小程序瀑布流實現

實現思路：把圖片分成兩排，創建兩個數組，計算總數組中圖片的寬高，對比上一個圖片和當前的圖片高度，低的就給另一個數組添加。效果圖：

上代碼：

// miniprogram/pages/find/index.js
const app = getApp();
var util = require('../../utils/util.js')
var userInfo,shang_height=0;
const DB = wx.cloud.database()
var that;
Page({
  data: {
    list: []
  },
  get_img_height(url){
    return new Promise(ress=>{
      wx.getImageInfo({
        src: url,
        success (res) {
          console.log(res.width)
          console.log(res.height)
          ress(res.height)
          return res.height
        }
      })
    })
  },
  onShow: function () {
    that = this
    DB.collection('user')
      .get({
        success: function (res) {
          console.log('有城列表', res.data)
          var see_list = wx.getStorageSync('see_list') || [];
          let fen = 0;
          var list = res.data;
            list.forEach((item, idx) => {
              console.log(item)
              that.get_img_height(item.userInfoDetail.hande).then(rr=>{
                item.img_height = rr
              })
              if (see_list.indexOf(item._openid) != -1) {
                item.seeStatus = true
              } else {
                item.seeStatus = false
              }
              if(item.character_list){
                for (var itt in item.character_list) {
                  if (item.character_list[itt] == wx.getStorageSync('userInfo').character_list[itt]) {
                    item.fen = (item.fen + 5) || 5
                  } else {}
                }
              }

            })
            console.log(list)
        var vList = [];
        var v2List = [];
        for (var i = 0; i < list.length; i++) {
          if (shang_height<list[i].img_height) {
            vList.push(list[i])
          } else {
            v2List.push(list[i])
          }
          shang_height =list[i].img_height
        }
          that.setData({
            list,vList,v2List,
            _openid: wx.getStorageSync('userInfo').openid
          })
        }
      })
  },

})

<view>
	<view class='view_outer'>
		<view>
			<block wx:for="{{v2List}}" wx:key="index">
				<view class='user_callingcard' wx:if='{{item.userInfoDetail.name&&item._openid!=_openid}}' catchtap="nav_detail" data-userinfo="{{item}}">
					<view class="fen">性格 {{item.fen||0}}%</view>
					<image class='view_li' mode="widthFix" src='{{item.userInfoDetail.hande}}'></image>
					<view class='item_txt'>{{item.userInfoDetail.name}} {{item.userInfoDetail.nssmr}}</view>
					<!-- <view class='item_txt'> -->
					<!-- </view> -->
					<view class='item_txt2'>{{item.seeStatus?"已查看":"查看詳情1"}}
					</view>
				</view>
			</block>
		</view>

		<view>
			<block wx:for="{{vList}}" wx:key="index">
				<view class='user_callingcard' wx:if='{{item.userInfoDetail.name&&item._openid!=_openid}}' catchtap="nav_detail" data-userinfo="{{item}}">
					<view class="fen">性格 {{item.fen||0}}%</view>
					<image class='view_li' mode="widthFix" src='{{item.userInfoDetail.hande}}'></image>
					<view class='item_txt'>{{item.userInfoDetail.name}} {{item.userInfoDetail.nssmr}}</view>
					<!-- <view class='item_txt'> -->
					<!-- </view> -->
					<view class='item_txt2'>{{item.seeStatus?"已查看":"查看詳情2"}}
					</view>
				</view>
			</block>
		</view>
	</view>
	<!-- <view class='more' bindtap='to_arr' id='2'>點擊查看更多</view> -->

</view>

/* miniprogram/pages/find/index.wxss */
.p_r {
  display: flex;
  flex-direction: row;
  text-align: center;
}

.top_block {
  padding-top: 30rpx;
  padding-bottom: 20rpx;
  border-bottom: 1px solid darkblue;
}

.mg_bo {
  flex: 1;
}

.col {
  color: #757575
}

.da {
  font-size: 26rpx;
  margin-top: 16rpx;
}

.acaca {
  color: darkblue;
}

.user_callingcard {
  /* display: block;
  border-radius: 20rpx;
  width: 43%; */
  box-shadow: 4rpx 4rpx 4rpx 4rpx #dfdfdf;
  /* margin: 20rpx; */
  
  width: 330rpx;
  /* height: 550rpx; */
  border-radius: 20rpx;
  float: left;
  margin: 4px 0 0 1px;
  margin-right: 24rpx;
  position: relative;
  margin-bottom: 30rpx;
}

.user_callingcard image {
  display: block;
  width: 100%;
}

.view_outer {
  padding-top: 10rpx;
  margin-left: 26rpx;
  display: flex; 
  flex-direction: row;
}

.view_li {
  width: 300rpx;
  border-radius: 20rpx 20rpx 0 0 ;
}
.fen{
  position: absolute;
  right: 20rpx;
  top: 10rpx;
  font-size: 22rpx;
  /* background: #dfdfdf; */
  color: white;
  text-shadow:5px 2px 6px #000;

}
.more {
  text-align: center;
  margin: 20rpx auto;
  width: 70%;
  /* border: 1px solid #666; */
  border-radius: 15rpx;
  color: #999;
  padding: 5rpx
}


.item_txt2 {
  text-align: center;
  width: 100%;
  height: 90rpx;
  position: relative;
  top: 10rpx;
  line-height: 90rpx;
  background: wheat;
  color: cadetblue;
  margin-top: 16rpx;
  border-radius: 0 0 20rpx 20rpx;
}