本文实例为大家分享了jQuery实现手势解锁密码的具体代码，供大家参考，具体内容如下
效果预览图：
验证成功：（可以进行页面挑战等...）
验证失败：
HTML：
<div id="gesturepwd" style="position: absolute;width:440px;height:440px;left:50%;top:50%;
margin-left:-220px;margin-top:-220px"></div>
首次渲染：
$("#gesturepwd").GesturePasswd({
margin:"0px auto",
backgroundColor:"#252736", //背景色
color:"#FFFFFF", //主要的控件颜色
roundRadii:42, //大圆点的半径
pointRadii:6, //大圆点被选中时显示的圆心的半径
space:60, //大圆点之间的间隙
width:440, //整个组件的宽度
height:440, //整个组件的高度
lineColor:"#00aec7", //用户划出线条的颜色
zindex :100 //整个组件的css z-index属性
})
密码判断代码：(这里的密码“34569”意思为页面上从上到下，从左到右的9个原点中的5个点)
$("#gesturepwd").on("hasPasswd",function(e,passwd){
var result;
if(passwd == "34569"){//密码设置处
result=true;
} else {
alert("密码错误!");
result=false;
}
if(result == true){
$("#gesturepwd").trigger("passwdRight");
setTimeout(function(){
//密码验证正确后的其他操作，打开新的页面等。。
//alert("密码正确！")
//window.location.href="../统计图/index.html";
alert("验证通过!");
},500); //延迟半秒以照顾视觉效果
}
else{
$("#gesturepwd").trigger("passwdWrong");
//密码验证错误后的其他操作。。
}
})
核心脚本调用展示(这里有兴趣的话可以仔细研究下...)：
;
(function ($) {
var GesturePasswd= function (element, options) {
this.$element = $(element);
this.options = options;
var that=this;
this.pr=options.pointRadii;
this.rr=options.roundRadii;
this.o=options.space;
this.color=options.color;
//全局样式
this.$element.css({
"position":"relation",
"width":this.options.width,
"height":this.options.height,
"background-color":options.backgroundColor,
"overflow":"hidden",
"cursor":"default"
});
//选择器规范
if(! $(element).attr("id"))
$(element).attr("id",(Math.random()*65535).toString());
this.id="#"+$(element).attr("id");
var Point = function (x,y){
this.x =x;this.y=y
};
this.result="";
this.pList=[];
this.sList=[];
this.tP=new Point(0,0);
this.$element.append('<canvas class="main-c" width="'+options.width+'" height="'+options.height+'" >');
//this.$element.append('<canvas class="main-p" width="'+options.width+'" height="'+options.height+'" >');
this.$c= $(this.id+" .main-c")[0];
this.$ctx=this.$c.getContext('2d');
this.initDraw=function(){
this.$ctx.strokeStyle=this.color;
this.$ctx.lineWidth=2;
for(var j=0; j<3;j++ ){
for(var i =0;i<3;i++){
this.$ctx.moveTo(this.o/2+this.rr*2+i*(this.o+2*this.rr),this.o/2+this.rr+j*(this.o+2*this.rr));
this.$ctx.arc(this.o/2+this.rr+i*(this.o+2*this.rr),this.o/2+this.rr+j*(this.o+2*this.rr),this.rr,0,2*Math.PI);
var tem=new Point(this.o/2+this.rr+i*(this.o+2*this.rr),this.o/2+this.rr+j*(this.o+2*this.rr));
if (that.pList.length < 9)
this.pList.push(tem);
}
}
this.$ctx.stroke();
this.initImg=this.$ctx.getImageData(0,0,this.options.width,this.options.height);
};
this.initDraw();
//this.$ctx.stroke();
this.isIn=function(x,y){
for (var p in that.pList){
//console.log(that.pList[p][x]);
// console.log(( Math.pow((x-that.pList[p][x]),2)+Math.pow((y-that.pList[p][y]),2)));
if(( Math.pow((x-that.pList[p]["x"]),2)+Math.pow((y-that.pList[p]["y"]),2) ) < Math.pow(this.rr,2)){
return that.pList[p];
}
}
return 0;
};
this.pointDraw =function(c){
if (arguments.length>0){
that.$ctx.strokeStyle=c;
that.$ctx.fillStyle=c;
}
for (var p in that.sList){
that.$ctx.moveTo(that.sList[p]["x"]+that.pr,that.sList[p]["y"]);
that.$ctx.arc(that.sList[p]["x"],that.sList[p]["y"],that.pr,0,2*Math.PI);
that.$ctx.fill();
}
};
this.lineDraw=function (c){
if (arguments.length>0){
that.$ctx.strokeStyle=c;
that.$ctx.fillStyle=c;
}
if(that.sList.length > 0){
for( var p in that.sList){
if(p == 0){
console.log(that.sList[p]["x"],that.sList[p]["y"]);
that.$ctx.moveTo(that.sList[p]["x"],that.sList[p]["y"]);
continue;
}
that.$ctx.lineTo(that.sList[p]["x"],that.sList[p]["y"]);
console.log(that.sList[p]["x"],that.sList[p]["y"]);
}
}
};
this.allDraw =function(c){
if (arguments.length>0){
this.pointDraw(c);
this.lineDraw(c);
that.$ctx.stroke();
}
else {
this.pointDraw();
this.lineDraw();
}
};
this.draw=function(x,y){
that.$ctx.clearRect(0,0,that.options.width,that.options.height);
that.$ctx.beginPath();
//that.initDraw();
that.$ctx.putImageData(this.initImg,0,0);
that.$ctx.lineWidth=4;
that.pointDraw(that.options.lineColor);
that.lineDraw(that.options.lineColor);
that.$ctx.lineTo(x,y);
that.$ctx.stroke();
};
this.pointInList=function(poi,list){
for (var p in list){
if( poi["x"] == list[p]["x"] && poi["y"] == list[p]["y"]){
return ++p;
}
}
return false;
};
this.touched=false;
$(this.id).on ("mousedown touchstart",{that:that},function(e){
e.data.that.touched=true;
});
$(this.id).on ("mouseup touchend",{that:that},function(e){
e.data.that.touched=false;
that.$ctx.clearRect(0,0,that.options.width,that.options.height);
that.$ctx.beginPath();
that.$ctx.putImageData(e.data.that.initImg,0,0);
that.allDraw(that.options.lineColor);
// that.$ctx.stroke();
for(var p in that.sList){
if(e.data.that.pointInList(that.sList[p], e.data.that.pList)){
e.data.that.result= e.data.that.result+(e.data.that.pointInList(that.sList[p], e.data.that.pList)).toString();
}
}
$(element).trigger("hasPasswd",that.result);
});
//
$(this.id).on('touchmove mousemove',{that:that}, function(e) {
if(e.data.that.touched){
var x= e.pageX || e.originalEvent.targetTouches[0].pageX ;
var y = e.pageY || e.originalEvent.targetTouches[0].pageY;
x=x-that.$element.offset().left;
y=y-that.$element.offset().top;
var p = e.data.that.isIn(x, y);
console.log(x)
if(p != 0 ){
if ( !e.data.that.pointInList(p,e.data.that.sList)){
e.data.that.sList.push(p);
}
}
console.log( e.data.that.sList);
e.data.that.draw(x, y);
}
});
$(this.id).on('passwdWrong',{that:that}, function(e) {
that.$ctx.clearRect(0,0,that.options.width,that.options.height);
that.$ctx.beginPath();
that.$ctx.putImageData(that.initImg,0,0);
that.allDraw("#cc1c21");
that.result="";
that.pList=[];
that.sList=[];
setTimeout(function(){
that.$ctx.clearRect(0,0,that.options.width,that.options.height);
that.$ctx.beginPath();
that.initDraw()
},500)
});
$(this.id).on('passwdRight',{that:that}, function(e) {
that.$ctx.clearRect(0,0,that.options.width,that.options.height);
that.$ctx.beginPath();
that.$ctx.putImageData(that.initImg,0,0);
that.allDraw("#00a254");
that.result="";
that.pList=[];
that.sList=[];
setTimeout(function(){
that.$ctx.clearRect(0,0,that.options.width,that.options.height);
that.$ctx.beginPath();
that.initDraw()
},500)
});
};
GesturePasswd.DEFAULTS = {
zindex :100,
roundRadii:25,
pointRadii:6,
space:30,
width:240,
height:240,
lineColor:"#00aec7",
backgroundColor:"#252736",
color:"#FFFFFF"
};
//代码整理：懒人之家 www.lanrenzhijia.com
function Plugin(option,arg) {
return this.each(function () {
var $this = $(this);
var options = $.extend({}, GesturePasswd.DEFAULTS, typeof option == 'object' && option);
var data = $this.data('GesturePasswd');
var action = typeof option == 'string' ? option : NaN;
if (!data) $this.data('danmu', (data = new GesturePasswd(this, options)));
if (action) data[action](arg);
})
}
$.fn.GesturePasswd = Plugin;
$.fn.GesturePasswd.Constructor = GesturePasswd;
})(jQuery);
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