前言
业务中需要用户进行签字，如何让用户在手机端进行签字？
示例如下
代码已分享至Gitee: https://gitee.com/lengcz/qianming
H5实现手写签字
创建一个html页面
div {
margin-top:1em;
margin-bottom:1em;
}
input {
padding: .5em;
margin: .5em;
}
select {
padding: .5em;
margin: .5em;
}
#signatureparent {
color:darkblue;
background-color:darkgrey;
/*max-width:600px;*/
padding:20px;
}
/*This is the div within which the signature canvas is fitted*/
#signature {
border: 2px dotted black;
background-color:lightgrey;
}
/* Drawing the 'gripper' for touch-enabled devices */
html.touch #content {
float:left;
width:92%;
}
html.touch #scrollgrabber {
float:right;
width:4%;
margin-right:2%;
background-image:url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAAFCAAAAACh79lDAAAAAXNSR0IArs4c6QAAABJJREFUCB1jmMmQxjCT4T/DfwAPLgOXlrt3IwAAAABJRU5ErkJggg==)
}
html.borderradius #scrollgrabber {
border-radius: 1em;
}
jSignature inherits colors from parent element. Text = Pen color. Background = Background. (This works even when Flash-based Canvas emulation is used.)
Display Area:
jQuery.noConflict()
/* @preserve
jQuery pub/sub plugin by Peter Higgins (dante@dojotoolkit.org)
Loosely based on Dojo publish/subscribe API, limited in scope. Rewritten blindly.
Original is (c) Dojo Foundation 2004-2010. Released under either AFL or new BSD, see:
http://dojofoundation.org/license for more information.
*/
(function($) {
var topics = {};
$.publish = function(topic, args) {
if (topics[topic]) {
var currentTopic = topics[topic],
args = args || {};
for (var i = 0, j = currentTopic.length; i < j; i++) {
currentTopic[i].call($, args);
}
}
};
$.subscribe = function(topic, callback) {
if (!topics[topic]) {
topics[topic] = [];
}
topics[topic].push(callback);
return {
"topic": topic,
"callback": callback
};
};
$.unsubscribe = function(handle) {
var topic = handle.topic;
if (topics[topic]) {
var currentTopic = topics[topic];
for (var i = 0, j = currentTopic.length; i < j; i++) {
if (currentTopic[i] === handle.callback) {
currentTopic.splice(i, 1);
}
}
}
};
})(jQuery);
(function($){
$(document).ready(function() {
// This is the part where jSignature is initialized.
var $sigdiv = $("#signature").jSignature({'UndoButton':true})
// All the code below is just code driving the demo.
, $tools = $('#tools')
, $extraarea = $('#displayarea')
, pubsubprefix = 'jSignature.demo.'
var export_plugins = $sigdiv.jSignature('listPlugins','export')
, chops = ['提取签名数据: ','(select export format)']
, name
for(var i in export_plugins){
if (export_plugins.hasOwnProperty(i)){
name = export_plugins[i]
chops.push('' + name + '')
}
}
chops.push(' or: ')
$(chops.join('')).bind('change', function(e){
if (e.target.value !== ''){
var data = $sigdiv.jSignature('getData', e.target.value)
$.publish(pubsubprefix + 'formatchanged')
if (typeof data === 'string'){
$('textarea', $tools).val(data)
} else if($.isArray(data) && data.length === 2){
$('textarea', $tools).val(data.join(','))
$.publish(pubsubprefix + data[0], data);
} else {
try {
$('textarea', $tools).val(JSON.stringify(data))
} catch (ex) {
$('textarea', $tools).val('Not sure how to stringify this, likely binary, format.')
}
}
}
}).appendTo($tools)
$('').bind('click', function(e){
$sigdiv.jSignature('reset')
}).appendTo($tools)
$('