微信小程序实现原生步骤条

<view class='window'> <view class='content' bindtouchstart='touchS' bindtouchend='touchE' style='left:{{left}}rpx'>  <view wx:for="{{list}}">   <!-- 时间线 -->   <view class='pot'>    <view class='{{index == 0?"blank":"line"}}'></view>       <view class='circle' style='background:{{show_index == index?"orange":""}}'></view>    <view class='{{index == length - 1?"blank":"line"}}'></view>   </view>   <!-- 图片 -->   <view class='pic_container'>    <image class='pic' style='{{show_index != index?"transform:scale(0.5,0.5)":""}}' src="../../images/{{index+1}}.jpg"></image>   </view>  </view> </view></view>

.window{ width: 450rpx; background-color: #eee; padding: 25rpx; position: relative; overflow: hidden; margin: 0 auto; border-radius: 20rpx;}.content{ display: flex; position: relative; transition: all 0.5s;}.content>view{ display: flex; flex-direction: column; align-items: center;}.pot{ width: 450rpx; display: flex; align-items: center; justify-content: space-between;}.circle{ border-radius: 100%; height: 20rpx; width: 20rpx; border:4rpx solid orange;}.line{ height: 4rpx; width: 50%; background: orange;}.blank{ height: 4rpx; width: 50%;}.pic_container{ width: 450rpx; height: 450rpx; display: flex; justify-content:center; align-items: center;}.pic{ width: 400rpx; height: 400rpx; transition: all 0.5s;}

Page({ data: {  list: ['1', '2', '3'],  left:0,  show_index:0 },  onLoad: function () {  this.setData({   length:this.data.list.length  }) },  touchS:function(e){  var that = this;  this.data.start = e.touches[0].pageX;  this.data.start_left = this.data.left; },  touchE:function(e){  var that = this;  this.data.end = e.changedTouches[0].pageX;  var distance = this.data.end - this.data.start;  //左滑  if (distance <= -40 && this.data.left > -900) {   this.setData({    left: that.data.start_left - 450,    show_index:++ this.data.show_index   })  }  //不滑  else if(distance <= 40){   this.setData({    left: that.data.start_left,   })  }  //右滑  else if (distance > 40 && this.data.left < 0) {   this.setData({    left: that.data.start_left + 450,    show_index: --this.data.show_index   })  } } })