小程序样例2：简单图片分类查看

基本功能：

1、根据分类展示图片，点击类目切换图片：

2、点击分类编辑，编辑分类显示：

3、点击某个分类，控制主页该分类显示和不显示：

类目2置灰后，主页不再显示

4、点击分类跳转到具体的分类目录

5、点击二级分类，预览图片

源码实现

主页index：

获取类目数据，选择某个类目时，获取对应类目下的图片列表。

因为有类目编辑，数据会发生变化，某个类目显示和隐藏后，主页要重新获取数据；

index.js

//index.js
//获取应用实例
var app = getApp()

Page({
   data: {
    contentList:[], // 当前类目图片列表
    currentType:wx.getStorageSync('currentType'),
    types:[]
  },

  onShow() {
    // types 会发生变化，放在onload中不合适
    console.log("onShow")
    let types = wx.getStorageSync("types");
    console.log(types)
    if (!types) {
      types = app.globalData.types;
    } 
    console.log(types)
    this.setData({types: types})
    if(!this.data.currentType){
      let that = this
      types.every(function(item){
        if(item.is_show){
            wx.setStorageSync('currentType', item.value)
            that.setData({currentType:item.value})
            return false
          }else{
            return true
          }
      })
    }
    
    if(this.data.currentType){
        this.getList(this.data.currentType)
    }
  },

  onLoad:function(){
    
  },
  getList:function(type){
    // 获取不同类型的图片
    console.log(type)
    let list = app.globalData.contentList1;
    if (type == 'leimu1') {
      list = app.globalData.contentList1;
    } else if (type == 'leimu2') {
      list = app.globalData.contentList2;
    } else if (type == 'leimu3') {
      list = app.globalData.contentList3;
    }
    this.setData({contentList: list});
  },
  //点击某一个title条
  changeType:function(e){
    var type = e.currentTarget.dataset.value
    if(type == this.data.currentType){
      return;
    }
    this.setData({currentType:type})
    app.globalData.currentType = type
    this.getList(type)
  },
  gotoTypeEdit:function(e){
    wx.navigateTo({
      url: '../types/types',
    })
  },
  gotoAlbum:function(e){
    console.log("gotoAlbum");
    let param = e.currentTarget.dataset, 
    title = param.title, 
    id=param.id.replace(/[^0-9]/ig,"")
    console.log("param: " + param);
    console.log("title: " + title);
    console.log("id: " + id);
    var url = "../album/album?title="+title+"&id="+id;
    console.log("ready");
    wx.navigateTo({
      url:url,
      success: function(res){
        console.log('跳转到news页面成功')// success
      },
      fail: function() {
      console.log('跳转到news页面失败')  // fail
      },
      complete: function() {
        console.log('跳转到news页面完成') // complete
      }
    })
  }
})

index.wxml

<!--index.wxml-->
<view class="container">
  <!--nav  bar-->
  <view class="nav_bar">
    <scroll-view class="nav_bar_scroll" scroll-x="true">
      <block wx:for="{{types}}" wx:key="title" wx:for-item="type">
        <block wx:if="{{type.is_show}}">
          <view bindtap="changeType" class="{{type.value == currentType ? 'current' : ''}} scroll_item" data-value="{{type.value}}">{{type.title}}</view>
        </block>
      </block>
    </scroll-view>
    <view class="edit_nav_bar" bindtap="gotoTypeEdit">
        <image class="edit_nav_bar_btn" src="/image/nav_bar_edit.png"></image>  
    </view>
  </view>
 
  <!--beauty list content-->
  <view class="content">
    <block wx:for="{{contentList}}" wx:key="href">
      <view class="beauty_item" data-id="{{item.href}}" data-title="{{item.title}}" bindtap="gotoAlbum">
        <image src="{{item.thumbSrc}}" mode="aspectFit"></image>
        <text>{{item.title}}</text>
    </view>
    </block>
    
  </view>
  
  
</view>

index.wxss

.nav_bar{
    box-sizing:border-box;
    position: fixed;
    top: 0px;
    left:0px;
    width: 100%;
    border-bottom: 1px solid #D5D5D5;
    display: flex;
    background-color: #ffffff;
    z-index: 1000;
}
.nav_bar_scroll{
    flex:1;
    font-size:30rpx;
    width: 100rpx;
    height: 90rpx;
    box-sizing: border-box;
    white-space: nowrap;
}
.scroll_item{
    display: inline-block;
    padding: 0 20rpx;
    line-height:90rpx;
}
.nav_bar_scroll .current{
    color:#BE304D;
}
.edit_nav_bar{
    margin: 20rpx 0 0 0;
    height: 50rpx;
    width:70rpx;
    border-left:1px solid #ccc;
    display: flex;
    justify-content: center;
    align-items: center;
}
.edit_nav_bar_btn{
    width: 50rpx;
    height: 50rpx;
}
.content{
    margin: 90rpx 0 0 0;
    padding: 20rpx;
    display: flex;
    justify-content: space-between;
    flex-wrap:wrap;
}
.beauty_item{
    display: flex;
    flex-direction: column;
    align-items: center;
    width:345rpx;
    margin: 0 0 20rpx 0;
}
.beauty_item image{
    width: 100%;
    height: 450rpx;
}
.beauty_item text{
    
    display: block;
    font-size:28rpx;
    color:#000000;
    line-height: 40rpx;
    height: 80rpx;
    overflow: hidden;
}

类目编辑types：

types.js

var app = getApp()

Page({
    data:{
      types: app.globalData.types
    },
    onLoad:function(){
      if (wx.getStorageSync('types')) {
        this.setData({types: wx.getStorageSync('types')})
      } 
    },
    changeTypeStatus:function(e){
        var value = e.currentTarget.dataset.value
        var currentType = wx.getStorageSync('currentType') 
        var showCount = 0, isCurrentHide = false
        var types = this.data.types.map(function(item){
            if(item.value == value){
                item.is_show = !item.is_show
                if(value == currentType && !item.is_show){
                    isCurrentHide = true;
                }
            }
            if(item.is_show){
                showCount++;
            }
            return item
        })
        //当前选中的被隐藏了
        if(showCount < 1){
          wx.showToast({title: "不能全部隐藏", icon:"none",})
            return;
        }
        if(isCurrentHide){
            types.every(function(item){
                if(item.is_show){
                     wx.setStorageSync('currentType', item.value)
                     return false
                }else{
                    return true
                }
            })
        }
        this.setData({types:types})
        app.globalData.types = types;
        wx.setStorageSync("types", types)
    }
})

types.wxml

<view class="container">
    <view class="tips">
        点击可切换标签状态[深色显示，灰色为隐藏]
    </view>
    <view class="type-content">
        <block wx:for="{{types}}" wx:for-item="type" wx:key="title">
            <view data-value="{{type.value}}" class="type-item {{type.is_show ? 'type-item-show' : 'type-item-hide'}}" bindtap="changeTypeStatus">
                {{type.title}}
            </view>
        </block>
    </view>
</view>

types.wxss

.tips{
    box-sizing: border-box;
    background-color: #E6E6E6;
    line-height: 80rpx;
    font-size:30rpx;
    padding: 0 20rpx;
    width: 750rpx;
}
.type-content{
    padding: 25rpx 25rpx;
    display: flex;
    flex-flow:row wrap;
}
.type-item{
    width:155rpx;
    text-align: center;
    font-size:30rpx;
    line-height: 80rpx;
    margin: 20rpx 10rpx;
}
.type-item-show{
    background-color: #BE304D;
    color:#ffffff;
}
.type-item-hide{
    background-color: #E6E6E6;
    color:#C4C4C4;
}

类目详情album：

album.js

var app = getApp()

Page({
    data:{
        album:[],
        albumUrlList: [], // 点击预览的图片列表 每个分类图片不同需要设置数据
        imgObjList:app.globalData.imgList,
        total:0,
        albumCount: 0,
        title:'',
        id:'',
        countShow:true,
        currentIndex:1
    },
    onLoad:function(options){
      console.log(this.data.imgObjList)
       this.setData({
         title: options.title,
         total: this.data.imgObjList.length})
    },
    onReady:function(){
        wx.setNavigationBarTitle({title:this.data.title})
    },

    imageload:function(e){
      // 图片加载预处理
    },
    preiviewwImage(e){
      console.log(e.currentTarget.dataset)
      let albumUrlList = e.currentTarget.dataset.item.albumUrlList
      wx.previewImage({
        current:albumUrlList[0],
        urls:albumUrlList
      })
    },
    hideCount:function(){
      this.setData({countShow:false})
    }
})

album.wxml

<view class="container">
    <scroll-view scroll-y="true" class="image-list-wrap">
    <block wx:for="{{imgObjList}}" wx:key="id" wx:item="{{item}}">
        <view>
        <image bindtap="preiviewwImage" mode="aspectFit" src="{{item.imgSrc}}" data-item="{{item}}" data-index="{{index}}" style="width:{{item.w}}rpx;height:{{item.h}}rpx"/>
        </view>
    </block>
</scroll-view>
    <!--图片数目-->
    <block wx:if="{{countShow}}">
        <view class="albumCount" bindtap="hideCount">
        {{total}}
        </view>
    </block>
</view>

album.wxss

.image-list-wrap{
    width: 100%;
}
.albumCount{
    width: 120rpx;
    height:120rpx;
    border-radius: 50%;
    background-color: #BE304D;
    color:#ffffff;
    position: fixed;
    right:30rpx;
    top:30rpx;
    font-size:35rpx;
    display: flex;
    justify-content: center;
    align-items: center;
}

全局数据：

app.js

//app.js
App({
  onLaunch: function () {

  },
  getUserInfo:function(cb){
    var that = this
    if(this.globalData.userInfo){
      typeof cb == "function" && cb(this.globalData.userInfo)
    }else{
      //调用登录接口
      wx.login({
        success: function () {
          wx.getUserInfo({
            success: function (res) {
              that.globalData.userInfo = res.userInfo
              typeof cb == "function" && cb(that.globalData.userInfo)
            }
          })
        }
      })
    }
  },
  globalData:{
    api:{
      listBaseUrl:"https://route.showapi.com/959-1?showapi_appid=25744&showapi_sign=f3807528bd5d4a4ea6b2027e8286e0dc&type=",
      albumBaseurl:"https://route.showapi.com/959-2?id=%id%&showapi_appid=25744&showapi_sign=f3807528bd5d4a4ea6b2027e8286e0dc",
      meizhiurl:"http://meizhitu.applinzi.com/",
    },
    currentType:'',
    types:[
      {
        title:"类目1",
        value:"leimu1",
        is_show:true
      },
      {
        title:"类目2",
        value:"leimu2",
        is_show:true
      },
      {
        title:"类目3",
        value:"leimu3",
        is_show:true
      }
    ],
    contentList1:[
      {'href':'001',
      'title':'pic01',
      'thumbSrc':'https://img1.baidu.com/it/u=1626917682,1417287895&fm=253&fmt=auto&app=138&f=JPEG?w=500&h=500'
      },
      {'href':'002',
      'title':'pic02',
      'thumbSrc':'https://img95.699pic.com/xsj/0s/o9/53.jpg%21/fw/700/watermark/url/L3hzai93YXRlcl9kZXRhaWwyLnBuZw/align/southeast'
      },
      {'href':'003',
      'title':'pic03',
      'thumbSrc':'https://t8.baidu.com/it/u=3762038486,3670950445&fm=193'
      },
      {'href':'004',
      'title':'pic04',
      'thumbSrc':'https://img95.699pic.com/xsj/0c/sn/m6.jpg%21/fw/700/watermark/url/L3hzai93YXRlcl9kZXRhaWwyLnBuZw/align/southeast'
      }
    ],
    contentList2:[
      {'href':'001',
      'title':'pic01',
      'thumbSrc':'https://img2.baidu.com/it/u=3727720492,1405473130&fm=253&fmt=auto&app=138&f=JPEG?w=500&h=500'
      },
      {'href':'002',
      'title':'pic02',
      'thumbSrc':'https://img01.jituwang.com/161108/257309-16110Q5444017.jpg'
      },
      {'href':'003',
      'title':'pic03',
      'thumbSrc':'https://img95.699pic.com/xsj/18/jv/lk.jpg%21/fw/700/watermark/url/L3hzai93YXRlcl9kZXRhaWwyLnBuZw/align/southeast'
      },
      {'href':'004',
      'title':'pic04',
      'thumbSrc':'https://img95.699pic.com/xsj/0s/a1/fc.jpg%21/fw/700/watermark/url/L3hzai93YXRlcl9kZXRhaWwyLnBuZw/align/southeast'
      }
    ],
    contentList3:[
      {'href':'001',
      'title':'pic01',
      'thumbSrc':'https://img95.699pic.com/xsj/06/ok/x7.jpg%21/fw/700/watermark/url/L3hzai93YXRlcl9kZXRhaWwyLnBuZw/align/southeast'
      },
      {'href':'002',
      'title':'pic02',
      'thumbSrc':'https://img95.699pic.com/xsj/0s/o9/53.jpg%21/fw/700/watermark/url/L3hzai93YXRlcl9kZXRhaWwyLnBuZw/align/southeast'
      },
      {'href':'003',
      'title':'pic03',
      'thumbSrc':'https://img95.699pic.com/xsj/0b/3p/uu.jpg%21/fw/700/watermark/url/L3hzai93YXRlcl9kZXRhaWwyLnBuZw/align/southeast'
      },
      {'href':'004',
      'title':'pic04',
      'thumbSrc':'https://img95.699pic.com/xsj/1l/ys/dz.jpg%21/fw/700/watermark/url/L3hzai93YXRlcl9kZXRhaWwyLnBuZw/align/southeast'
      }
    ],
    imgList: [
      {'id':1,
       'imgSrc':'https://t7.baidu.com/it/u=3797771203,3932368528&fm=193&f=GIF',
        w:750,
        h:375,
        albumUrlList: ['https://t7.baidu.com/it/u=2340400811,4174965252&fm=193&f=GIF', 'https://t7.baidu.com/it/u=3379862688,946992288&fm=193&f=GIF']
      },
      {'id':2,
       'imgSrc':'https://t7.baidu.com/it/u=1522757721,1408622889&fm=193&f=GIF',
        w:750,
        h:375,
        albumUrlList: ['https://t7.baidu.com/it/u=613125779,842332090&fm=193&f=GIF', 'https://t7.baidu.com/it/u=2784816167,2846782825&fm=193&f=GIF']
      },
      {'id':3,
       'imgSrc':'https://t7.baidu.com/it/u=3929020656,3513462146&fm=193&f=GIF',
        w:750,
        h:375,
        albumUrlList: ['https://t7.baidu.com/it/u=1395795138,3058754288&fm=193&f=GIF', 'https://t7.baidu.com/it/u=4022230151,492212515&fm=193&f=GIF']
      }
    ],
  }
  
})

app.json

{
  "pages":[
    "pages/index/index",
    "pages/album/album",
    "pages/types/types"
  ],
  "window":{
    "backgroundTextStyle":"light",
    "navigationBarBackgroundColor": "#BE304D",
    "navigationBarTitleText": "图片查看",
    "navigationBarTextStyle":"white"
  },
  "debug":false
}

app.wxss

/**app.wxss**/
page{
  height: 100%;
}
.container {
  min-height: 100%;
  box-sizing: border-box;
  position: relative;
} 

图片都是从百度图片地址，实际以项目后台接口返回为准。

个人小程序创业项目?? #小程序://朋友圈子/VMEWRjrOTum4Soa? 有想法的朋友可以一起交流下~