微信小程序仿朋友圈发布动态功能

仿照微信朋友圈做了一个界面如下，先看效果：

1、点开界面

2、选择图片

3、点击上传

4、动态显示

第一个页面的wxml：

<view class='page'>
<textarea class='text' bindinput="input" placeholder="分享动态" auto-height/>
<view class="image_content">
<view class='image' wx:for="{{img_url}}">
 <image class="moment_img" src="{{item}}"></image>
</view>
<view class='image' style='display:{{hideAdd?"none":"block"}}'>
 <image bindtap="chooseimage" class="moment_img" src='../../images/add.jpg'></image>
</view>
</view>
<button bindtap="send" style='margin-right:5px;margin-left:5px'>发布</button>
</view>

第一个页面的wcss：

.page{
padding: 20px
}
.text{
width: 100％;
margin-bottom: 40px;
font-size: 20px;
padding: 5px
}
.image{
width:31％;
height: 100px;
padding: 2px
}
.moment_img{
width: 98px;
height: 98px;
}
.image_content{
width: 100％;
display: flex;
flex-wrap: wrap;
margin-bottom: 20px
}

第一个页面的js：

Page({
data: {
img_url: [],
content:''
},
onLoad: function (options) {
},
input:function(e){
this.setData({
 content:e.detail.value
})
},
chooseimage:function(){
var that = this;
wx.chooseImage({
 count: 9, // 默认9
 sizeType: ['original', '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) {
 if (res.tempFilePaths.length>0){
  //图如果满了9张，不显示加图
  if (res.tempFilePaths.length == 9){
  that.setData({
   hideAdd:1
  })
  }else{
  that.setData({
   hideAdd: 0
  })
  }
  //把每次选择的图push进数组
  let img_url = that.data.img_url;
  for (let i = 0; i < res.tempFilePaths.length; i++) {
  img_url.push(res.tempFilePaths[i])
  }
  that.setData({
  img_url: img_url
  })
 }
 }
})
},
//发布按钮事件
send:function(){
var that = this;
var user_id = wx.getStorageSync('userid')
wx.showLoading({
 title: '上传中',
})
that.img_upload()
},
//图片上传
img_upload: function () {
let that = this;
let img_url = that.data.img_url;
let img_url_ok = [];
//由于图片只能一张一张地上传，所以用循环
for (let i = 0; i < img_url.length; i++) {
 wx.uploadFile({
 //路径填你上传图片方法的地址
 url: 'http://wechat.homedoctor.com/Moments/upload_do',
 filePath: img_url[i],
 name: 'file',
 formData: {
  'user': 'test'
 },
 success: function (res) {
  console.log('上传成功');
  //把上传成功的图片的地址放入数组中
  img_url_ok.push(res.data)
  //如果全部传完，则可以将图片路径保存到数据库
  if (img_url_ok.length == img_url.length) {
  var userid = wx.getStorageSync('userid');
  var content = that.data.content;
  wx.request({
   url: 'http://wechat.homedoctor.com/Moments/adds',
   data: {
   user_id: userid,
   images: img_url_ok,
   content: content,
   },
   success: function (res) {
   if (res.data.status == 1) {
    wx.hideLoading()
    wx.showModal({
    title: '提交成功',
    showCancel: false,
    success: function (res) {
     if (res.confirm) {
     wx.navigateTo({
      url: '/pages/my_moments/my_moments',
     })
     }
    }
    })
   }
   }
  })
  }
 },
 fail: function (res) {
  console.log('上传失败')
 }
 })
}
}
})

我认为难点在于请求后台上传图片的方法，虽然我也没搞懂，不过直接使用，他会返回放在服务器的哪个位置，代码如下：

public function upload_do(){
 extract(generateRequestParamVars());
 /**
  * upload.php
  *
  * Copyright 2013, Moxiecode Systems AB
  * Released under GPL License.
  *
  * License: http://www.plupload.com/license
  * Contributing: http://www.plupload.com/contributing
  */
 #!! IMPORTANT:
 #!! this file is just an example, it doesn't incorporate any security checks and
 #!! is not recommended to be used in production environment as it is. Be sure to
 #!! revise it and customize to your needs.
 // Make sure file is not cached (as it happens for example on iOS devices)
 header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
 header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
 header("Cache-Control: no-store, no-cache, must-revalidate");
 header("Cache-Control: post-check=0, pre-check=0", false);
 header("Pragma: no-cache");
 echo $fileName;
 // Support CORS
 // header("Access-Control-Allow-Origin: *");
 // other CORS headers if any...
 if ($_SERVER['REQUEST_METHOD'] == 'OPTIONS') {
  exit; // finish preflight CORS requests here
 }
 if ( !empty($_REQUEST[ 'debug' ]) ) {
  $random = rand(0, intval($_REQUEST[ 'debug' ]) );
  if ( $random === 0 ) {
   header("HTTP/1.0 500 Internal Server Error");
   exit;
  }
 }
 // header("HTTP/1.0 500 Internal Server Error");
 // exit;
 // 5 minutes execution time
 @set_time_limit(5 * 60);
 // Uncomment this one to fake upload time
 usleep(5000);
 // Settings
 // $targetDir = ini_get("upload_tmp_dir") . DIRECTORY_SEPARATOR . "plupload";
 $targetDir = C('CACHE_DIR').DIRECTORY_SEPARATOR.'Uploads'.DIRECTORY_SEPARATOR.'Tmps';
 $uploadDir = C('CACHE_DIR').DIRECTORY_SEPARATOR.'Uploads'.DIRECTORY_SEPARATOR.'Tmps'.DIRECTORY_SEPARATOR.date('Y').DIRECTORY_SEPARATOR.date('m').DIRECTORY_SEPARATOR.date('d');
 $uploadUrl = '/Uploads/Tmps/'.date('Y').'/'.date('m').'/'.date('d');
 //创建文件夹
 if(!is_dir($uploadDir)){
  @mkdir($uploadDir,0777,true);
 }
 $cleanupTargetDir = true; // Remove old files
 $maxFileAge = 5 * 3600; // Temp file age in seconds
 // Create target dir
 if (!file_exists($targetDir)) {
  @mkdir($targetDir);
 }
 // Create target dir
 if (!file_exists($uploadDir)) {
  @mkdir($uploadDir);
 }
 // Get a file name
 if (isset($_REQUEST["name"])) {
  $fileName = $_REQUEST["name"];
 } elseif (!empty($_FILES)) {
  $fileName = $_FILES["file"]["name"];
 } else {
  $fileName = uniqid();
 }
 //$fileName = uniqid("file_").'.'.pathinfo($fileName, PATHINFO_EXTENSION);
 $extension=pathinfo($fileName, PATHINFO_EXTENSION);
 if($extension){
  $fileName = uniqid().'.'.$extension;
 }else{
  $fileName = uniqid();
 }
 $md5File = @file('md5list.txt', FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
 $md5File = $md5File ? $md5File : array();
 if (isset($_REQUEST["md5"]) && array_search($_REQUEST["md5"], $md5File ) !== FALSE ) {
  die('{"jsonrpc" : "2.0", "result" : null, "id" : "id", "exist": 1}');
 }
 $filePath = $targetDir . DIRECTORY_SEPARATOR . $fileName;
 $uploadPath = $uploadDir . DIRECTORY_SEPARATOR . $fileName;
 // Chunking might be enabled
 $chunk = isset($_REQUEST["chunk"]) ? intval($_REQUEST["chunk"]) : 0;
 $chunks = isset($_REQUEST["chunks"]) ? intval($_REQUEST["chunks"]) : 1;
 // echo $_REQUEST["chunks"];
 // echo $_REQUEST["chunk"];
 // Remove old temp files
 if ($cleanupTargetDir) {
  if (!is_dir($targetDir) || !$dir = opendir($targetDir)) {
   die('{"jsonrpc" : "2.0", "error" : {"code": 100, "message": "Failed to open temp directory."}, "id" : "id"}');
  }
  while (($file = readdir($dir)) !== false) {
   $tmpfilePath = $targetDir . DIRECTORY_SEPARATOR . $file;
   // If temp file is current file proceed to the next
   if ($tmpfilePath == "{$filePath}_{$chunk}.part" || $tmpfilePath == "{$filePath}_{$chunk}.parttmp") {
    continue;
   }
   // Remove temp file if it is older than the max age and is not the current file
   if (preg_match('/\.(part|parttmp)$/', $file) && (@filemtime($tmpfilePath) < time() - $maxFileAge)) {
    @unlink($tmpfilePath);
   }
  }
  closedir($dir);
 }
 // Open temp file
 if (!$out = @fopen("{$filePath}_{$chunk}.parttmp", "wb")) {
  die('{"jsonrpc" : "2.0", "error" : {"code": 102, "message": "Failed to open output stream."}, "id" : "id"}');
 }
 if (!empty($_FILES)) {
  if ($_FILES["file"]["error"] || !is_uploaded_file($_FILES["file"]["tmp_name"])) {
   die('{"jsonrpc" : "2.0", "error" : {"code": 103, "message": "Failed to move uploaded file."}, "id" : "id"}');
  }
  // Read binary input stream and append it to temp file
  if (!$in = @fopen($_FILES["file"]["tmp_name"], "rb")) {
   die('{"jsonrpc" : "2.0", "error" : {"code": 101, "message": "Failed to open input stream."}, "id" : "id"}');
  }
 } else {
  if (!$in = @fopen("php://input", "rb")) {
   die('{"jsonrpc" : "2.0", "error" : {"code": 101, "message": "Failed to open input stream."}, "id" : "id"}');
  }
 }
 while ($buff = fread($in, 4096)) {
  fwrite($out, $buff);
 }
 @fclose($out);
 @fclose($in);
 rename("{$filePath}_{$chunk}.parttmp", "{$filePath}_{$chunk}.part");
 $index = 0;
 $done = true;
 for( $index = 0; $index < $chunks; $index++ ) {
  if ( !file_exists("{$filePath}_{$index}.part") ) {
   $done = false;
   break;
  }
 }
 if ( $done ) {
  if (!$out = @fopen($uploadPath, "wb")) {
   die('{"jsonrpc" : "2.0", "error" : {"code": 102, "message": "Failed to open output stream."}, "id" : "id"}');
  }
  if ( flock($out, LOCK_EX) ) {
   for( $index = 0; $index < $chunks; $index++ ) {
    if (!$in = @fopen("{$filePath}_{$index}.part", "rb")) {
     break;
    }
    while ($buff = fread($in, 4096)) {
     fwrite($out, $buff);
    }
    @fclose($in);
    @unlink("{$filePath}_{$index}.part");
   }
   flock($out, LOCK_UN);
  }
  @fclose($out);
 }
 // Return Success JSON-RPC response
 //die('{"jsonrpc" : "2.0", "result" : null, "id" : "id"}');
 die($uploadUrl .'/'. $fileName);
}

这个函数会将图片保存到项目文件的Cache目录的Upload/....什么什么的目录下。而且也返回了这个完整路径跟前端，前端拿着这个再去请求后台接口保存这个路径。保存图片的后台代码如下：

首先是控制层：

public function adds()
{
 try{
  D(self::$MOMENTS_MODEL)->adds();
  $ajaxReturnData['status'] = 1;
  $ajaxReturnData['message'] = 'success';
 }catch (\Exception $e){
  $ajaxReturnData['status'] = 0;
  $ajaxReturnData['message'] = 'fail';
 }
 $this->ajaxReturn($ajaxReturnData);
}

然后是模型层：（我之前犯傻的是，应该直接把数组，也就是$images直接保存进去就行了，不用json_encode()）

public function adds()
{
 extract(generateRequestParamVars());
 $user = D(self::$WECHAT_USER)->find($user_id);
 $data = [];
 $data['user_id'] = $user_id;
 $data['user_name'] = $user['nickname'];
 $data['user_img'] = $user['imageurl'];
 $data['content'] = $content;
 $data['images'] = $images;
 $data['create_time'] = time();

if ($this->add($data) === false) {
  throw new \Exception('OPERATION_FAILED');
 }
}

保存好了之后，接下来如何在前端中显示图片呢？关键在于保存图片数组到数据库里，如何让它取出来的时候转为数组。代码如下：

控制层：

public function my_moments()
{
 try{
  $data = D(self::$MOMENTS_MODEL)->my_moments();
  $ajaxReturnData['status'] = 1;
  $ajaxReturnData['message'] = 'success';
  $ajaxReturnData['data'] = $data;
 }catch (\Exception $e){
  $ajaxReturnData['status'] = 0;
  $ajaxReturnData['message'] = 'fail';
 }
 $this->ajaxReturn($ajaxReturnData);
}

模型层：（这里使用了json_decode($array,true)方法，打印出来就是数组了）

public function my_moments()
{
 extract(generateRequestParamVars());
 $user = D(self::$WECHAT_USER)->find($user_id);
 if($user['is_doctor'] == 1){
  $conditions = [];
  $conditions['user_id'] = $user_id;
  $doctor = D(self::$DOCTOR_MODEL)->where($conditions)->find();
  $identity = $doctor['hospital']. "" . $doctor['grade'];
 }else{
  $identity = '';
 }
 $conditions = [];
 $conditions['user_id'] = $user_id;
 $moments = $this->where($conditions)->order('create_time desc')->select();
 for($i = 0 ; $i < count($moments) ; $i ++){
  $moments[$i]['images'] = json_decode($moments[$i]['images'],true);
 }
 $data = [];
 $data[0] = $user;
 $data[1] = $moments;
 $data[2] = $identity;
 return $data;
}

最后，动态页面如何显示图片呢？

主要我还在做九宫格图片的适配，就不贴代码了，主要是图片src需要加前缀，也就是你的域名。这样就能显示出来啦~

<image class="moment_img" src="http://wechat.homedoctor.com{{image}}"></image>

不相信你能看到最后，哈哈~我写的太多了

总结

以上所述是小编给大家介绍的微信小程序仿朋友圈发布动态界面，希望对大家有所帮助，如果大家有任何疑问欢迎给我留言，小编会及时回复大家的！

来源：https://blog.csdn.net/qq_33514421/article/details/81034976