<template>
 <h5 class="content-header">图片列表</h5>
 <div class="image-list">
 <div class="list-default-img" v-show="isPhoto" @click.stop="addPic">
  <img src="./images/icon_photo.png" />
  <span>请选择或者拍照上传照片</span>
  <input type="file" accept="image/jpeg,image/jpg,image/png" capture="camera" @change="onFileChange" style="display: none;">
 </div>
 <ul class="list-ul" v-show="!isPhoto">
  <li class="list-li" v-for="(iu, index) in imgUrls">
  <a class="list-link" @click='previewImage(iu)'>
   <img :src="iu">
  </a>
  <span class="list-img-close" @click='delImage(index)'></span>
  </li>
  <li class="list-li-add">
  <span class="add-img" @click.stop="addPic"></span>
  </li>
 </ul>
 </div>
  <div class="add-preview" v-show="isPreview" @click="closePreview">
 <img :src="previewImg">
 </div>
 
</template>

<script>

 export default {
 data: function () {
  return {
  imgUrls: [],
  urlArr: [],
  isPhoto: true,
  btnTitle: '',
  isModify: false,
  previewImg:'',
  isPreview: false
  }
 },
 watch: {
  imgUrls: 'toggleAddPic'
 },
 methods: {
  toggleAddPic: function() {
  let vm = this;
  if(vm.imgUrls.length >= 1) {
   vm.isPhoto = false;
  } else {
   vm.isPhoto = true;
  }
  },
  addPic: function(e) {
  let vm = this;
  $('input[type=file]').trigger('click');
  return false;
  },
  onFileChange: function(e) {
  var files = e.target.files || e.dataTransfer.files;
  if(!files.length) return;
  this.createImage(files, e);
  },
  createImage: function(file, e) {
  let vm = this;
  lrz(file[0], { width: 480 }).then(function(rst) {
   vm.imgUrls.push(rst.base64);
   return rst;
  }).always(function() {
  // 清空文件上传控件的值
  e.target.value = null;
  });
  },
  delImage: function(index) {
  let vm = this;
  let btnArray = ['取消', '确定'];
  mui.confirm('确定删除该图片?','提示', btnArray, function(e) {
   if (e.index == 1) {
   vm.imgUrls.splice(index, 1);
   }
  })

  },
  previewImage: function(url){
  let vm = this;
  vm.isPreview = true;
  vm.previewImg = url;
  },
  closePreview: function(){
  let vm = this;
  vm.isPreview = false;
  vm.previewImg = "";
  },
  saveImage: function(){
  let vm = this;
  let urlArr = [],
  imgUrls = this.imgUrls;

  for(let i = 0; i < imgUrls.length; i++) {
   if(imgUrls[i].indexOf('file') == -1) {
   urlArr.push(imgUrls[i].split(',')[1]);
   } else {
   urlArr.push(imgUrls[i]);
   }
  }

  //数据传输操作
  }
 }
 }
 
</script>

lrz(file[0], { width: 480 }).then(function(rst) {
   vm.imgUrls.push(rst.base64);
   return rst;
  }).always(function() {
  // 清空文件上传控件的值
  e.target.value = null;
  });
lrz(file, [options]);

// 清空文件上传控件的值
 e.target.value = null;

delImage: function(index) {
  let vm = this;
  let btnArray = ['取消', '确定'];
  mui.confirm('确定删除该图片?','提示', btnArray, function(e) {
   if (e.index == 1) {
   vm.imgUrls.splice(index, 1);
   }
  })

  }

saveImage: function(){
  let vm = this;
  let urlArr = [],
  imgUrls = this.imgUrls;

  for(let i = 0; i < imgUrls.length; i++) {
   if(imgUrls[i].indexOf('file') == -1) {
   urlArr.push(imgUrls[i].split(',')[1]);
   } else {
   urlArr.push(imgUrls[i]);
   }
  }

  //数据传输操作
  }

[HttpPost]
    public ActionResult MUploadImgBase64Str(string base64str)
    {
      try
      {
        var imgData = base64str;
        //过滤特殊字符即可  
        string dummyData = imgData.Trim().Replace("%", "").Replace(",", "").Replace(" ", "+");
        if (dummyData.Length % 4 > 0)
        {
          dummyData = dummyData.PadRight(dummyData.Length + 4 - dummyData.Length % 4, '=');
        }
        byte[] byteArray = Convert.FromBase64String(dummyData);
        using (System.IO.MemoryStream ms = new System.IO.MemoryStream(byteArray))
        {
          var img = System.Drawing.Image.FromStream(ms);

          var path = "~/Content/UploadFiles/mobile/";
          var uploadpath = Server.MapPath(path);
          if (!Directory.Exists(uploadpath))
          {
            Directory.CreateDirectory(uploadpath);
          }
          var saveName = uploadpath + “stoneniqiu” + ".jpg";
          img.Save(saveName);
          return Json(saveName);
        }
      }
      catch (Exception e)
      {
        return Json(e.Message);

      }
    }