canvas画布实现手写签名效果的示例代码

<!--手写区-->        <div class="mSign_signMark_box">            <div class="mSign_signMark_write_box">                <div id="mSign_signMark_signature_pad" class="mSign_signMark_body_box">                    <div class="mSign_signMark_body">                        <span  class="mSign_signMark_clear_out">                            <img src="../images/mCommon_basicIcon_deleteRed.png">                        </span>                        <p>手写区</p>                        <canvas id="mSign_signMark_canvas"></canvas>                    </div>                </div>            </div>        </div>        <!--手写区 end-->        <!--底部按钮-->        <div class="mSign_signMark_footer">            <span id="mSign_signMark_clear_out" class="mSign_signMark_footer_cancle">清除</span>            <span id="mSign_signMark_submit" class="mSign_signMark_footer_sure">确定</span>        </div>        <!--底部按钮 end-->

.mSign_signMark_box{padding: 15px 15px 26px 15px;}.mSign_signMark_footer{max-width:640px;margin:0 auto;height: 44px;background: #4ba7eb;position: fixed;bottom: 0;left: 0;right: 0;color:#fff;font-size: 16px;text-align: center;line-height: 44px;}.mSign_signMark_footer span{display: block;width: 50%;text-align: center;float: left;}.mSign_signMark_footer_cancle{background: #f4f4f5;color: #333333;}/*手写签名*/.mSign_signMark_write_box{position: relative;height: 240px;}.mSign_signMark_body_box {position: absolute;background-color: #fff;border: 1px solid #ccc;top:0;left: 0;right: 0;bottom: 0;width: 99%;height: auto;min-width: 250px;min-height: 140px;}.mSign_signMark_body {position: absolute;left: 0;right: 0;top: 0;bottom: 0;}.mSign_signMark_body canvas {position: absolute;left: 0;top: 0;width: 100%;height: 100%;}.mSign_signMark_body p{position: absolute;font-size: 14px;color: #ccc;text-align: center;width: 100%;top: 50%;margin-top: -22px;}.mSign_signMark_clear_out{position: absolute;top:-10px;right: -5px;z-index: 10;display: none;}.mSign_signMark_clear_out img{width: 18px;height: 18px;}

//手写区触摸事件$(function() {    var ctouch=$('.mSign_signMark_body canvas');    ctouch.bind("touchstart",function(event){        $('.mSign_signMark_body p').hide();    });    ctouch.mouseover(function(event) {        $('.mSign_signMark_body p').hide();    });});