js上传图片

作者: world_7735 | 来源:发表于2019-03-07 10:57 被阅读8次

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js图片上传
js上传图片
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<!DOCTYPE html>
<html>

<head>
  <meta charset="utf-8">
  <title>layui</title>
  <meta name="renderer" content="webkit">
  <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
  <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
  <link rel="stylesheet" href="./css/reset.css" media="all">
  <!-- <link rel="stylesheet" href="./css/index.css" media="all"> -->
  <script src="./js/jquery-1.9.1.min.js" charset="utf-8"></script>
  <!-- <script src="./js/lib/mavatar.js" charset="utf-8"></script> -->
  <style>
    .home_tabs_cupNoraml {
    width: 200px;
    height: 200px;
    margin: 10px auto 0px auto;
    border: 1px solid black;
  text-align: center;
  position: relative;
}
.prompt3_pic {
    width: 100%;
    height: 100%;
    text-align: center;
    position: relative;
}
.imgSpan_pic {
  background: url("https://static.98ep.com/Img/printChina/zhan_t.png")  center center no-repeat;
  background-size:100%; 
  display: block;
  width: 100%;
    height: 100%;
}
.filepath_pic {
    width: 100%;
    height: 100%;
  opacity: 0;
  z-index: 1;
  position: absolute;
  top:0;
  left: 0;

}
.img3_pic {
    height: 100%;
    width: 100%;
    display: none;
}
.btn_pic{
  position: absolute;
    left: 0px;
    top: 50%;
    border: 1px solid #bbb;
    color: #fff;
    background-color: #2db7f5;
    line-height: 20px;
    border-color: #2db7f5;
    padding: 3px 9px;
}
  </style>
</head>

<body>

  <div class="home_tabs_cupNoraml">
    <div class="prompt3_pic">
      <span class="imgSpan_pic">
      </span>
      <input type="file" class="filepic filepath_pic" onchange="changepic(this,0)" accept="image/jpg,image/jpeg,image/png,image/PNG">
      <!--当vaule值改变时执行changepic函数，规定上传的文件只能是图片-->
    </div>
    <img src="#" class="img3_pic" />
    <button class="btn_pic">重置</button>

  </div>
  <div class="home_tabs_cupNoraml">
    <div class="prompt3_pic">
      <span class="imgSpan_pic">
      </span>
      <input type="file" class="filepic filepath_pic" onchange="changepic(this,1)" accept="image/jpg,image/jpeg,image/png,image/PNG">
      <!--当vaule值改变时执行changepic函数，规定上传的文件只能是图片-->
    </div>
    <img src="#" class="img3_pic" />
    <button class="btn_pic" >重置</button>
  </div>
</body>

</html>
<script>
  function changepic(self, len) {
    for (var i = 0; i < $(".home_tabs_cupNoraml").length; i++) {
      if (i == len) {
        $(".prompt3_pic").eq(len).css("display", "none");
        var reads = new FileReader();
        f = document.querySelectorAll('.filepic')[len].files[0];
        reads.readAsDataURL(f);
        reads.onload = function (e) {
          document.querySelectorAll('.img3_pic')[len].src = this.result;
          $(".img3_pic").eq(len).css("display", "block");
        };
      } else if (i == len) {
        $(".prompt3_pic").eq(len).css("display", "none");
        var reads = new FileReader();
        f = document.querySelectorAll('.filepic')[len].files[0];
        reads.readAsDataURL(f);
        reads.onload = function (e) {
          document.querySelectorAll('.img3_pic')[len].src = this.result;
          $(".img3_pic").eq(len).css("display", "block");
        };
      }
    }
  }
  $(".btn_pic").click(function () {
    var len = $(this).parents(".home_tabs_cupNoraml").index();
    console.log(len);
    for (var j = 0; j < $(".home_tabs_cupNoraml").length; j++) {
      $(".prompt3_pic").eq(len).css("display", "block");
      $(".img3_pic").eq(len).css("display", "none");
    }
  });
</script>