如何使用Zepto tap事件的穿透与点透（附代码）

<span style="font-size: 14px;">;(function($){<br/>    var touch = {},<br/>        touchTimeout, tapTimeout, swipeTimeout, longTapTimeout,<br/>        longTapDelay = 750,<br/>        gesture<br/>    function swipeDirection(x1, x2, y1, y2) {<br/>        return Math.abs(x1 - x2) >=<br/>            Math.abs(y1 - y2) ? (x1 - x2 > 0 ? 'Left' : 'Right') : (y1 - y2 > 0 ? 'Up' : 'Down')<br/>    }<br/>    function longTap() {<br/>        longTapTimeout = null<br/>        if (touch.last) {<br/>            touch.el.trigger('longTap')<br/>            touch = {}<br/>        }<br/>    }<br/>    function cancelLongTap() {<br/>        if (longTapTimeout) clearTimeout(longTapTimeout)<br/>        longTapTimeout = null<br/>    }<br/>    function cancelAll() {<br/>        if (touchTimeout) clearTimeout(touchTimeout)<br/>        if (tapTimeout) clearTimeout(tapTimeout)<br/>        if (swipeTimeout) clearTimeout(swipeTimeout)<br/>        if (longTapTimeout) clearTimeout(longTapTimeout)<br/>        touchTimeout = tapTimeout = swipeTimeout = longTapTimeout = null<br/>        touch = {}<br/>    }<br/>    function isPrimaryTouch(event){<br/>        return (event.pointerType == 'touch' ||<br/>            event.pointerType == event.MSPOINTER_TYPE_TOUCH)<br/>            && event.isPrimary<br/>    }<br/>    function isPointerEventType(e, type){<br/>        return (e.type == 'pointer'+type ||<br/>            e.type.toLowerCase() == 'mspointer'+type)<br/>    }<br/>    $(document).ready(function(){<br/>        var now, delta, deltaX = 0, deltaY = 0, firstTouch, _isPointerType<br/>        if ('MSGesture' in window) {<br/>            gesture = new MSGesture()<br/>            gesture.target = document.body<br/>        }<br/>        $(document)<br/>            .bind('MSGestureEnd', function(e){<br/>                var swipeDirectionFromVelocity =<br/>                        e.velocityX > 1 ? 'Right' : e.velocityX < -1 ? 'Left' : e.velocityY > 1 ? 'Down' : e.velocityY < -1 ? 'Up' : null;<br/>                if (swipeDirectionFromVelocity) {<br/>                    touch.el.trigger('swipe')<br/>                    touch.el.trigger('swipe'+ swipeDirectionFromVelocity)<br/>                }<br/>            })<br/>            .on('touchstart MSPointerDown pointerdown', function(e){<br/>                if((_isPointerType = isPointerEventType(e, 'down')) &&<br/>                    !isPrimaryTouch(e)) return<br/>                firstTouch = _isPointerType ? e : e.touches[0]<br/>                if (e.touches && e.touches.length === 1 && touch.x2) {<br/>                    // Clear out touch movement data if we have it sticking around<br/>                    // This can occur if touchcancel doesn't fire due to preventDefault, etc.<br/>                    touch.x2 = undefined<br/>                    touch.y2 = undefined<br/>                }<br/>                now = Date.now()<br/>                delta = now - (touch.last || now)<br/>                touch.el = $('tagName' in firstTouch.target ?<br/>                    firstTouch.target : firstTouch.target.parentNode)<br/>                touchTimeout && clearTimeout(touchTimeout)<br/>                touch.x1 = firstTouch.pageX<br/>                touch.y1 = firstTouch.pageY<br/>                if (delta > 0 && delta <= 250) touch.isDoubleTap = true<br/>                touch.last = now<br/>                longTapTimeout = setTimeout(longTap, longTapDelay)<br/>                // adds the current touch contact for IE gesture recognition<br/>                if (gesture && _isPointerType) gesture.addPointer(e.pointerId);<br/>            })<br/>            .on('touchmove MSPointerMove pointermove', function(e){<br/>                if((_isPointerType = isPointerEventType(e, 'move')) &&<br/>                    !isPrimaryTouch(e)) return<br/>                firstTouch = _isPointerType ? e : e.touches[0]<br/>                cancelLongTap()<br/>                touch.x2 = firstTouch.pageX<br/>                touch.y2 = firstTouch.pageY<br/>                deltaX += Math.abs(touch.x1 - touch.x2)<br/>                deltaY += Math.abs(touch.y1 - touch.y2)<br/>            })<br/>            .on('touchend MSPointerUp pointerup', function(e){<br/>                if((_isPointerType = isPointerEventType(e, 'up')) &&<br/>                    !isPrimaryTouch(e)) return<br/>                cancelLongTap()<br/>                // swipe<br/>                if ((touch.x2 && Math.abs(touch.x1 - touch.x2) > 30) ||<br/>                    (touch.y2 && Math.abs(touch.y1 - touch.y2) > 30))<br/>                    swipeTimeout = setTimeout(function() {<br/>                        touch.el.trigger('swipe')<br/>                        touch.el.trigger('swipe' + (swipeDirection(touch.x1, touch.x2, touch.y1, touch.y2)))<br/>                        touch = {}<br/>                    }, 0)<br/>                // normal tap<br/>                else if ('last' in touch)<br/>                // don't fire tap when delta position changed by more than 30 pixels,<br/>                // for instance when moving to a point and back to origin<br/>                    if (deltaX < 30 && deltaY < 30) {<br/>                        // delay by one tick so we can cancel the 'tap' event if 'scroll' fires<br/>                        // ('tap' fires before 'scroll')<br/>                        tapTimeout = setTimeout(function() {<br/>                            // trigger universal 'tap' with the option to cancelTouch()<br/>                            // (cancelTouch cancels processing of single vs double taps for faster 'tap' response)<br/>                            var event = $.Event('tap')<br/>                            event.cancelTouch = cancelAll<br/>                            touch.el.trigger(event)<br/>                            // trigger double tap immediately<br/>                            if (touch.isDoubleTap) {<br/>                                if (touch.el) touch.el.trigger('doubleTap')<br/>                                touch = {}<br/>                            }<br/>                            // trigger single tap after 250ms of inactivity<br/>                            else {<br/>                                touchTimeout = setTimeout(function(){<br/>                                    touchTimeout = null<br/>                                    if (touch.el) touch.el.trigger('singleTap')<br/>                                    touch = {}<br/>                                }, 250)<br/>                            }<br/>                        }, 0)<br/>                    } else {<br/>                        touch = {}<br/>                    }<br/>                deltaX = deltaY = 0<br/>            })<br/>            // when the browser window loses focus,<br/>            // for example when a modal dialog is shown,<br/>            // cancel all ongoing events<br/>            .on('touchcancel MSPointerCancel pointercancel', cancelAll)<br/>        // scrolling the window indicates intention of the user<br/>        // to scroll, not tap or swipe, so cancel all ongoing events<br/>        $(window).on('scroll', cancelAll)<br/>    })<br/>    ;['swipe', 'swipeLeft', 'swipeRight', 'swipeUp', 'swipeDown',<br/>        'doubleTap', 'tap', 'singleTap', 'longTap'].forEach(function(eventName){<br/>            $.fn[eventName] = function(callback){ return this.on(eventName, callback) }<br/>        })<br/>})(Zepto)</span>

$(function(){ new FastClick(document.body); })

$("#close").on("touchend",function(e){
$("#alertBox").hide();
e.preventDefault();
});

<!DOCTYPE html>
<html>
<head>
 <meta charset="UTF-8">
 <meta name="viewport" content="width=device-width,initial-scale=1.0,maximum-scale=1.0,user-scalable=0">
 <title>test-tap-through</title>
 <script src="js/zepto.min.js" charset="utf-8"></script>
 <style media="screen">
 body{
 margin: 0;
 padding: 0;
 }
 .test1,.test2{
 position: relative;
 }
 .button{
 width: 90%;
 height: 75px;
 background-color: #00ffff;
 margin: 5%;
 line-height: 75px;
 text-align: center;
 font-size: 40px;
 }
 .box{
 position: absolute;
 top:0;
 left: 0;
 width: 50%;
 height: 200px;
 background-color: #ff00ff;
 margin: 5%;
 line-height: 100px;
 text-align: center;
 font-size: 40px;
 z-index: 100;
 }
 </style>
</head>
<body>
 <p>
 <input type="button" id="button1" value="button1">
 <input type="button" id="button2" value="button2">
 <p id="box1" style="display:none">box1</p>
 <p id="box2" style="display:none">box2</p>
 </p>
 <p>
 <input type="button" id="button3" value="button3">
 <input type="button" id="button4" value="button4">
 <p id="box3" style="display:none">box3</p>
 <p id="box4" style="display:none">box4</p>
 </p>
</body>
<script type="text/javascript">
 $("#button1").click(function(){
 $("#box2").hide();
 $("#box1").show();
 });
 $("#button2").click(function(){
 $("#box1").hide();
 $("#box2").show();
 });
 $("#box2").tap(function(){
 $("#box2").hide();
 });
 $("#box1").tap(function(){
 $("#box1").hide();
 });
 $("#button3").click(function(){
 $("#box4").hide();
 $("#box3").show();
 });
 $("#button4").click(function(){
 $("#box3").hide();
 $("#box4").show();
 });
 $("#box3").tap(function(){
 setTimeout(function(){$("#box3").hide();},350);
 
 });
 $("#box4").tap(function(){
 setTimeout(function(){$("#box4").hide();},350);
 
 });
</script>
</html>