基于JS工厂模式的H5应用，实现了轮播图功能与滑屏功能，并且实现了文字大小的自适应功能，基于SASS样式开发。
核心的JS代码如下：
index.js
define(function(){ var self = null, start = null, move = null, end = null, handle = null, timer = null, left = 0, x = 0, startX = 0, baseWidth = window.screen.width, // 移动设备屏幕的宽度 baseSize = baseWidth * 0.2, // 滑动切换阈值 banner = document.getElementById("banner"), // 获取Banner center = document.getElementById("center"), // 获取center ulList = document.getElementsByTagName("ul"), incBanner = document.getElementById('incBanner'), incCenter = document.getElementById('incCenter'); var app = { init : function(){ self = this; start = self.touchStart; move = self.touchMove; end = self.touchEnd; handle = self.addHandler; self.pageInit(); self.bindTouch(banner, start, move, end); self.bindTouch(center, start, move, end); self.shiftBanner(banner); }, pageInit : function(){ for (var i=0; i < ulList.length; i++) { ulList[i].style.left = 0 + 'px'; ulList[i].style.width = 3 * baseWidth + 'px'; } }, bindTouch : function(elem, handler1, handler2, handler3){ handle(elem, "touchstart", handler1); handle(elem, "touchmove", handler2); handle(elem, "touchend", handler3); }, touchStart : function(event){ var touch = event.touches[0]; left = parseInt(this.style.left); x = 0; startX = 0; startX = touch.pageX; //刚触摸时的坐标 if(this == banner){ timer = clearInterval(timer); } }, touchMove : function(event){ //滑动过程 var touch = event.touches[0]; x = startX - touch.pageX; //滑动的距离 this.style.left = left - x + 'px'; }, touchEnd : function(event){ //手指离开屏幕 self.move(this); self.moveAdjust(this); self.indicate(this); if(this == banner){ self.shiftBanner(banner); } }, move : function(elem){ var leftTmp = left; //缓存touchMove结束时的滑动位置 elem.style.left = left; if (x > baseSize) { elem.style.left = left - baseWidth + 'px'; } else if (x < -baseSize) { elem.style.left = left + baseWidth + 'px'; } else { elem.style.left = leftTmp + 'px'; } }, moveAdjust : function(elem){ left = parseInt(elem.style.left) if (left < -baseWidth * 2) { left = -baseWidth * 2; elem.style.left = left + 'px'; } if (left > 0) { left = 0; elem.style.left = left + 'px'; } x = 0; }, indicate : function(elem){ if (elem == banner) { self.activeClass(incBanner); }else if (elem == center) { self.activeClass(incCenter); } }, activeClass : function(elem){ var len = elem.children.length; for (var i = 0; i < len; i++) { elem.children[i].className=" "; } if (left == 0) { elem.children[0].className = "active"; } else if (left == (-baseWidth)) { elem.children[1].className = "active"; }else if (left == (-2*baseWidth)) { elem.children[2].className = "active"; } }, shiftBanner : function(elem){ var t = new Date(); var tmpLeft = parseInt(elem.style.left); timer = setInterval(function(){ if ((tmpLeft == 0) || (tmpLeft == -baseWidth)) { elem.style.left = tmpLeft - baseWidth + 'px'; } else if (tmpLeft == -2*baseWidth) { elem.style.left = 0 + 'px'; } tmpLeft = parseInt(elem.style.left); left = tmpLeft; // console.log(elem.style.left); // console.log(t); self.indicate(banner); },4000); }, addHandler : function(element, type, handler){ if (element.addEventListener) { element.addEventListener(type, handler, true); } else if (element.attachEvent) { element.attachEvent("on" + type, handler); } else { element["on" + type] = handler; } } }; return { init : function(){ app.init(); } }; });
可以在浏览器中打开： https://iove1123.github.io/policy
项目源码见GitHub：https://github.com/iove1123/policy
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