微信小程序----相对路径图片不显示

出现场景

在本地调试的时候本地图片显示,但是手机浏览的时候本地图片不显示。

出现图片不显示的原因

小程序只支持网络路径和base64的图片。图片转base64在线工具

处理方法

将图片都放到服务器，然后直接采用网络路径。
1.1 优点是能够放大量的图片。
1.2 缺点是有时开发中有大量的小图片，或者修改小图标，对于开发者来说，更换会很麻烦。
将图片都转换成 base64 的图片保存，使用时直接引入。图片转base64在线工具
2.1 优点是方便快捷，开发过程中容易更换。
2.2 缺点是由于微信小程序规定了每个文件不能超过500MB，超过另行打包。所以如果图片过大，或者量过大，都不方便。

优化处理

将网络路径图片和 base64 的图片结合使用。图片转base64在线工具

开发大图片（轮播等）或图片量大（商品图片等）的场景时，采用网络路径。

优点是产品发布后方便图片的上下架，不用再提交审核，使用静态图片的尴尬和麻烦。
开发logo、导航等小图片时，采用 base64 的图片。图片转base64在线工具

优点是开发时方便开发者更换，引入方便；转换快捷，用图片转base64在线工具可直接转换；不用开发时总是往服务器上传图片。

实践开发

开发效果图

首页的轮播和网吧列表都是采用的网络路径，订单页面的右箭头和更多商品图标都是采用的 base64 图片。

开发代码

1. 首页轮播和店铺列表JS

const app = getApp();
const urlList = require(\'../../utils/config.js\');
Page({
  data: {
    supplierList: [],
    iconList: iconList,
    bannerInfo: null,
    indicatorDots: true,//是否显示面板指示点
    autoplay: true,//是否开启自动切换
    interval: 3000,//自动切换时间间隔
    duration: 500,//滑动动画时长
    bannerList: [],
    shopList: [],
    currentPage: 1,
    pageSize: 10,
    total: 1000,
    myList: []
  },
  onLoad(){
    // 获取分享信息
    this.getShare();
  },
  onShow(){
    // 获取轮播列表
    this.getBannerList();

    // 获取当前地址
    wx.getLocation({
      success: res => {
        if (res.errMsg == \'getLocation:ok\') {
          this.getShopList(res);
        }
      },
      fail: res => {
        this.wetoast.toast({ title: \'获取定位失败，请打开定位，重新进入！\' });
      }
    })
  },
  // 获取店铺列表
  getShopList(obj){
    // 判断是否还有更多数据
    if (!app.loadMoreData(this)) { return }
    // 请求数据
    let account = wx.getStorageSync(\'accountInfo\');
    let location = obj;
    wx.request({
      url: urlList.shopListUrl,
      data: {
        // accountID: account.accountID,
        // passWord: account.passWord,
        longitude: location.longitude,
        latitude: location.latitude,
        currentPage: this.data.currentPage,
        pageSize: this.data.pageSize,
        sType: \'1\',
        token: app.globalData.token
      },
      success: res => {
        if(res.data.state == \'true\'){
          console.log(res)
          this.setData({
            shopList: this.data.shopList.concat(res.data.data.supplierList),
            currentPage: ++this.data.currentPage,
            total: res.data.data.total,
            __noMoreData__: app.loadSuccessData(this, res.data.data.supplierList)
          })
        }else{
          console.log(\'网吧列表：\' + res.data.exception)
          this.wetoast.toast({ title: \'网吧列表加载失败！\' });
        }
      }
    })
  },
  // 获取轮播列表
  getBannerList(){
    wx.request({
      url: urlList.advertPicListUrl,
      data: { appID: \'4\'},
      success: res => {
        if (res.data.state == \'true\') {
          // console.log(res.data.data.picList)
          this.setData({
            bannerList: res.data.data.picList
          })
        }else{
          console.log(\'轮播列表：\' + res.data.exception)
          this.wetoast.toast({ title: \'轮播列表加载失败！\' });
        }
      }
    })
  },
  //滚动加载
  onReachBottom(){
    this.getShopList(app.globalData.location);
  }
})

1. 首页轮播和店铺列表WXML

<scroll-view  scroll-y="true">
  <swiper class="rui-swiper" style=\'height:{{bannerInfo.height}}px\' current="0" indicator-dots="{{indicatorDots}}" vertical="{{vertical}}"
          autoplay="{{autoplay}}" interval="{{interval}}" duration="{{duration}}"
          indicator-color="rgba(0,0,0,.5)" indicator-active-color="#fff">
      <block wx:for-items="{{bannerList}}" wx:key="banner">
            <swiper-item>
              <block wx:if="{{item}}">
                // 读取轮播图片的网络路径
                <image class="rui-full" bindtap=\'bannerUrl\' data-banner="{{item}}" style=\'width:{{bannerInfo.width}}px;height:{{bannerInfo.height}}px\' src="{{item.picUrl}}"></image>
              </block>
              <block wx:else>
                <image class="rui-full" style=\'width:{{bannerInfo.width}}px;height:{{bannerInfo.height}}px\' src="../../images/default_pic.png"></image>
              </block>
            </swiper-item>
      </block>
  </swiper>
</scroll-view> 

<!--网吧列表  -->
<view wx:if="{{shopList.length > 0}}" class=\'rui-shop-sort\'>附近网吧</view>
<view wx:if="{{shopList.length > 0}}" wx:for="{{shopList}}" wx:key="shopList">
    <view class=\'rui-shop-list\' bindtap=\'goToGoodsList\' data-shopid="{{item.shopID}}">
      // 读取网吧列表的网吧图片的网络路径
      <image class=\'rui-shop-img\' src=\'{{item.sPicS}}\'></image>
      <view class=\'rui-shop-box\'>
        <view class=\'rui-shop-name\'>
          {{item.userName}}
          <text class=\'rui-icon\' wx:if="{{item.ishot == 1 && index < 3}}" style="background:url({{iconList.hotUrl}}) no-repeat center center/15px 15px;height:15px;width:15px;"></text>
        </view>
        <view class=\'rui-shop-distance\'>
          <text style=\'margin-right:10px;color:#ff8e32;\' wx:if="{{item.labels.length > 0 && labelsIndex < 4}}" wx:for-index="labelsIndex" wx:for="{{item.labels}}" wx:key="labels" wx:for-item="labels">{{labels}}</text>
          <text class=\'rui-fr\'>{{item.gpsDistance}}</text>
        </view>
        <view class=\'rui-shop-address\'>地址：{{item.corpAddress}}</view>
        <view class=\'rui-shop-active\' wx:if="{{item.activeDesc}}">
          <text>{{item.activeDesc}}</text>
          <text class=\'active\'>惠</text>
        </view>
      </view>
    </view>
</view>

2. 订单页的右箭头和更多商品JS

const app = getApp();
const urlList = require(\'../../utils/config.js\');
const iconList = require(\'../../utils/iconPath.js\');
Page({
  data: {
    currentPage: 1,
    pageSize: 10,
    total: 1000,
    orderList: [],
    __noMoreData__: {
      isMore: false,
      title: \'正在加载更多数据了...\'
    }
  },
  onPullDownRefresh(){
    this.setData({
      currentPage: 1,
      pageSize: 10,
      total: 1000,
      orderList: [],
      __noMoreData__: {
        isMore: true,
        title: \'正在加载更多数据了...\'
      }
    })
    setTimeout(() => { 
      this.getOrderList();
    },1000);
  },
  onLoad(){
    // 将 base64 的文件保存到当前page的data中
    this.setData({ iconList: iconList });
  },
  onShow(){
    // 获取订单列表
    this.getOrderList();
  },
  // 获取订单列表
  getOrderList(){
    // 判断是否还有更多数据
    if (!app.loadMoreData(this)){return}
    // 请求数据
    wx.request({
      url: urlList.orderListUrl,
      data: { 
        currentPage: this.data.currentPage,
        pageSize: this.data.pageSize,
        token: app.getToken()
      },
      success: res => {
        // console.log(res)
        app.withData(res, this, res => { 
          if (res.data.state == \'true\'){
            // console.log(res.data.data.orderList)
            this.setData({
              currentPage: ++this.data.currentPage,
              total: res.data.data.total,
              orderList: this.data.orderList.concat(res.data.data.orderList)
            })
            wx.stopPullDownRefresh();
          }
        })
      }
    })
  },
  // 滚动到底部加载
  onReachBottom() {
    this.getOrderList();
  }
})

2. 订单页的右箭头和更多商品WXML

<view class=\'rui-order-li\' wx:for="{{orderList}}" wx:key="orderList">
  <view class=\'rui-order-head\'>
    <view class=\'rui-order-shop-name\' data-shop=\'{{item}}\' bindtap=\'goToShop\'>
      {{item.userName}}
      // 读取右箭头的base64的图片
      <text class=\'rui-icon\' style=\'background:url({{iconList.moreUrl}}) no-repeat center center/8px 15px;height:15px;width:15px;\'></text>
    </view>
    <view class=\'rui-order-state {{item.orderState == 0 ? "rui-colory" : item.orderState == 4 ? "rui-colorg" : "rui-colorp"}}\'>{{item.orderStateText}}</view>
  </view>
  <view class=\'rui-order-goodslist\' id=\'{{item.orderID}}\' bindtap=\'getOrderId\'>
    <view class=\'rui-fl\'>
      <image wx:for="{{item.goodsList}}" wx:if="{{goodsnum < 5}}" wx:for-index="goodsnum" wx:key="goodsList" wx:for-item="goods" class=\'rui-order-goodsimg\' src="{{goods.sPics}}"></image>
      // 读取更多商品的base64的图片
      <view class=\'rui-order-detail-btn\' style=\'background:url({{iconList.moreGoodsUrl}}) no-repeat center center/25px 5px;\'></view>
    </view>
    <view class=\'rui-order-price\'>
      <view class=\'rui-colory\'>￥{{item.goodsAmountAll}}</view>
      <view class=\'rui-colorp rui-fs12\'>共{{item.totalGoodsNum}}件</view>
    </view>
  </view>
  <view class=\'rui-order-head\'>
    {{item.orderTime}}
    <view wx:if="{{item.orderState == 0}}" class=\'order-btn\' data-orderid="{{item}}" bindtap=\'goToPay\'>立即支付</view>
    <view wx:if="{{item.orderState == 4}}" class=\'order-btn\' data-orderid="{{item}}" bindtap=\'repeatBuy\'>再次购买</view>
  </view>
</view>

base64 的保存文件编辑

const iconPath = {
  starUrl: \'data:image/png;base64,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\'
}
module.exports = iconPath;

base64 的保存文件引入

const iconList = require(\'../../utils/iconPath.js\');

base64 的保存文件使用

// 将 base64 的文件保存到当前page的data中
this.setData({ iconList: iconList });

wxml

// 读取更多商品的base64的图片
<view class=\'rui-order-detail-btn\' style=\'background:url({{iconList.moreGoodsUrl}}) no-repeat center center/25px 5px;\'></view>