js implementation of photo wall function example_javascript skills

The example in this article describes how to implement the photo wall function in js. Share it with everyone for your reference. The specific implementation method is as follows:

Copy code The code is as follows:

   
       
       
       
       
       
       
       
       
       
        <script><br>         /*<br>             var arr=['a','b','c','d','e','d','f'];<br>             var pos = arr.lastIndexOf('d');<br>             alert(pos);<br>             */<br>             window.onload=function(){<br>                 var aLi = document.querySelectorAll('li');<br>                 var oInput =  document.querySelector('#btn');<br>                 var pos = [];<br>                 var len= aLi.length;<br>                 var izIndex= 2;<br>                 //布局转换<p>                for(var i=0;i<len;i ){<br />                     pos.push([aLi[i].offsetLeft,aLi[i].offsetTop]);<br />                 }<br />                 for(var i=0;i<len;i ){<br />                     aLi[i].style.left=pos[i][0] 'px';<br />                     aLi[i].style.top=pos[i][1] 'px';<br />                     aLi[i].style.position = 'absolute';<br />                     aLi[i].style.margin = '0px';<br />                 }<br />                 for(var i=0;i<len;i ){<br />                      aLi[i].index = i;<br />                      setDrag(aLi[i]);<br />                 } <br />                 oInput.onclick=function(){<br />                     var randomArr = [0,1,2,3,4,5,6,7,8];<br />                     randomArr.sort(function(num1,num2){<br />                         return Math.random()-0.5;<br />                     })<br />                     for(var i=0;i<len;i ){<br />                         //增加随机位置的情况<br />                        startMove(aLi[i],{left:pos[randomArr[i]][0],top:pos[randomArr[i]][1]});<br />                        //修正索引<br />                        aLi[i].index = randomArr[i];<br />                     } <br />                 }<br />                 //拖拽<br />                 function setDrag(obj){<br />                     obj.onmousedown =function(ev){<br />                         izIndex ;<br />                         obj.style.zIndex= izIndex;<br />                         var ev = ev || event;<br />                         var disX = ev.clientX - obj.offsetLeft;<br />                         var disY = ev.clientY - obj.offsetTop;<br />                         document.onmousemove=function(ev){<br />                            var ev = ev || event;<br />                             obj.style.left =  ev.clientX- disX 'px';<br />                             obj.style.top =  ev.clientY - disY 'px';<br />                             for(var i=0; i<len; i ){<br />                                 aLi[i].style.border='none';<br />                             } <br />                             var nL = nearLi(obj); <br />                             if(nL){<br />                                 nL.style.border='2px solid red';<br />                             }                          <br />                         }<br />                         document.onmouseup= function(){<br />                             document.onmousemove = null;<br />                             document.onmouseup = null;<br />                             var nL = nearLi(obj); <br />                             if(nL){<br />                                 nL.style.border='2px solid red';<br />                                 startMove(obj,{left:pos[nL.index][0],top:pos[nL.index][1]});<br />                                 startMove(nL,{left:pos[obj.index][0],top:pos[obj.index][1]});<br />                                 var tmp =nL.index;<br />                                 nL.index = obj.index;<br />                                 obj.index = tmp;<br />                                 nL.style.border='';<br />                             }else{<br />StartMove(obj,{left:pos[obj.index][0],top:pos[obj.index][1]});<br />                                                                                                                                                                                             }                                                                                              return false;                  }<br />                 }<br /> //Detect whether there is a collision<br />                     function isDump(obj1,obj2){<br />                     var l1= obj1.offsetLeft;<br />                     var r1= l1 obj1.offsetWidth;<br />                   var t1= obj1.offsetTop;<br />                     var b1 =obj1.offsetHeight t1;<br /><p> var l2= obj2.offsetLeft;<br />                     var r2= l2 obj2.offsetWidth;<br />                        var t2= obj2.offsetTop;<br />                     var b2 =obj2.offsetHeight t2;<br /> If(b2<t1 || l2>r1 || r2<l1 || t2>b1){<br>                                                                                              return false;                        }else{<br>                                   return true;<br>                  }<br>                 }<br> //Find the nearest node<br> function nearLi(obj){<br>                   var index= -1;<br>                   var value =9999;<br> for(var i=0; i<len; i){<br> If(isDump(obj,aLi[i]) && obj !=aLi[i]){<br>                                                 var c = getDis(obj,aLi[i]);<br> If(c <value){<br>                                                value = c; index = i;<br>                                                                                                    }                                                                                                        }                                                                                                                                                                              If(index !=-1){<br> Return aLi[index];<br>                        }else{<br>                                                                                              return false;                  }<br>                 }<br>                     function getDis(obj1,obj2){<br>                     var x = obj1.offsetLeft - obj2.offsetLeft;<br>                        var y = obj1.offsetTop - obj2.offsetTop;<br> Return Math.sqrt(Math.pow(x,2) Math.pow(y,2));<br>                }<br>             }<br>         </script>
   
   
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希望本文所述对大家的javascript程序设计有所帮助。