js判断手机和pc端选择不同执行事件的方法

判断是否为手机：

function isMobile(){//是手机返回true
var sUserAgent= navigator.userAgent.toLowerCase(),
bIsIpad= sUserAgent.match(/ipad/i) == "ipad",
bIsIphoneOs= sUserAgent.match(/iphone os/i) == "iphone os",
bIsMidp= sUserAgent.match(/midp/i) == "midp",
bIsUc7= sUserAgent.match(/rv:1.2.3.4/i) == "rv:1.2.3.4",
bIsUc= sUserAgent.match(/ucweb/i) == "ucweb",
bIsAndroid= sUserAgent.match(/android/i) == "android",
bIsCE= sUserAgent.match(/windows ce/i) == "windows ce",
bIsWM= sUserAgent.match(/windows mobile/i) == "windows mobile",
bIsWebview = sUserAgent.match(/webview/i) == "webview";
return (bIsIpad || bIsIphoneOs || bIsMidp || bIsUc7 || bIsUc || bIsAndroid || bIsCE || bIsWM);
}

判断使用那种事件：

var touchStart,touchMove,touchEnd;
touchStart = isMobile() ? 'touchstart' : 'mousedown';
touchMove = isMobile() ? 'touchmove' : 'mousemove';
touchEnd = isMobile() ? 'touchend' : 'mouseup';

三种事件的相应处理：

touchstart:function(e){
var e=e || window.event; //要判断使用哪种event
stopDefault(e);     //不同的浏览器，阻止浏览器默认事件方法不同

if(isMobile()){     //如果是手机
var touch=e.touches[0];
this.y1=touch.pageY
}else{
this.y1=e.pageY;   //如果不是手机
}
this.y2=0;
},
touchmove:function(e){
var e=e || window.event;
stopDefault(e);
if(isMobile()){
var touch=e.touches[0];
this.y2=touch.pageY;
}else{
this.y2=e.pageY;
}
},

touchend:function(e){
var e=e || window.event;
stopDefault(e);
if(this.y2==0){
return;
}
var diffY=this.y2-this.y1;
if(diffY>50){
this.doNext();
}else if(diffY<-50){
this.doPrev();
}
this.y1=0,
this.y2=0;
},

阻止浏览器默认事件方法：

function stopDefault(e){
var e=e || window.event;
if(e.preventDefault){
e.preventDefault();
}else{
e.returnValue=false;
}
}