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留言板是一款能实现浏览留言、发表留言、删除留言和编辑留言的小程序,用户能够浏览当前的已留言内容,并且能按照时间的升序来查看最新的留言内容;能够发表自己的留言内容,在留言发表页填写相关项后即可发表,并能查看到新留言内容;能够删除不需要的留言;能够修改留言内容。因此,简单留言板的功能主要为显示留言、发表留言删除留言和编辑留言。
根据功能需求分析,共设计4个页面:首页(显示留言页)、发表留言页、编辑留言页和详情页
首页实现了留言的显示
单击首页中的发表留言图标十,就可以发表留言
单击某一留言的主题,即可显示该留言的详情页
在首页单击“删除”按钮,即可删除该留言内容
单击“编辑”按钮,即可修改该留言内容
根据留言板功能,设计数据库表名为test,其中设计的字段有id(编号)、de(标题)content(内容)、image(图像)、count(次数)5个字段,通过Bmob后端云设计
需要下载及安装Bmod SDK,解压后导入其utils文件夹下的bmob.js文件和common.js文件,然后复制粘贴到你的项目文件夹下的utils文件夹里
项目分为三个包index、detail和image,分别为首页、详情页和图像
小程序代码实现的第一步是设置整个应用的配置,修改根目录下的app.json,示例代码如下:
- {
- "pages": [
- "pages/index/index",
- "pages/detail/detail",
- "pages/logs/logs"
- ],
- "window": {
- "navigationBarTextStyle": "black",
- "navigationBarBackgroundColor": "#3891f8",
- "navigationBarTitleText": "小小留言板",
- "backgroundTextStyle":"light"
- },
- "style": "v2",
- "rendererOptions": {
- "skyline": {
- "defaultDisplayBlock": true,
- "disableABTest": true,
- "sdkVersionBegin": "3.0.0",
- "sdkVersionEnd": "15.255.255"
- }
- },
- "componentFramework": "glass-easel",
- "sitemapLocation": "sitemap.json",
- "lazyCodeLoading": "requiredComponents"
- }
app.js代码如下:
- var Bmob=require('utils/bmob.js')
- Bmob.initialize("a57b05be4060c8ea7c8d18f76442fc1e","6209f008e733af8e0251fec19113db3d");
- App({
-
- })
index.wxml代码如下:
- <image class="toWrite" bindtap="toAddDiary" src="../img/头像.jpg"/>
- <!-- 显示留言 -->
- <view class="page">
- <scroll-view
- lower-threshold="800"
- bindscrolltolower="pullUpLoad"
- upper-threshold="0"
- scroll-y="true"
- style="height:50px;">
- <view class="page_bd">
- <view class="weui-panel_hd">留言列表</view>
- <view>
- <block wx:if="{{diaryList.lenght>0}}">
- <navigator class="weui-media-box weui-media-box_text" wx:for="{{diaryList}}" wx:key="diaryItem" url="../detail/detail? objectId={{item.objectId}}&count={{item.count}}">
- <view class="content">留言内容:{{item.content}}</view>
- <view class="info">
- <view class="time">时间:{{item.updatedAt}}</view>
- <view class="count">浏览:{{item.count}}</view>
- <view class="operate">
- <icon type="cancel dels" size="16"></icon>
- <text class="del" catchtap="deleteDiary" data-id="{{item.objectId}}">删除</text>
- <icon type="success edits" size="16"></icon>
- <text catchtap="toModifiyDiary" data-id="{{item.objectId}}" data-content="{{item.content}}" data-title="{{item.title}}">编辑</text>
- </view>
- </view>
- </navigator>
- </block>
- </view>
- </view>
- </scroll-view>
- </view>
- <!-- 添加留言 -->
- <view class="js_dialog" id="androidDialog1" style="opacity: 1;" wx:if="{{writeDiary}}">
- <view class="weui-mask"></view>
- <view class="weui-dialog weui-skin_android">
- <view class="weui-dialog_hd">
- <strong class="weui-dialog_title">添加留言</strong>
- </view>
- <form bindsubmit="addDiary" report-submit="true">
- <view class="weui-dialog_bd">
- <view class="weui-cells_title">标题</view>
- <view class="weui-cells weui-cells_after-title">
- <view class="weui-cell weui-cell_input">
- <view class="weui-cell_bd">
- <input class="weui-input" name="title" placeholder="请输入标题"/>
- </view>
- </view>
- </view>
- <view class="weui-cells_title">留言内容</view>
- <view class="weui-cells weui-cells_after-title">
- <view class="weui-cell">
- <view class="weui-cell_bd">
- <textarea class="weui-textarea" name="content" placeholder="请输入留言内容" style="height: 3.3em;"></textarea>
- <view class="weui-textarea-counter">0/200</view>
- </view>
- </view>
- </view>
- <view class="pic">
- <view class ="pictext"bindtap="uppic">添加图片</view>
- <block wx:if="{isTypeof(url)}">
- <image src="../img/头像.jpg"/>
- </block>
- <block wx:else>
- <image src="{{url}}"/>
- </block>
- </view>
- </view>
- <view class="weui-dialog_ft">
- <view class="weui-dialog_btn weui-dialog_btn_default" bindtap="noneWindows">取消</view>
- <button loading="{{loading}}" class="weui-dialog_btn weui-dialog_btn_primary" form-type="submit">提交</button>
- </view>
- </form>
- </view>
- </view>
- <!-- 修改留言 -->
- <view class="js_dialog" id="androidDialog2" style="opacity: 1;" wx:if="{{modifyDiarys}}">
- <view class="weui-mask"></view>
- <view class="weui-dialog weui-skin_android">
- <view class="weui-dialog_hd">
- <strong class="weui-dialog_title">修改留言</strong>
- </view>
- <form bindsubmit="modifyDiary">
- <view class="weui-dialog_bd">
- <view class="weui-cells_title">标题</view>
- <input class="weui-input" name="title" value="{{nowTitle}}" placeholder="请输入标题"/>
- <view class="weui-cells_title">留言内容</view>
- <view class="weui-cells weui-cells_after-title">
- <view class="weui-cell">
- <view class="weui-cell_bd">
- <textarea class="weui-textarea" name="content" value="{{nowContent}}" placeholder="请输入留言内容" style="height: 3.3em;"></textarea>
- <view class="weui-textarea-counter">0/200</view>
- </view>
- </view>
- </view>
- </view>
- <view class="weui-dialog_ft">
- <view class="weui-dialog_btn weui-dialog_btn_default" bindtap="noneWindows">取消</view>
- <button loading="{{loading}}" class="weui-dialog_btn weui-dialog_btn_primary" form-type="submit">提交</button>
- </view>
- </form>
- </view>
- </view>
index.js代码如下:
- //引入Bmob逻辑文件及初始化数据
- var Bmob = require('../../utils/bmob.js');
- var common = require('../../utils/common.js');
- var app = getApp();
- var that;
- var url = ""
- Page({
- data:{
- writeDiary:false,//写留言
- loading:false,
- windowHeight:0,//定义窗口高度
- windowWidth:0,//定义窗口宽度
- limit:10, //定义数据提取条数
- diaryList:[],//定义数据列表
- modifyDiarys:false
- },
- //获取并显示留言数据
- onShow:function(){
- getList(this);
- wx.getSystemInfo({
- success:(res) => {
- that.setData({
- windowHeight:res.windowHeight,
- windowWidth:res.windowWidth
- })
- }
- })
- /*
- *获取数据*/
- function getList(t,k){
- that =t;
- var Diary = Bmob.Object.extend("test");//数据表 test
- var query = new Bmob.Query(Diary);
- var query1 = new Bmob.Query(Diary);
- query. descending('createdAt'); query.include( "own")//查询所有数据
- query.limit(that.data.limit);
- var mainQuery = Bmob.Query.or(query,query1); mainQuery.find({
- success:function(results){//循环处理查询到的数据
- console.log(results);
- that.setData({
- diaryList:results
- })
- },
- error:function(error){
- console.log("查询失败:"+error.code +"" + error.message);
- }
- });
- }
- },
- //添加数据
- toAddDiary:function(){
- that.setData({
- writeDiary:true
- })
- },
- //添加图片
- uppic:function(){
- var that = this;
- wx.chooseImage({
- count:1,//默认9
- sizeType:['compressed'],//可以指定是原图还是压缩图,默认二者都有
- sourceType:['album','camera'],//可以指定来源是相册还是相机,默认二者都有
- success:function(res){
- var tempFilePaths=res.tempFilePaths;
- if(tempFilePaths.length>0){
- var newDate =new Date();
- var newDateStr=newDate.toLocaleDateString();//获取当前日期做文件主
- var tempFilePath=[tempFilePaths[0]];
- var extension=/\([^.]*)$/.exec(tempFilePath[0]);//获取文件扩展名
- if(extension){
- extension =extension[1].toLowerCase();
- }
- var name =newDateStr+"."+extension;//上传的图片的别名
- var file = new Bmob.File(name,tempFilePaths);
- file.save().then(function(res){
- console.log(res.url());
- url = res.url();
- that.setData({
- url:ur1
- })
- },
- function(error){
- console.log(error);
- }
- )
- }
- }
- })
- },
- //添加留言数据
- addDiary:function(event){
- var title =event.detail.value.title;
- var content=event.detail.value.content;
- var formId =event.detail.formId;
- console.log("event".event)
- if(! title){
- common.showTip("标题不能为空","loading");
- elseif(! content)
- common.showTip("内容不能为空","loading");
- }else
- that.setData({
- loading:true
- })
- var currentUser=Bmob.User.current();
- var User =Bmob.Object.extend("User");var UserModel=newUser();
- //增加留言
- var Diary =Bmob.Object.extend("test");//数据表
- var diary =new Diary();
- diary.set("title",title);保存title字段内容
- diary.set("formId",formId);//保存 formId
- diary.set("content",content);//保存content字段内容
- diary.set("image",url)//保存图片地址
- diary.set("count",1)//保存浏览次数
- if(currentUser){
- UserModel.id =currentUser.id;
- diary.set("own",UserModel);
- }
- //添加数据,第一个入口参数是nu11
- diary.save(null,{
- success:function(result){
- common.showTip('添加日记成功');
- that.setData({
- writeDiary:false,
- loading:false
- })
- var currentUser =Bmob.User.current();
- that.onShow();
- },error:function(result,error){//添加失败
- common.showTip('添加留言失败,请重新发布','loading');
- }
- });
- },
- //删除留言
- deleteDiary:function(event){
- var that =this;
- var objectId=event.target.dataset.id;
- wx.showModal({
- title:'操作提示',
- content:'确定要删除要留言?',
- success:function(res){
- if(res.confirm){
- //删除留言
- var Diary = Bmob.Object.extend("test");
- //创建查询对象,入口参数是对象类的实例
- var query =new Bmob.Query(Diary);
- query.get(objectId,{
- success:function(object){
- //The object was retrieved successfully.
- object.destroy({
- success:function(deleteObject){
- console.log('删除留言成功');
- getList(that)
- },error:function(object,error){
- console.log('删除留言失败');
- }
- });
- },error,function(object,error){
- console.log("query object fail");
- }
- });
- }
- }
- })
- },
- toModifyDiary:function(event){
- var nowTile =event.target.dataset.title;
- var nowContent =event.target.dataset.content;
- var nowId =event.target.dataset.id;
- that.setData({
- modifyDiarys :true,
- nowTitle:nowTile,
- nowContent:nowContent,
- nowId:nowId
- })
- modifyDiary,function(e){
- var t =this;
- modify(t,e)
- function modify(t,e){
- var that = t;//修改日记
- var modyTitle = e.detail.value.title;
- var modyContent = e.detail.value.content;
- var objectId =e.detail.value.content;
- var thatTitle = that.data.nowTitle;
- var thatContent= that.data.nowContent;
- if((modyTitle != thatTitle ||modyContent != thatContent)){
- if(modyTitle == "" ||lmodyContent == ""){
- common.showTip('标题或内容不能为空','1oading');
- }else{
- console.log(modyContent)
- var Diary = Bmob.Object.extend("test");
- var query = new Bmob.Query(Diary);
- //这个id是要修改条目的id,你在生成这个存储并成功时可以获取到,请看前面的文档
- query.get(that.data.nowId,{
- success:function(result){
- //回调中可以取得这个GameScore对象的一个实例,然后就可以修改它了
- result.set('title',modyTitle);
- result.set('content',modyContent);
- result.save();
- common.showTip('留言修改成功','success',function(){
- that.onShow();
- that.setData({
- modifyDiarys:false
- })
- });
- },error:function(object,error){}
- });
- }
- elseif(modyTitle == "" ||lmodyContent == "");{
- common.showTip('标题或内容不能为空','1oading');
- }
- }else{
- that.setData({
- modifyDiarys:false
- })
- common.showTip('修改成功','loading');
- }
- }
- }
- },
- })
index.wxss文件:
- image{
- margin-left: 15%;
- }
- /* 留言列表样式 */
- .weui-panel_hd{
- font-size: 30px;
- text-align: center;
- }
- /* 添加留言样式 */
- .weui-dialog_hd{
- font-size: 25px;
- text-align: center;
- }
- /* 添加留言下面全的的样式 */
- .weui-dialog_bd{
- font-size: 23px;
- }
- /* 输入标题的样式 */
- .weui-input{
- height: 40px;
- border: 3px solid #ccc;
- }
- /* 留言内容样式 */
- .weui-cells_title{
- margin-top: 5px;
- }
- /* 留言内容框样式 */
- .weui-textarea{
- width: 100%;
- border: 3px solid #ccc;
- }
- /* 次数样式 */
- .weui-textarea-counter{
- margin-top: 5px;
- text-align: right;
- }
- /* 添加图片样式 */
- .pictext{
- font-size: 25px;
- text-align: center;
- }
- /* 取消样式 */
- .weui-dialog_ft{
- font-size: 30px;
- text-align: center;
- }
- /* 提交按钮样式 */
- .weui-dialog_ft button{
- font-size: 30px;
- }
detail.wxml代码如下:
- <view class="page">
- <view>
- <view>
- <view>留言主题:</view>
- <view>{{rows.title}}</view>
- <view>
- <view>留言内容:</view>
- <view>{{rows.content}}</view>
- <view class="pic">
- <image src="{{rows.image}}"/>
- </view>
- <view>浏览次数:{{rows.count}}</view>
- <view>创建时间:{{rows.createdAt}}</view>
- </view>
- </view>
- </view>
- <view class="footer">
- <text>Copyright © 2017-2019 www.smartbull.cn</text>
- </view>
- </view>
detail.js代码如下:
- varBmob =require('../../utils/bmob');
- Page({
- data:{
- rows:{}//留言详情
- },
- onLoad:function(e){
- //页面初始化options为页面跳转所带来的参数
- console.log(e.objectId)
- var objectId=e.objectId;
- var newcount=e.count;
- var that =this;
- var Diary = Bmob.Object.extend("test");
- var query = new Bmob.Query(Diary);
- query.get(objectId,{
- success:function(result){
- console.log(result);
- that.setData({
- rows:result,
- })
- newcount =parseInt(newcount)+1//浏览次数加1
- result.set("count",newcount)//保存浏览次数
- result.save()
- },
- error:function(result,error){
- console.log("查询失败");
- }
- });
- }
- })
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