template3/components/page/banner/index.vue

<template>
  <view class="diy-banner" :style="{ height: `${imgHeights[imgCurrent]}px` }">
    <!-- 图片轮播 -->
    <swiper class="swiper-box" :autoplay="autoplay" :duration="duration" :circular="true" :interval="itemStyle.interval * 1000" @change="_bindChange">
      <swiper-item v-for="(dataItem, index) in newList" :key="index">
        <image mode="widthFix" class="slide-image" :src="dataItem.imgUrl" @click="onLink(dataItem.link)" @load="_imagesHeight" />
      </swiper-item>
    </swiper>
    <!-- 指示点 -->
    <view class="indicator-dots" :class="itemStyle.btnShape">
      <view class="dots-item" :class="{ active: imgCurrent == index }" :style="{ backgroundColor: itemStyle.btnColor }"
        v-for="(dataItem, index) in newList" :key="index"></view>
    </view>
  </view>
</template>

<script>
  import mixin from '../mixin';

  export default {
    name: 'Banner',

    /**
     * 组件的属性列表
     * 用于组件自定义设置
     */
    props: {
      itemIndex: String,
      itemStyle: Object,
      params: Object,
      dataList: Array
    },

    mixins: [mixin],

    /**
     * 私有数据,组件的初始数据
     * 可用于模版渲染
     */
    data() {
      return {
        windowWidth: 750,
        indicatorDots: false, // 是否显示面板指示点
        autoplay: true, // 是否自动切换
        duration: 800, // 滑动动画时长
        imgHeights: [], // 图片的高度
        imgCurrent: 0 ,// 当前banne所在滑块指针
				newList: [],
      };
    },
		
		watch:{
			dataList:{
				immediate:true,
				handler(newData){
					this.newList = this.$http2https(newData,'imgUrl')
				}
			}
		},
    created() {
      const app = this;
      uni.getSystemInfo({
        success({ windowWidth }) {
          app.windowWidth = windowWidth > 750 ? 750 : windowWidth;
        }
      });
    },

    /**
     * 组件的方法列表
     * 更新属性和数据的方法与更新页面数据的方法类似
     */
    methods: {
      /**
       * 计算图片高度
       */
      _imagesHeight({ detail }) {
        const app = this;
        // 获取图片真实宽度
        const { width, height } = detail;
        // 宽高比
        const ratio = width / height;
        // 计算的高度值
        const viewHeight = app.windowWidth / ratio;
        // 把每一张图片的高度记录到数组里
        app.imgHeights.push(viewHeight);
      },

      /**
       * 记录当前指针
       */
      _bindChange(e) {
        this.imgCurrent = e.detail.current;
      }
    }
  };
</script>

<style lang="scss" scoped>
  .diy-banner {
    position: relative;

    // swiper组件
    .swiper-box {
      height: 100%;

      .slide-image {
        width: 100%;
        height: 100%;
        margin: 0 auto;
        display: block;
      }
    }

    /* 指示点 */
    .indicator-dots {
      width: 100%;
      height: 28rpx;
      padding: 0 20rpx;
      position: absolute;
      left: 0;
      right: 0;
      bottom: 20rpx;
      opacity: 0.8;
      display: flex;
      justify-content: center;

      .dots-item {
        width: 16rpx;
        height: 16rpx;
        margin-right: 8rpx;
        background-color: #fff;

        &:last-child {
          margin-right: 0;
        }

        &.active {
          background-color: #313131 !important;
        }
      }

      // 圆形
      &.round .dots-item {
        width: 16rpx;
        height: 16rpx;
        border-radius: 20rpx;
      }

      // 正方形
      &.square .dots-item {
        width: 16rpx;
        height: 16rpx;
      }

      // 长方形
      &.rectangle .dots-item {
        width: 22rpx;
        height: 14rpx;
      }
    }
  }
</style>