vue实现移动端下拉刷新，更新幻灯片效果

1、修改loading组件，增加设置文字的方法

src/components/loading/index.vue

<template>
    <div class="mine-loading" :class="{'me-loading-inline':inline}">
        <span class="mine-loading-indicator">
            <img src="./loading.gif">
        </span>
        <span class="mine-loading-text" v-if="loadingText">{{loadingText}}</span>
    </div>
</template>

<script>
export default {
   name:"MeLoading",props:{//过滤器
        inline:{
            type:Boolean,default:false
        }
   },data(){
       return{
           loadingText:"加载中..."
       }
   },methods:{
       setText(text){
           this.loadingText=text;
       }
   },watch:{
       text(text){
           text;
       }
   }
}
</script>

<style lang="scss" scoped>

    .mine-loading{
        width:100%;
        height:100%;
        display: flex;
        justify-content: center;
        align-items: center;
        flex-direction: column;

        图文左右排列时
        &.me-loading-inline{
            flex-direction: row;
           
            .mine-loading-indicator ~ .mine-loading-text{
                margin-top:0px;
                margin-left:7px;
            }
        }

         存在.mine-loading-indicator和.mine-loading-text时
        .mine-loading-indicator ~ .mine-loading-text{
            margin-top:7px;
        }
    }
</style>

 

2、修改scroll组件，给下拉的各种状态添加事件

scr/components/scroll/index.vue

<template>
    <!-- 通过ref可以获取到dom对象 -->
    <swiper class="swiper" :options="swiperOption" ref="swiper">
      <div class="mine-scroll-pull-down">
          <me-loading :text="pullDownText" inline ref="pullDownLoading" />
      </div>
      <swiper-slide>
          <!-- 所有内容放在插槽里 -->
          <slot></slot>
      </swiper-slide>
      <div class="swiper-scrollbar" slot="scrollbar"></div>
  </swiper>
</template>

<script>
  import { Swiper,SwiperSlide } from 'vue-awesome-swiper';
  import 'swiper/css/swiper.css';
  import MeLoading from 'components/loading';

  export  {
    name: 'Scrollbar' {
        pulling:false,是否正在下拉中
        pullDownText:'向下拉动会重新加载幻灯片哦'true
          },direction:'vertical'下拉刷新时触发的事件
            sliderMove:this.sliderMove,touchEnd:.touchEnd
          }
        }
      }
    },props:{
      recommends:{
        type:[Array,Object],1)">(){
           [];
        }
      }
    },watch:{当recommends值发生改变时
      recommends(){
        this.$refs.swiper && this.$refs.swiper.$swiper.update();更新滚动条长度
      }
    },methods:{
      sliderMove(){
        if(this.pulling) return;正在下拉中，则不重复下拉

        const swiper=.$refs.swiper.$swiper;
        console.log(swiper.translate);//打印出滚动条滚动的距离

        if(swiper.translate>0){向下拉
          if(swiper.translate>100){超出规定的高度
            this.$refs.pullDownLoading.setText("开始下拉...");
          }else{
            this.$refs.pullDownLoading.setText("向下拉动会重新加载幻灯片哦");
          }
        }
      },touchEnd(){
        this.pulling=true;正在下拉中

        if(swiper.translate>100){
          swiper.allowTouchMove=false;禁止触摸
          swiper.setTransition(swiper.params.speed);设置初始速度
          swiper.setTranslate(100);移动到设定的位置（拖动过度时回到设置的位置）
          swiper.params.virtualTranslate=定住不给回弹
          this.$refs.pullDownLoading.setText("正在下拉中...");设置正在刷新中的文字
          this.$emit("pull-down",1)">this.pullDownEnd);触发消息，传递结束下拉的函数
        }
      },pullDownEnd(){
        const swiper=.$refs.swiper.$swiper;

        this.$refs.pullDownLoading.setText("下拉结束");设置加载结束后的文字
        swiper.allowTouchMove=可以触摸
        swiper.setTransition(swiper.params.speed);设置初始速度           
        swiper.params.virtualTranslate=可以回弹
        swiper.setTranslate(0);移动到最初的位置

        下拉结束
      }
    }
  }
</script>

<style lang="scss" scoped>
    .swiper-container{
        width:100%;
        overflow:hidden;
    }
    .swiper-wrapper{
        height:auto;
    }
    .swiper-slide{
        height:auto;
    }
    .mine-scroll-pull-down{
        position:absolute;
        left:0;
        bottom:100%;
        width:100%;
        height:80px;
    }
</style>

 

3、在获取轮播图数据的文件中，新增一句证明轮播图已被刷新

 

 

4、修改slider组件，接收到scroll发来的消息后，重新加载轮播图

src/components/slider/index.vue

<template>
  <div class="slider-wrap">
    <me-loading v-if="!sliders.length" />
    <swiper ref="mySwiper" :options="swiperOptions" v-else>
      <swiper-slide v-for="(slider,index) in sliders" :key="index">
          <a :href="slider.linkUrl">
              <img :src="slider.picUrl">
          </a>
      </swiper-slide>
      <div class="swiper-pagination" slot="pagination"></div>
      <div class="swiper-button-prev" slot="button-prev"></div>
      <div class="swiper-button-next" slot="button-next"></div>
    </swiper>
  </div>
</template>

<script>
import { Swiper,1)">;
import 'swiper/css/swiper.css';
import { getSliders } from 'api/slider';
import MeLoading from 'components/loading';
 
export  {
    name:"Slider" {
        sliders:[],swiperOptions: {
          spaceBetween: 302500'.swiper-button-prev'一般在created里获取远程数据
        .getSliders();    
    },updated() {
      this.$refs.mySwiper.$swiper.slideTo(3,1000,1)">);
    },methods:{
        getSliders(){
            return getSliders().then(data=>{
                console.log(data);
                this.sliders=data;              
            });
        }
    },watch:{
      sliders(sliders){观察幻灯片数量，当只有一张时不进行轮播
        this.swiperOptions.loop=sliders.length > 1 ? true : 
      }
    }
  }
</script>

<style lang="scss" scoped>;
        height:180px;
    }
    .slider-wrap{
      height:180px;
    }
    .swiper-slide a{
        display:block;
        width:100%;

        & img{
            width:100%;
            height:100%;
        }
    }
</style>

 

5、修改首页

src/pages/home/index.vue

<template>
    <div class="home">
        <scrollbar :data="recommends" @pull-down="pullRefresh">
            <slider ref="mySwiper" />
            <home-nav />
            <!-- 热门推荐加载完成后更新滚动条 -->
            <recommend @loaded="updateScroll" />
        </scrollbar>
        <!-- 该页面自己的子路由 -->
        <router-view></router-view>
    </div>

</template>

<script>
import Slider from 'components/slider';
import Scrollbar from 'components/scroll';
import HomeNav from './nav';
import Recommend from './recommend';

export  {
    name:"Home"{
            recommends:[]
        }
    },methods:{
        updateScroll(recommends){
            this.recommends=recommends;
        },pullRefresh(end){刷新轮播图
            .$refs.mySwiper.getSliders().then(end);
        }
    }
}
</script>

<style scoped>
    .home{
        width:100%;
    }
</style>

 

效果图