微信小程序自定义swiper组件

---

第一步：画个页面 index.wxml

<!--index.wxml-->
<view class="container">
  <swiper class="swipers" autoplay="{{autoplay}}" current="{{currentSwiper}}" bindchange="swiperChange">  
        <block wx:for="{{imgUrls}}" wx:key='key'>  
            <swiper-item>  
                 <image src="{{item}}" class="slide-image" bindtap='tapBanner'  data-indexurl='{{item}}' ></image>  
            </swiper-item>  
        </block>  
    </swiper>  
   <!--重置小圆点的样式  -->
    <view class="dots">  
        <block wx:for="{{imgUrls}}" wx:key="key">  
            <view class="dot{{index == currentSwiper ? ' active' : ''}}"></view>  
        </block>  
    </view>  
</view>

第二步：添加样式

.container {
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-sizing: border-box;
  position: relative;
  width: 100%;
  align-items: center;
}

.swipers {
  height: 562rpx;
  width: 100%;
}

.slide-image {
  width: 750rpx;
  height: 562rpx;
  display: block;
}

.dots {
  width: 156rpx;
  height: 36rpx;
  display: flex;
  flex-direction: row;
  position: absolute;
  bottom: 20rpx;
}

/*未选中时的小圆点样式 */

.dot {
  width: 26rpx;
  height: 26rpx;
  border-radius: 50%;
  margin-right: 26rpx;
  background-color: white;
}

/*选中以后的小圆点样式  */

.active {
  width: 26rpx;
  height: 26rpx;
  background-color: coral;
}

第三步： js逻辑处理

//index.js
//获取应用实例
const app = getApp()

Page({

  data:{
    imgUrls: [
      "https://cdn.it120.cc/apifactory/2017/09/15/145c582252a7a20f21ad9a025ae8c9be.png",
      "https://cdn.it120.cc/apifactory/2017/09/15/73560c511f554eb4afd1dcade9d8ef67.png",
      "https://cdn.it120.cc/apifactory/2017/09/15/5acdd8f65ec85b413ee642dda795d835.png"    ],
    currentSwiper: 0,
    autoplay: true
  },

  //滑动事件监听
  swiperChange:function(event){
    this.setData({
      currentSwiper: event.detail.current
    });
  },

//banner点击事件
  tapBanner:function(event){
    //下面介绍两种banner 点击获取数据事件
    // 1. 通过数据源获取
    var indexUrl = this.data.imgUrls[this.data.currentSwiper];
    console.log(indexUrl);
    // 2 . 也可以通过自定义属性获取
    var url = event.currentTarget.dataset.indexurl;
    console.log(url);

  }
  
})

效果图：

yhx.gif