微信小程序实现banner图轮播效果

indicator-active-color="#007aff"//修改选中图片圆点的颜色

const app = getApp() Page({ data: { //-----------模拟banner图----------- imgUrls: [ '/image/1545118381903.jpg', '/image/1545118566631.jpg' ], circular: true, //是否显示画板指示点  indicatorDots: true, //选中点的颜色  //是否竖直  vertical: false, //是否自动切换  autoplay: true, //自动切换的间隔 interval: 3000, //滑动动画时长毫秒  duration: 1000, //所有图片的高度  imgheights: [], //图片宽度  imgwidth: 750, //默认  current: 0 }, imageLoad: function (e) {//获取图片真实宽度  var imgwidth = e.detail.width, imgheight = e.detail.height, //宽高比  ratio = imgwidth / imgheight; console.log(imgwidth, imgheight) //计算的高度值  var viewHeight = 750 / ratio; var imgheight = viewHeight; var imgheights = this.data.imgheights; //把每一张图片的对应的高度记录到数组里  imgheights[e.target.dataset.id] = imgheight; this.setData({ imgheights: imgheights }) }, bindchange: function (e) { // console.log(e.detail.current) this.setData({ current: e.detail.current }) }, }})

<!-------------首页轮播图----------------- --><view class='swiper'> <swiper indicator-dots="{{indicatorDots}}" vertical="{{vertical}}" autoplay="{{autoplay}}" duration="{{duration}}" interval='{{interval}}'indicator-active-color="#007aff" bindchange="bindchange" circular="{{circular}}" style="height:{{imgheights[current]}}rpx;"> <block wx:for='{{imgUrls}}' wx:key="{{index}}"> <swiper-item> <image src="{{item}}" data-id='{{index}}' class="slide-image" mode="widthFix" bindload="imageLoad" /> </swiper-item> </block> </swiper></view>

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