小程式輪播圖總結

wxml內容：

<view class="container">
  <navigator class="search">
    <icon type="search" size="13"></icon>搜索
  </navigator>

  <view class="banner_box">
    <swiper class="banner" indicator-dots="true" indicator-color="rbag(255,255,255,0.3)" indicator-active-color="#42bd56" autoplay="true"
 circular="true" style="height:{{swiperHeight}}">
      <block wx:for="{{bannerData}}">  //從'indicator-dots'開始分別是設置輪播圖的圓點，圓點顏色，輪播到某圖時圓點的顏色，自動播放，圓點出現，swiperHeight：圖片的高度

          <swiper-item>
            <navigator>
              <image mode="widthFix" src="{{item.banner_img}}" bindload="imgLoad"></image>  //bindload：圖片載入後觸發的時間 ,這裡要設置mode="widthFix"

            </navigator>
          </swiper-item>
      </block>
    </swiper>
  </view>
</view>

js內容：

//獲取應用實例
const app = getApp()

Page({
  data: {
    bannerData: [{ id: 1, banner_img: "https://img3.doubanio.com/view/photo/l/public/p2563815623.webp" }, { id: 2, banner_img: "https://img3.doubanio.com/view/photo/l/public/p2564461744.webp" }, { id: 3, banner_img: "https://img3.doubanio.com/view/photo/s_ratio_poster/public/p2563630521.webp" }
    ],
   
    swiperHeight:0
  },

  
  onLoad: function () {
    
  },

  imgLoad:function(e){
    console.log(e.detail);
    var winWidth=wx.getSystemInfoSync().windowWidth //獲取屏幕寬度

    var imgWidth=e.detail.width; //圖片寬度
    var imgHeight = e.detail.height; //圖片寬度
    this.setData({
      swiperHeight: winWidth*imgHeight/imgWidth+'px'  
    })


  }
})

css內容：

/*搜索*/
.search{
  width: 90vw;
  height: 60rpx;
  line-height: 60rpx;
  text-align: center;
  margin: 30rpx auto;
  background-color: #f7f7f7;
  color: #bbb;
}

.search icon{
  margin-right: 12rpx;
}

.banner navigator{
  width: 100%;
  height: 100%;
}

 .banner image{
   width: 100%;
   height: 100%;
 }

結果：