JS 手機端多張圖片上傳

時間  2020-05-22
標籤 手機 圖片 上傳 欄目 JavaScript 简体版
原文   原文鏈接

代碼以下javascript

<!DOCTYPE html>
<html lang="zh-cn">

<head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <title>多圖片上傳</title>

    <style> * { margin: 0; padding: 0;
        }
        /*圖片上傳*/ html, body { width: 100%; height: 100%;
        } .container { width: 100%; height: 100%; overflow: auto; clear: both;
        } .z_photo { width: 5rem; height: 5rem; padding: 0.3rem; overflow: auto; clear: both; margin: 1rem auto; border: 1px solid #555;
        } .z_photo img { width: 1rem; height: 1rem;
        } .z_addImg { float: left; margin-right: 0.2rem;
        } .z_file { width: 1rem; height: 1rem; background: url(z_add.png) no-repeat; background-size: 100% 100%; float: left; margin-right: 0.2rem;
        } .z_file input::-webkit-file-upload-button { width: 1rem; height: 1rem; border: none; position: absolute; outline: 0; opacity: 0;
        } .z_file input#file { display: block; width: auto; border: 0; vertical-align: middle;
        }
        /*遮罩層*/ .z_mask { width: 100%; height: 100%; background: rgba(0, 0, 0, .5); position: fixed; top: 0; left: 0; z-index: 999; display: none;
        } .z_alert { width: 3rem; height: 2rem; border-radius: .2rem; background: #fff; font-size: .24rem; text-align: center; position: absolute; left: 50%; top: 50%; margin-left: -1.5rem; margin-top: -2rem;
        } .z_alert p:nth-child(1) { line-height: 1.5rem;
        } .z_alert p:nth-child(2) span { display: inline-block; width: 49%; height: .5rem; line-height: .5rem; float: left; border-top: 1px solid #ddd;
        } .z_cancel { border-right: 1px solid #ddd;
        }

    </style>
</head>

<body>

    <div class="container">
        <!-- 照片添加 -->
        <div class="z_photo">
            <div class="z_file">
                <input type="file" name="file" id="file" value="" accept="image/*" multiple onchange="imgChange('z_photo','z_file');" />

            </div>

        </div>

        <!--遮罩層-->
        <div class="z_mask">
            <!--彈出框-->
            <div class="z_alert">
                <p>肯定要刪除這張圖片嗎？</p>
                <p>
                    <span class="z_cancel">取消</span>
                    <span class="z_sure">肯定</span>
                </p>
            </div>
        </div>
    </div>


    <script type="text/javascript">
        //px轉換爲rem
 (function(doc, win) { var docEl = doc.documentElement, resizeEvt = 'orientationchange' in window ? 'orientationchange' : 'resize', recalc = function() { var clientWidth = docEl.clientWidth; if (!clientWidth) return; if (clientWidth >= 640) { docEl.style.fontSize = '100px'; } else { docEl.style.fontSize = 100 * (clientWidth / 640) + 'px'; } }; if (!doc.addEventListener) return; win.addEventListener(resizeEvt, recalc, false); doc.addEventListener('DOMContentLoaded', recalc, false); })(document, window); function imgChange(obj1, obj2) { //獲取點擊的文本框
            var file = document.getElementById("file"); //存放圖片的父級元素
            var imgContainer = document.getElementsByClassName(obj1)[0]; //獲取的圖片文件
            var fileList = file.files; //文本框的父級元素
            var input = document.getElementsByClassName(obj2)[0]; var imgArr = []; //遍歷獲取到得圖片文件
            for (var i = 0; i < fileList.length; i++) { var imgUrl = window.URL.createObjectURL(file.files[i]); imgArr.push(imgUrl); var img = document.createElement("img"); img.setAttribute("src", imgArr[i]); var imgAdd = document.createElement("div"); imgAdd.setAttribute("class", "z_addImg"); imgAdd.appendChild(img); imgContainer.appendChild(imgAdd); }; imgRemove(); }; function imgRemove() { var imgList = document.getElementsByClassName("z_addImg"); var mask = document.getElementsByClassName("z_mask")[0]; var cancel = document.getElementsByClassName("z_cancel")[0]; var sure = document.getElementsByClassName("z_sure")[0]; for (var j = 0; j < imgList.length; j++) { imgList[j].index = j; imgList[j].onclick = function() { var t = this; mask.style.display = "block"; cancel.onclick = function() { mask.style.display = "none"; }; sure.onclick = function() { mask.style.display = "none"; t.style.display = "none"; //$(t).remove();//引用了Jquery才能這樣使用
 }; } }; }; </script>
</body>

</html>

這是效果圖：css

這個配合base64轉碼圖片使用代碼以下：不過不能無限制上傳圖片哈，我這裏限制了只能上傳5張圖片html

<!DOCTYPE html>

<html lang="en">
<head runat="server">
    <meta charset="utf-8" />
    <meta name="renderer" content="webkit|ie-comp|ie-stand" />
    <meta name="viewport" content="width=device-width,height=device-height,user-scalable=no" />
    <meta name="keywords" content="" />
    <meta name="description" content="" />
    <title></title>
    <link href="../service/css/bootstrap.min.css" rel="stylesheet" />
    <script src="scripts/Base64Img.js" type="text/javascript"></script>
    <script type="text/javascript" src="../service/scripts/jquery-2.1.4.min.js"></script>
    <style type="text/css"> * { margin: 0; padding: 0;
        }
        /*圖片上傳*/ html, body { width: 100%; height: 100%;
        } .container { width: 100%; height: 100%; overflow: auto; clear: both;
        } .z_photo { width: 100%; height: 5rem; padding: 0.3rem; overflow: auto; clear: both; border: 1px dashed #ddd;
        } .z_photo img { width: 1rem; height: 1rem;
            } .z_addImg { float: left; margin-right: 0.2rem; margin-bottom: 0.2rem;
        } .z_file { width: 1rem; height: 1rem; background: url(/images/z_add.png) no-repeat; background-size: 100% 100%; float: left; margin-right: 0.2rem;
        } .z_file input::-webkit-file-upload-button { width: 1rem; height: 1rem; border: none; position: absolute; outline: 0; opacity: 0;
            } .z_file input#file { display: block; width: auto; border: 0; vertical-align: middle;
            }
        /*遮罩層*/ .z_mask { width: 100%; height: 100%; background: rgba(0, 0, 0, .5); position: fixed; top: 0; left: 0; z-index: 999; display: none;
        } .z_alert { width: 3rem; height: 2rem; border-radius: .2rem; background: #fff; font-size: .24rem; text-align: center; position: absolute; left: 50%; top: 50%; margin-left: -1.5rem; margin-top: -2rem;
        } .z_alert p:nth-child(1) { line-height: 1.5rem;
            } .z_alert p:nth-child(2) span { display: inline-block; width: 49%; height: .5rem; line-height: .5rem; float: left; border-top: 1px solid #ddd;
            } .z_cancel { border-right: 1px solid #ddd;
        }
    </style>
</head>
<body class="bg-fff">
    <form id="form1" runat="server">
        <div class="section" id="container">
            <div id="head" class="section">
                <div class="section header">
                    <h1>訂單評價</h1>
                    <a href="javascript:void(0);" class="back-btn">
                        <img src="images/back.png" /></a>
                    <!-- 跳轉到會員 -->
                    <a href="javascript:void(0);" class="head-icon" id="inMember">
                        <img src="images/member.png" /></a>
                </div>
            </div>
            <div id="content" class="section">
                <div class="section evaluate-box">
                    <div class="section evaluate-head">

                        <h3>商品評價：</h3>
                        <!-- 評價的星級可經過e-star屬性獲取 -->
                        <!-- 提交的時候向後臺傳遞e-star的屬性值就是星級數 -->
                        <div class="f-left evaluate-star" e-star="0" id="spgoodsLevel">
                            <span>
                                <img src="images/star_b.png"></span>
                            <span>
                                <img src="images/star_b.png"></span>
                            <span>
                                <img src="images/star_b.png"></span>
                            <span>
                                <img src="images/star_b.png"></span>
                            <span>
                                <img src="images/star_b.png"></span>
                        </div>
                    </div>
                    <div class="section evaluate-txt">
                        <textarea placeholder="商品評價？質量、安全等評價" rows="5" id="txtgoodsComment"></textarea>
                    </div>
                </div>
                <div class="section evaluate-box">
                    <div class="section evaluate-head">
                        <h3>圖片上傳：<span style="color: rgba(0, 0, 0, .5);">最多隻能傳5張</span></h3>
                    </div>
                </div>
                <div>
                    <div class="container">
                        <!-- 照片添加 -->
                        <div class="z_photo">
                            <div class="z_file">
                                <input type="file" name="file" id="file" value="" accept="image/*" multiple onchange="imgChange('z_photo','z_file');" />

                                <div class="hidden">
                                    <div class="span" id="update_file_label"></div>
                                    <input type="hidden" id="base64_output1" />
                                    <input type="hidden" id="base64_output2" />
                                    <input type="hidden" id="base64_output3" />
                                    <input type="hidden" id="base64_output4" />
                                    <input type="hidden" id="base64_output5" />
                                    <div class="strong red" id="img_size"></div>
                                    <img id="img_prev" src="../images/member/nophoto.gif" style="max-width: 100%; border: 1px solid gray;">
                                </div>
                            </div>
                        </div>
                        <!--遮罩層-->
                        <div class="z_mask">
                            <!--彈出框-->
                            <div class="z_alert">
                                <p style="display: block;">肯定要刪除這張圖片嗎？</p>
                                <p style="display: block;">
                                    <span class="z_cancel">取消</span>
                                    <span class="z_sure">肯定</span>
                                </p>
                            </div>
                        </div>
                    </div>

                    <script type="text/javascript">
                        //px轉換爲rem
 (function (doc, win) { var docEl = doc.documentElement, resizeEvt = 'orientationchange' in window ? 'orientationchange' : 'resize', recalc = function () { var clientWidth = docEl.clientWidth; if (!clientWidth) return; if (clientWidth >= 640) { docEl.style.fontSize = '100px'; } else { docEl.style.fontSize = 100 * (clientWidth / 640) + 'px'; } }; if (!doc.addEventListener) return; win.addEventListener(resizeEvt, recalc, false); doc.addEventListener('DOMContentLoaded', recalc, false); })(document, window); function imgChange(obj1, obj2) { var imgCount = ($(".z_addImg").length + 1); if (imgCount <= 5) { var _baseImgSrc = "base64_output" + imgCount; //獲取點擊的文本框
                                var file = document.getElementById("file"); //存放圖片的父級元素
                                var imgContainer = document.getElementsByClassName(obj1)[0]; //獲取的圖片文件
                                var fileList = file.files; //文本框的父級元素
                                var input = document.getElementsByClassName(obj2)[0]; var imgArr = []; //遍歷獲取到得圖片文件
                                for (var i = 0; i < fileList.length; i++) { var imgUrl = window.URL.createObjectURL(file.files[i]); imgArr.push(imgUrl); var img = document.createElement("img"); img.setAttribute("src", imgArr[i]); var imgAdd = document.createElement("div"); imgAdd.setAttribute("class", "z_addImg"); imgAdd.appendChild(img); imgContainer.appendChild(imgAdd); }; imgRemove(); console.log(_baseImgSrc); $("#update_file_label").html(this.value); gen_base64(_baseImgSrc, 'img_size', 'img_prev', 'file'); } else { alert("上傳圖片不能超過5張"); } }; function imgRemove() { var imgList = document.getElementsByClassName("z_addImg"); var mask = document.getElementsByClassName("z_mask")[0]; var cancel = document.getElementsByClassName("z_cancel")[0]; var sure = document.getElementsByClassName("z_sure")[0]; for (var j = 0; j < imgList.length; j++) { imgList[j].index = j; imgList[j].onclick = function () { var t = this; mask.style.display = "block"; cancel.onclick = function () { mask.style.display = "none"; }; sure.onclick = function () { mask.style.display = "none"; $(t).remove(); //t.style.display = "none";
 }; } }; }; </script>
                </div>
               </div>
        </div>
        <input id="txtOrderID" type="hidden" runat="server" />
        <input id="txtMemID" type="hidden" runat="server" />
    </form>
</body>
</html>

 

Base64Img.js的代碼：
function $_(id) { return document.getElementById(id); } /*把圖片轉成Base64碼 @param 參數說明： codeInput:把轉好的Base64碼存放在哪一個控件中 imgSize:圖片的大小（單位是KB） imgSrc:點擊上傳後圖片的顯示的標籤 fileInputId:上傳控件的ID */
function gen_base64(codeInput, imgSize, imgSrc, fileInputId) { $_(codeInput).value = ''; $_(imgSize).innerHTML = ''; $_(imgSrc).src = '../images/member/nophoto.gif'; var file = $_(fileInputId).files[0]; if (!/image\/\w+/.test(file.type)) { alert("請確保文件爲圖像類型"); return false; } r = new FileReader();  //本地預覽
    r.onload = function () { $_(codeInput).value = r.result; $_(imgSrc).src = r.result; //$("#img_prev").attr("src", r.result);
        //$("#img_prev").css("width", "50%");
        $_(imgSize).innerHTML = "    圖片大小：" + Math.round(r.result.length / 1024 * 1000) / 1000 + " KB"; } r.readAsDataURL(file); }
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