js 上传图片

没有特别的幸运，那么就特别的努力！！！

既然没有优人的天赋，那就拼吧！
先看下效果：
在这里插入图片描述
二话不说，直接上代码
为了方便代码直接放一个页面

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
    body{
        background: #ebeef5;
        font-size: 0.18rem;
    }
    .header{
        position: fixed;
        top: 0;
        left: 0;
        width: 7.5rem;
        height: 1.27rem;
        line-height: 1.27rem;
        background-color: #4188f2;
        display: flex;
        justify-content: space-between;
        font-size: 0.36rem;
        color: #fff;
        padding:0 20px;
        z-index: 9;
    }
    .header img{
        margin-top:0.4rem;
    }
    .fh{
        width: 0.22rem;
        height: 0.4rem;
    }
    .tianjia{
        width: 0.38rem;
        height: 0.38rem;
    }
    .top{
        width: 100%;
        height:1.27rem ;
    }
    .content{
        margin:0.2rem;
        padding-bottom: 1.8rem;
        background: #fff;
        border-radius: 0.1rem;
    } 
    .out-main-top{
        display: flex;
    }
    .canvas-img {
        margin-top:0.2rem;
        clear: both;
    }
    .canvas-img li{
        width:1.5rem;
        height:1.5rem;
        position: relative;
        border:0.01rem solid #ccc;
        cursor: pointer;
        float: left;
        margin-left:0.2rem;
        margin-bottom: 0.2rem;
        overflow: hidden;
    }
    
    .canvas-img li img {
        width:90%;
        position: absolute;
        left:50%;
        top:50%;
        transform: translate(-50%,-50%);
    }
    .canvas-img li .close {
        position: absolute;
        right: 0.04rem;
        top: 0.01rem;
        font-style: normal;
        font-size: 0.12rem;
        color: #666;
    }
    .add-pic-box {
        margin: 0.2rem;
        width: 1.5rem;
        height: 1.5rem;
        border: 1px dashed #999;
        border-radius: 4px;
        cursor: pointer;
        background: #fff url(../images/sc.png) center center no-repeat;
    }
    </style>
</head>
<body>
    <div class="app">
        
        <div class="header">
            <img class="fh" src="../images/FH.png" alt="">
            <div>上传图片</div>
            <div></div>
        </div>

        <div class="top"></div>
        <div class="content">

            <!-- 图片上传 -->
            <div class="out-main-top">
                <div class="add-pic-box" id='addPicBox'>
                    <input type="file" name="pic[]" multiple id="myinput" onchange="uploadFile()" style="display: none" >   
                </div>
                <ul id="canvasImg" class="canvas-img"></ul>
             </div>
              

            <div class="twoBtn">
                <button class="qxBtn">取消</button>
                <button class="qxBtn btnActive" onclick="uploadFileNow()">上传</button>
            </div>
        </div>


    </div>

    <script>
        //转换rem
        document.documentElement.style.fontSize =
            document.documentElement.clientWidth / 7.5 + "px";
        window.addEventListener(
            "resize",
            function () {
            document.documentElement.style.fontSize =
                document.documentElement.clientWidth / 7.5 + "px";
            },
            false
        ); 

        //图片上传
        var myinput =  document.getElementById('myinput');
        var canvasImg = document.getElementById('canvasImg');

        var allBaseImg=[]; //需要给到后台的图片数据
        var AllowImgFileSize = 1024 * 400; //上传图片最大值(单位字节)超过400K上传失败

      document.getElementById('addPicBox').addEventListener('click',function(ev){
            myinput.click();
      })
      function uploadFile(){
          var files = myinput.files;
          //处理图片
          transferBase(files);
      }
      function transferBase(files){
          for(var i=0,len=files.length;i<len;i++) {
            var file = files[i];
            var reader = new FileReader(); //读取文件
            //用于图片显示
            reader.readAsDataURL(file);

            //ArrayBuffer
            // reader.readAsArrayBuffer(file);
            reader.onload = function(e){
              var base64 = e.target.result;

              var index = allBaseImg.indexOf(base64);
              if(index!=-1) {
                console.log('图片已经上传过了！');
                return;
              }

              var str = `<li><img src="${base64}"><i class="close">X</i></li>`;
              // var str = '<li><img src="'+base64+'"><i class="close">X</i></li>';
              canvasImg.innerHTML += str;
              allBaseImg.push(base64);
            }

          }
      }

      canvasImg.addEventListener('click',function(ev){
          var target = ev.target;
          if(target.className=='close'){
              var thisbase = target.offsetParent.querySelector('img').getAttribute('src');
              var index =  allBaseImg.indexOf(thisbase);
              allBaseImg.splice(index,1);
              target.offsetParent.remove()
          }
      })

      function uploadFileNow(){
        //调接口
        console.log(allBaseImg);
      }

    </script>

</body>
</html>

希望能帮助到大家，同时祝愿大家在开发旅途中愉快！！！

没有特别的幸运，那么就特别的努力！！！

拿着不谢请叫我“锤” ！！！

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js 上传图片

没有特别的幸运，那么就特别的努力！！！

拿着 不谢 请叫我“锤” ！！！

猜你喜欢

拿着不谢请叫我“锤” ！！！