利用微信的weui框架上传、预览和删除图片

jQuery WeUI 是专为微信公众账号开发而设计的一个框架，jQuery WeUI的官网：http://jqweui.com/

需求：需要在微信公众号网页添加上传图片功能

技术选型：实现上传图片功能可选百度的WebUploader、饿了么的Element和微信的jQuery WeUI，WebUploader的缺点是自定义UI困难，自定义上传过程困难，Element的缺点是Web 控件，与手机端样式不符，而jQuery WeUI专门为微信公众号做的框架，基本不会出现问题，使用起来比较简单。最后当然就选微信的jQuery WeUI

HTML部分：

[html] view plaincopy
<!--图片上传-->  
        <div class="weui-gallery" id="gallery">  
            <span class="weui-gallery__img" id="galleryImg"></span>  
            <div class="weui-gallery__opr">  
                <a href="javascript:" class="weui-gallery__del">  
                    <i class="weui-icon-delete weui-icon_gallery-delete"></i>  
                </a>  
            </div>  
        </div>  
        <div class="weui-cells weui-cells_form">  
            <div class="weui-cell">  
                <div class="weui-cell__bd">  
                    <div class="weui-uploader">  
                        <div class="weui-uploader__hd">  
                            <p class="weui-uploader__title">图片上传</p>  
                        </div>  
                        <div class="weui-uploader__bd">  
                            <ul class="weui-uploader__files" id="uploaderFiles">  
                                  
                            </ul>  
                            <div class="weui-uploader__input-box">  
                                <input id="uploaderInput" class="weui-uploader__input zjxfjs_file" type="file" accept="image/*" multiple="">  
                            </div>  
                        </div>  
                    </div>  
                </div>  
            </div>  
        </div>  

JS部分：

[html] view plaincopy
<script type="text/javascript" src="../js/mui.min.js"></script>  
<script type="text/javascript" src="../js/jquery.min.js"></script>  
<script src="../js/jquery-weui.min.js"></script>  
<script>  
    mui.init();  
    $(function() {  
        var tmpl = '<li class="weui-uploader__file" style="background-image:url(#url#)"></li>',  
            $gallery = $("#gallery"),  
            $galleryImg = $("#galleryImg"),  
            $uploaderInput = $("#uploaderInput"),  
            $uploaderFiles = $("#uploaderFiles");  
  
            $uploaderInput.on("change", function(e) {  
                var src, url = window.URL || window.webkitURL || window.mozURL,  
                files = e.target.files;  
                for(var i = 0, len = files.length; i < len; ++i) {  
                    var file = files[i];  
  
                    if(url) {  
                        src = url.createObjectURL(file);  
                    } else {  
                        src = e.target.result;  
                    }  
  
                    $uploaderFiles.append($(tmpl.replace('#url#', src)));  
                }  
            });  
        var index; //第几张图片  
        $uploaderFiles.on("click", "li", function() {  
            index = $(this).index();  
            $galleryImg.attr("style", this.getAttribute("style"));  
            $gallery.fadeIn(100);  
        });  
        $gallery.on("click", function() {  
            $gallery.fadeOut(100);  
        });  
        //删除图片  
        $(".weui-gallery__del").click(function() {  
            $uploaderFiles.find("li").eq(index).remove();  
        });  
    });  
</script>  

CSS和JS文件可以去官网下载

[html] view plaincopy
<link rel="stylesheet" href="../css/mui.min.css">  
<link rel="stylesheet" href="../css/weui.min.css"/>  
<link rel="stylesheet" href="../css/jquery-weui.min.css"/>  

[html] view plaincopy
 <script type="text/javascript" src="../js/mui.min.js"></script>  
 <script type="text/javascript" src="../js/jquery.min.js"></script>  
 <script src="../js/jquery-weui.min.js"></script>  