页面4
不需要缓存则无需添加任何东西,正常书写即可,如需添加设置缓存,则按照上方更改添加配置即可。
注:
其中from.path.indexOf('页面x')中页面x为router的path属性
this.$store.commit('change_keepalive', ['页面1','页面2'])中的页面x为组件的name属性(不是路由的name,是组件的name)
<script>
export default {
name:'index',//组件name
components: {},
props: {},
data() {
return {};
},
computed: {},
watch: {},
created() {},
mounted() {},
methods: {}
}
</script>```总结
以上为个人经验,希望能给大家一个参考,也希望大家多多支持脚本之家。
