小程序轮播图实现

效果图：

 

wxml:

<view class="recommend" >
  <view class="swiper-container">
    <swiper autoplay="auto" interval="5000" duration="500" current="{{swiperCurrent}}" bindchange="swiperChange" class="swiper">
      <block wx:for="{{slider}}" wx:key="unique">
        <swiper-item data-id="{{item.id}}" data-url="{{item.linkUrl}}">
          <image src="{{item.picUrl}}" class="img"></image>
        </swiper-item>
      </block>
    </swiper>
    <view class="dots">
      <block wx:for="{{slider}}" wx:key="unique">
        <view class="dot{{index == swiperCurrent ? ' active' : ''}}" bindtap="chuangEvent" id="{{index}}">{{index+1}}</view>
      </block>
    </view>
  </view>
</view>

wxss:

/* 轮播图 */
.swiper-container{
  position: relative;
}
.swiper-container .swiper{
  height: 400rpx;
}
.swiper-container .swiper .img{
  width: 100%;
  height: 100%;
}
.swiper-container .dots{
  position: absolute;
  right: 40rpx;
  bottom: 20rpx;
  display: flex;
  justify-content: center;
}
.swiper-container .dots .dot{
  margin: 0 10rpx;
  width: 28rpx;
  height: 28rpx;
  background: #fff;
  border-radius: 50%;
  transition: all .6s;
  font: 300 18rpx/28rpx "microsoft yahei";
  text-align: center;
}
.swiper-container .dots .dot.active{
  background: #f80;
  color:#fff;
}

util.js:

//网络访问
function getRecommend(callback) {
  wx.request({
    url: 'https://c.y.qq.com/musichall/fcgi-bin/fcg_yqqhomepagerecommend.fcg',
    data: {
      g_tk: 5381,
      uin: 0,
      format: 'json',
      inCharset: 'utf-8',
      outCharset: 'utf-8',
      notice: 0,
      platform: 'h5',
      needNewCode: 1,
      _: Date.now()
    },
    method: 'GET',
    header: { 'content-Type': 'application/json' },
    success: function (res) {
      if (res.statusCode == 200) {
        callback(res.data);
      }
    }
  })
}

module.exports = {
  getRecommend: getRecommend
}

js:

//导入js
var util = require('../../utils/util.js')
//获取应用实例
const app = getApp()

Page({
  data: {
    slider: [],
    swiperCurrent: 0
  },


  onLoad: function () {

    var that = this;
    //网络访问，获取轮播图的图片
    util.getRecommend(function (data) {
      that.setData({
        slider: data.data.slider
      })
    });
  },
  //轮播图的切换事件
  swiperChange: function (e) {
    //只要把切换后当前的index传给<swiper>组件的current属性即可
    this.setData({
      swiperCurrent: e.detail.current
    })
  },
  //点击指示点切换
  chuangEvent: function (e) {
    this.setData({
      swiperCurrent: e.currentTarget.id
    })