zoukankan      html  css  js  c++  java
  • js的几个库

    http://www.w3.org/TR/FileAPI/

    http://www.w3.org/TR/html-media-capture/

    demo:http://jsfiddle.net/pmatseykanets/R99NY/

     1 <!DOCTYPE html>
     2 <html>
     3 <head>
     4     <title>jQM input file capture</title>
     5     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     6     <link rel="stylesheet" href="http://code.jquery.com/mobile/1.3.0/jquery.mobile-1.3.0.min.css" />
     7     <script src="http://code.jquery.com/jquery-1.8.2.min.js"></script>
     8     <script src="http://code.jquery.com/mobile/1.3.0/jquery.mobile-1.3.0.min.js"></script>
     9 </head>
    10 <body>
    11 
    12     <div data-role="page" id="page">
    13         <style>
    14             #preview {
    15                 width: 80%; max-width: 300px;
    16             }
    17             #preview img {
    18                 width: 100%;
    19             }
    20             .hiddenfile {
    21              width: 0px;
    22              height: 0px;
    23              overflow: hidden;
    24             }
    25         </style>
    26         <div data-role="header">
    27              <h3>Header</h3>
    28         </div>
    29         <div data-role="content">
    30             <button id="chooseFile">Choose file</button>
    31             <div class="hiddenfile">
    32               <input type="file"  data-clear-btn="false" name="image" accept="image/*" capture>
    33             </div>
    34             <div id="preview">
    35             </div>
    36             <ul id="info" data-role="listview" data-inset="true">
    37             </ul>
    38         </div>
    39 
    40     </div>
    41 
    42     <script>
    43     $('#page').on('pageinit', function(){
    44         $("#chooseFile").click(function(e){
    45             e.preventDefault();
    46             $("input[type=file]").trigger("click");
    47         });
    48         $("input[type=file]").change(function(){
    49             var file = $("input[type=file]")[0].files[0];            
    50             $("#preview").empty();
    51             displayAsImage3(file, "preview");
    52             
    53             $info = $("#info");
    54             $info.empty();
    55             if (file && file.name) {
    56                 $info.append("<li>name:<span>" + file.name + "</span></li>");
    57             }
    58             if (file && file.type) {
    59                 $info.append("<li>size:<span>" + file.type + " bytes</span></li>");
    60             }
    61             if (file && file.size) {
    62                 $info.append("<li>size:<span>" + file.size + " bytes</span></li>");
    63             }
    64             if (file && file.lastModifiedDate) {
    65                 $info.append("<li>lastModifiedDate:<span>" + file.lastModifiedDate + " bytes</span></li>");
    66             }
    67             $info.listview("refresh");
    68         });
    69     });
    70 
    71     function displayAsImage3(file, containerid) {
    72         if (typeof FileReader !== "undefined") {
    73             var container = document.getElementById(containerid),
    74                 img = document.createElement("img"),
    75                 reader;
    76             container.appendChild(img);
    77             reader = new FileReader();
    78             reader.onload = (function (theImg) {
    79                 return function (evt) {
    80                     theImg.src = evt.target.result;
    81                 };
    82             }(img));
    83             reader.readAsDataURL(file);
    84         }
    85     }
    86     
    87     </script>
    88 </body>
    89 </html>
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  • 原文地址:https://www.cnblogs.com/debugzer0/p/5044149.html
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