canvas画布实现手写签名效果的示例代码

最近项目中涉及到移动端手写签名的功能需求，将实现代码记录于此，供小伙伴们参考指摘哦~

HTML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=http://www.jb51.net/html5/"../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-->

CSS样式：

.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;}

页面引入JS：

//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(); }); });

手写签名引入js文件地址：qianmian-js_jb51.rar

实现效果如下：

（编辑：广西网）

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