微信小程序-可滑动步骤条（原生）

版权声明：来自MarieDreamer https://blog.csdn.net/qq_33514421/article/details/82781787

效果

（步骤条颜色不对是录制工具的问题）

 思路

其实与轮播图类似，使用了两个并排的轮播容器，在滑动监听后，给图片加上移动和缩放动画。

扩展

可以用于标签页的切换。

vue与微信小程序有类似的地方，所以微信小程序做出的效果，原理也可用于vue在网页上的应用。

代码

wxml

<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>

wxss

.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;
}

js

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
      })
    }
  }
  
})