js pelaksanaan photo wall function example_javascript kemahiran

Contoh dalam artikel ini menerangkan cara melaksanakan fungsi dinding foto dalam js. Kongsikan dengan semua orang untuk rujukan anda. Kaedah pelaksanaan khusus adalah seperti berikut:

Salin kod Kod adalah seperti berikut:

   
       
       
       
       
       
       
       
       
       
            *{padding: 0; jidar: 0;}
            li{list-style: none;}
            ul{lebar: 660px; ketinggian:510px; latar belakang:#ccc;margin: 20px auto;}
            li{width:200px; ketinggian: 150px; jidar: 10px; terapung: kiri; }
       
       
        /*
            var arr=['a','b','c','d','e','d','f'];
            var pos = arr.lastIndexOf('d');
            makluman(pos);
            */
            window.onload=function(){
                var aLi = document.querySelectorAll('li');
                var oInput =  document.querySelector('#btn');
                var pos = [];
                var len= aLi.length;
                var izIndex= 2;
                //布局转换

                 untuk(var i=0;i                     pos.push([aLi[i].offsetLeft,aLi[i].offsetTop]);
                }
                untuk(var i=0;i                     aLi[i].style.left=pos[i][0] 'px';
                    aLi[i].style.top=pos[i][1] 'px';
                    aLi[i].style.position = 'mutlak';
                    aLi[i].style.margin = '0px';
                }
                untuk(var i=0;i                      aLi[i].indeks = i;
                     setDrag(aLi[i]);
                }
                oInput.onclick=function(){
                    var randomArr = [0,1,2,3,4,5,6,7,8];
                    randomArr.sort(function(num1,num2){
                        kembalikan Math.random()-0.5;
                    })
                    untuk(var i=0;i                         //增加随机位置的情况
                       startMove(aLi[i],{left:pos[randomArr[i]][0],top:pos[randomArr[i]][1]});
                       //修正索引
                       aLi[i].index = rawakArr[i];
                    }
                }
                //拖拽
                fungsi setDrag(obj){
                    obj.onmousedown =function(ev){
                        izIndex ;
                        obj.style.zIndex= izIndex;
                        var ev = ev || acara;
                        var disX = ev.clientX - obj.offsetLeft;
                        var disY = ev.clientY - obj.offsetTop;
                        document.onmousemove=function(ev){
                            var ev = ev || acara;
                            obj.style.left =  ev.clientX- disX 'px';
                            obj.style.top =  ev.clientY - disY 'px';
                            untuk(var i=0; i                                 aLi[i].style.border='tiada';
                            }
                            var nL = nearLi(obj);
                            jika(nL){
                                nL.style.border='2px merah pepejal';
                            }                         
                        }
                        document.onmouseup= function(){
                            document.onmousemove = null;
                            document.onmouseup = null;
                            var nL = nearLi(obj);
                            jika(nL){
                                nL.style.border='2px merah pepejal';
                                startMove(obj,{left:pos[nL.index][0],top:pos[nL.index][1]});
                                startMove(nL,{left:pos[obj.index][0],top:pos[obj.index][1]});
                                var tmp =nL.index;
                                nL.index = obj.index;
                                obj.index = tmp;
                                nL.style.border='';
                            }lain{
StartMove(obj,{left:pos[obj.index][0],top:pos[obj.index][1]});
                                                                                                                                                                                                                                                                                                                                                                                                   return palsu                  }
                }
//Kesan sama ada terdapat perlanggaran
                    fungsi ialah Dump(obj1,obj2){
                    var l1= obj1.offsetLeft;
                    var r1= l1 obj1.offsetWidth;
                      var t1= obj1.offsetTop;
                  var b1 =obj1.offsetHeight t1;

var l2= obj2.offsetLeft;
                    var r2= l2 obj2.offsetWidth;
                  var t2= obj2.offsetTop;
                  var b2 =obj2.offsetHeight t2;
Jika(b2r1 || r2b1){
                                                                                                                                                return palsu                        }lain{
                                            kembali benar;
                 }
                }
//Cari nod terdekat
                  fungsi berhampiranLi(obj){
                    var index= -1;
                  nilai var =9999;
untuk(var i=0; i If(isDump(obj,aLi[i]) && obj !=aLi[i]){
                                                var c = getDis(obj,aLi[i]);
Jika(c nilai = c;
indeks = i;
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        Jika(indeks !=-1){
Kembalikan aLi[indeks];
                         }lain{
                                                                                                                                                return palsu                  }
                }
                   fungsi getDis(obj1,obj2){
                    var x = obj1.offsetLeft - obj2.offsetLeft;
                       var y = obj1.offsetTop - obj2.offsetTop;
Kembalikan Math.sqrt(Math.pow(x,2) Math.pow(y,2));
                }
            }
       
   
   
    click
       

           
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希望本文所述对大家的javascript程序设计有所帮助.