基于cropper图片裁剪,兼容PC端与移动端

所需的资源文件

<link rel="stylesheet" href="https://cdn.bootcss.com/cropper/4.0.0-beta/cropper.css">
<script src="http://www.jq22.com/jquery/jquery-1.10.2.js"></script>
<script src="https://cdn.bootcss.com/cropper/4.0.0-beta/cropper.js"></script> 

html代码

<body style="background: #eee">
    <button id="replaceImg" class="l-btn">更换图片</button>
    <div style="width: 320px;height: 320px;border: solid 1px #555;padding: 5px;margin-top: 10px">
        <img id="finalImg" src="" width="100%">
    </div>

    <!--图片裁剪框 start-->
    <div style="display: none" class="tailoring-container">
        <div class="black-cloth" onclick="closeTailor(this)"></div>
        <div class="tailoring-content">
                <div class="tailoring-content-one">
                    <label title="上传图片" for="chooseImg" class="l-btn choose-btn">
                        <input type="file" accept="image/jpg,image/jpeg,image/png" name="file" id="chooseImg" class="hidden" onchange="selectImg(this)">
                        选择图片
                    </label>
                    <div class="close-tailoring"  onclick="closeTailor(this)">×</div>
                </div>
                <div class="tailoring-content-two">
                    <div class="tailoring-box-parcel">
                        <img id="tailoringImg">
                    </div>
                    <div class="preview-box-parcel">
                        <p>图片预览:</p>
                        <div class="square previewImg"></div>
                    </div>
                </div>
                <div class="tailoring-content-three">
                    <button class="l-btn cropper-reset-btn">复位</button>
                    <button class="l-btn cropper-rotate-btn">旋转</button>
                    <button class="l-btn cropper-scaleX-btn">换向</button>
                    <button class="l-btn sureCut" id="sureCut">确定</button>
                </div>
            </div>
    </div>
    <!--图片裁剪框 end-->
</body>

css代码

        *{
            margin: 0;padding: 0;
        }
        .l-btn{
            display: inline-block;
            outline: none;
            resize: none;
            border: none;
            padding:5px 10px;
            background: #8C85E6;
            color: #fff;
            border:solid 1px #8C85E6;
            border-radius: 3px;
            font-size: 14px;
        }
        .l-btn:hover{
            background: #8078e3;
            animation: anniu 1s infinite;
        }
        .l-btn:active{
            box-shadow: 0 2px 3px rgba(0,0,0,.2) inset;
        }
        .hidden{
            display: none;
        }
        .tailoring-container, .tailoring-container div, .tailoring-container p{
            margin: 0;padding: 0;
            box-sizing: border-box;
            -webkit-box-sizing: border-box;
            -moz-box-sizing: border-box;
        }
        .tailoring-container{
            position: fixed;
            width: 100%;
            height: 100%;
            z-index: 1000;
            top: 0;
            left: 0;
        }
        .tailoring-container .black-cloth{
            position: fixed;
            width: 100%;
            height: 100%;
            background: #111;
            opacity: .9;
            z-index: 1001;
        }
        .tailoring-container .tailoring-content{
            position: absolute;
            width: 768px;
            height: 560px;
            background: #fff;
            z-index: 1002;
            left: 0;
            top: 0;
            border-radius: 10px;
            box-shadow: 0 0 10px #000;
            padding: 10px;
        }

        .tailoring-content-one{
            height: 40px;
            width: 100%;
            border-bottom: 1px solid #DDD ;
        }
        .tailoring-content .choose-btn{
            float: left;
        }
        .tailoring-content .close-tailoring{
            display: inline-block;
            height: 30px;
            width: 30px;
            border-radius: 100%;
            background: #eee;
            color: #fff;
            font-size: 22px;
            text-align: center;
            line-height: 30px;
            float: right;
            cursor: pointer;
        }
        .tailoring-content .close-tailoring:hover{
            background: #ccc;
        }

        .tailoring-content .tailoring-content-two{
            width: 100%;
            height: 460px;
            position: relative;
            padding: 5px 0;
        }
        .tailoring-content .tailoring-box-parcel{
            width: 520px;
            height: 450px;
            position: absolute;
            left: 0;
            border: solid 1px #ddd;
        }
        .tailoring-content .preview-box-parcel{
            display: inline-block;
            width: 228px;
            height: 450px;
            position: absolute;
            right: 0;
            padding: 4px 14px;
        }
        .preview-box-parcel p{
            color: #555;
        }
        .previewImg{
            width: 200px;
            height: 200px;
            overflow: hidden;
        }
        .preview-box-parcel .square{
            margin-top: 10px;
            border: solid 1px #ddd;
        }
        .preview-box-parcel .circular{
            border-radius: 100%;
            margin-top: 10px;
            border: solid 1px #ddd;
        }

        .tailoring-content .tailoring-content-three{
            width: 100%;
            height: 40px;
            border-top: 1px solid #DDD ;
            padding-top: 10px;
        }
        .sureCut{
            float: right;
        }

        @media all and (max-width: 768px) {
            .tailoring-container .tailoring-content{
                width: 100%;
                min-width: 320px;
                height: 460px;
            }
            .tailoring-content .tailoring-content-two{
                height: 360px;
            }
            .tailoring-content .tailoring-box-parcel{
                height: 350px;
            }
            .tailoring-container .tailoring-box-parcel{
                width: 100%;
            }
            .tailoring-container .preview-box-parcel{
                display: none;
            }

        }

JS代码

//弹出框水平垂直居中
    (window.onresize = function () {
        var win_height = $(window).height();
        var win_width = $(window).width();
        if (win_width <= 768){
            $(".tailoring-content").css({
                "top": (win_height - $(".tailoring-content").outerHeight())/2,
                "left": 0
            });
        }else{
            $(".tailoring-content").css({
                "top": (win_height - $(".tailoring-content").outerHeight())/2,
                "left": (win_width - $(".tailoring-content").outerWidth())/2
            });
        }
    })();

    //弹出图片裁剪框
    $("#replaceImg").on("click",function () {
        $(".tailoring-container").toggle();
    });
    //图像上传
    function selectImg(file) {
        if (!file.files || !file.files[0]){
            return;
        }
        var reader = new FileReader();
        reader.onload = function (evt) {
            var replaceSrc = evt.target.result;
            //更换cropper的图片
            $(‘#tailoringImg‘).cropper(‘replace‘, replaceSrc,false);//默认false,适应高度,不失真
        }
        reader.readAsDataURL(file.files[0]);
    }
    //cropper图片裁剪
    $(‘#tailoringImg‘).cropper({
        aspectRatio: 3/1,//默认比例
        preview: ‘.previewImg‘,//预览视图
        guides: false,  //裁剪框的虚线(九宫格)
        autoCropArea: 1,  //0-1之间的数值,定义自动剪裁区域的大小,默认0.8
        movable: false, //是否允许移动图片
        dragCrop: true,  //是否允许移除当前的剪裁框,并通过拖动来新建一个剪裁框区域
        movable: true,  //是否允许移动剪裁框
        resizable: true,  //是否允许改变裁剪框的大小
        zoomable: false,  //是否允许缩放图片大小
        mouseWheelZoom: false,  //是否允许通过鼠标滚轮来缩放图片
        touchDragZoom: true,  //是否允许通过触摸移动来缩放图片
        rotatable: true,  //是否允许旋转图片
        crop: function(e) {
            // 输出结果数据裁剪图像。
        }
    });
    //旋转
    $(".cropper-rotate-btn").on("click",function () {
        $(‘#tailoringImg‘).cropper("rotate", 45);
    });
    //复位
    $(".cropper-reset-btn").on("click",function () {
        $(‘#tailoringImg‘).cropper("reset");
    });
    //换向
    var flagX = true;
    $(".cropper-scaleX-btn").on("click",function () {
        if(flagX){
            $(‘#tailoringImg‘).cropper("scaleX", -1);
            flagX = false;
        }else{
            $(‘#tailoringImg‘).cropper("scaleX", 1);
            flagX = true;
        }
        flagX != flagX;
    });

    //裁剪后的处理
    $("#sureCut").on("click",function () {
        if ($("#tailoringImg").attr("src") == null ){
            return false;
        }else{
            var cas = $(‘#tailoringImg‘).cropper(‘getCroppedCanvas‘);//获取被裁剪后的canvas
            var base64url = cas.toDataURL(‘image/png‘); //转换为base64地址形式
            $("#finalImg").prop("src",base64url);//显示为图片的形式

            //关闭裁剪框
            closeTailor();
        }
    });
    //关闭裁剪框
    function closeTailor() {
        $(".tailoring-container").toggle();
    }

  

基于cropper图片裁剪,兼容PC端与移动端

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