jQuery如何實現手勢解鎖密碼特效

這篇文章主要為大家展示了“jQuery如何實現手勢解鎖密碼特效”，內容簡而易懂，條理清晰，希望能夠幫助大家解決疑惑，下面讓小編帶領大家一起研究并學習一下“jQuery如何實現手勢解鎖密碼特效”這篇文章吧。

效果預覽圖：

驗證成功：（可以進行頁面挑戰等...）

驗證失敗：

 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", //主要的控件顏色
  roundRadii:42, //大圓點的半徑
  pointRadii:6, //大圓點被選中時顯示的圓心的半徑
  space:60, //大圓點之間的間隙
  width:440, //整個組件的寬度
  height:440, //整個組件的高度
  lineColor:"#00aec7", //用戶劃出線條的顏色
  zindex :100 //整個組件的css z-index屬性
 })

密碼判斷代碼：(這里的密碼“34569”意思為頁面上從上到下，從左到右的9個原點中的5個點)

$("#gesturepwd").on("hasPasswd",function(e,passwd){
  var result;
  if(passwd == "34569"){//密碼設置處
   result=true;
  } else {
   alert("密碼錯誤!");
   result=false;
  }
  if(result == true){
   $("#gesturepwd").trigger("passwdRight");
   setTimeout(function(){
   //密碼驗證正確后的其他操作，打開新的頁面等。。。
    //alert("密碼正確！")
    //window.location.href="../統計圖/index.html";
    alert("驗證通過!");


   },500); //延遲半秒以照顧視覺效果
  }
  else{
   $("#gesturepwd").trigger("passwdWrong");
   //密碼驗證錯誤后的其他操作。。。
  }
 })

核心腳本調用展示(這里有興趣的話可以仔細研究下...)：

;
(function ($) {


 var GesturePasswd= function (element, options) {
  this.$element = $(element);
  this.options = options;
  var that=this;
  this.pr=options.pointRadii;
  this.rr=options.roundRadii;
  this.o=options.space;
  this.color=options.color;
  //全局樣式
  this.$element.css({
   "position":"relation",
   "width":this.options.width,
   "height":this.options.height,
   "background-color":options.backgroundColor,
   "overflow":"hidden",
   "cursor":"default"
  });


  //選擇器規范
  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"
 };




//代碼整理：懶人之家 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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