微信小程序轮播图自定义光标位置

<!--start banner   -->
<swiper class='home-swiper' autoplay='true' bindchange='changDot' interval='4000'>
  <!-- 设置自动播放，切换间隔时间-->
  <swiper-item wx:for="{{slider}}" wx:for-index="index" wx:key="slider">
    <image src='{{item.img}}'></image>
  </swiper-item>
</swiper>
<!-- 轮播图光标 -->
<view class="dots">
  <block wx:for="{{slider}}" wx:key="slider">
    <view class="dot {{index == swiperCurrent?'actives':''}}"></view>
  </block>
</view>
<!-- end banner -->

 
.home-swiper {
  width: 100%;
  height: 350rpx;
  position: relative;
}
 
.home-swiper image {
  width: 100%;
  height: 100%;
}
 

 
.dots {
  display: flex;
  flex-direction: row;
  position: absolute;
  top: 311rpx;
  width: 100%;
  height: 50rpx;
  justify-content: center;
}
 
.dots .dot {
  width: 20rpx;
  height: 20rpx;
  
  
  margin-left: 12rpx;
  background: #fff;
  border-radius: 20rpx;
  
  opacity: 0.44;
}
 

 
.dots .actives {
  background-color: #fff;
  opacity: 1;
}

Page({
 
  
  data: {
    swiperCurrent: 0,
    slider :[
      {'img':'/img/img/1.jpg'},
      { 'img': '/img/img/1.jpg' },
      { 'img': '/img/img/1.jpg' },
      { 'img': '/img/img/1.jpg' },
      { 'img': '/img/img/1.jpg' }
    ]
  },
  // 轮播图下标
  changDot(e) {
    this.setData({
      swiperCurrent: e.detail.current
    });
  },
  
  onLoad: function(options) {
 
  },
 
  
  onReady: function() {
 
  },
 
  
  onShow: function() {
 
  },
 
  
  onHide: function() {
 
  },
 
  
  onUnload: function() {
 
  },
 
  
  onPullDownRefresh: function() {
 
  },
 
  
  onReachBottom: function() {
 
  },
 
  
  onShareAppMessage: function() {
 
  }
})