HTML5移動端觸控式螢幕圖片輪播滑動

阿新 • • 發佈：2019-02-02

//zepto對移動端滑動擴充套件 ;(function($){ var touch = {}, touchTimeout, tapTimeout, swipeTimeout, longTapTimeout, longTapDelay = 750, gesture function swipeDirection(x1, x2, y1, y2) { return Math.abs(x1 - x2) >= Math.abs(y1 - y2) ? (x1 - x2 > 0 ? 'Left'

: 'Right') : (y1 - y2 > 0 ? 'Up' : 'Down') } function longTap() { longTapTimeout = null if (touch.last) { touch.el.trigger('longTap') touch = {} } } function cancelLongTap() { if (longTapTimeout) clearTimeout(longTapTimeout) longTapTimeout = null

} function cancelAll() { if (touchTimeout) clearTimeout(touchTimeout) if (tapTimeout) clearTimeout(tapTimeout) if (swipeTimeout) clearTimeout(swipeTimeout) if (longTapTimeout) clearTimeout(longTapTimeout) touchTimeout = tapTimeout = swipeTimeout = longTapTimeout = null

touch = {} } function isPrimaryTouch(event){ return (event.pointerType == 'touch' || event.pointerType == event.MSPOINTER_TYPE_TOUCH) && event.isPrimary } function isPointerEventType(e, type){ return (e.type == 'pointer'+type || e.type.toLowerCase() == 'mspointer'+type) } $(document).ready(function(){ var now, delta, deltaX = 0, deltaY = 0, firstTouch, _isPointerType if ('MSGesture' in window) { gesture = new MSGesture() gesture.target = document.body } $(document) .bind('MSGestureEnd', function(e){ var swipeDirectionFromVelocity = e.velocityX > 1 ? 'Right' : e.velocityX < -1 ? 'Left' : e.velocityY > 1 ? 'Down' : e.velocityY < -1 ? 'Up' : null if (swipeDirectionFromVelocity) { touch.el.trigger('swipe') touch.el.trigger('swipe'+ swipeDirectionFromVelocity) } }) .on('touchstart MSPointerDown pointerdown', function(e){ if((_isPointerType = isPointerEventType(e, 'down')) && !isPrimaryTouch(e)) return firstTouch = _isPointerType ? e : e.touches[0] if (e.touches && e.touches.length === 1 && touch.x2) { // Clear out touch movement data if we have it sticking around // This can occur if touchcancel doesn't fire due to preventDefault, etc. touch.x2 = undefined touch.y2 = undefined } now = Date.now() delta = now - (touch.last || now) touch.el = $('tagName' in firstTouch.target ? firstTouch.target : firstTouch.target.parentNode) touchTimeout && clearTimeout(touchTimeout) touch.x1 = firstTouch.pageX touch.y1 = firstTouch.pageY if (delta > 0 && delta <= 250) touch.isDoubleTap = true touch.last = now longTapTimeout = setTimeout(longTap, longTapDelay) // adds the current touch contact for IE gesture recognition if (gesture && _isPointerType) gesture.addPointer(e.pointerId) }) .on('touchmove MSPointerMove pointermove', function(e){ if((_isPointerType = isPointerEventType(e, 'move')) && !isPrimaryTouch(e)) return firstTouch = _isPointerType ? e : e.touches[0] cancelLongTap() touch.x2 = firstTouch.pageX touch.y2 = firstTouch.pageY deltaX += Math.abs(touch.x1 - touch.x2) deltaY += Math.abs(touch.y1 - touch.y2) }) .on('touchend MSPointerUp pointerup', function(e){ if((_isPointerType = isPointerEventType(e, 'up')) && !isPrimaryTouch(e)) return cancelLongTap() // swipe if ((touch.x2 && Math.abs(touch.x1 - touch.x2) > 30) || (touch.y2 && Math.abs(touch.y1 - touch.y2) > 30)) swipeTimeout = setTimeout(function() { if (touch.el){ touch.el.trigger('swipe') touch.el.trigger('swipe' + (swipeDirection(touch.x1, touch.x2, touch.y1, touch.y2))) } touch = {} }, 0) // normal tap else if ('last' in touch) // don't fire tap when delta position changed by more than 30 pixels, // for instance when moving to a point and back to origin if (deltaX < 30 && deltaY < 30) { // delay by one tick so we can cancel the 'tap' event if 'scroll' fires // ('tap' fires before 'scroll') tapTimeout = setTimeout(function() { // trigger universal 'tap' with the option to cancelTouch() // (cancelTouch cancels processing of single vs double taps for faster 'tap' response) var event = $.Event('tap') event.cancelTouch = cancelAll // [by paper] fix -> "TypeError: 'undefined' is not an object (evaluating 'touch.el.trigger'), when double tap if (touch.el) touch.el.trigger(event) // trigger double tap immediately if (touch.isDoubleTap) { if (touch.el) touch.el.trigger('doubleTap') touch = {} } // trigger single tap after 250ms of inactivity else { touchTimeout = setTimeout(function(){ touchTimeout = null if (touch.el) touch.el.trigger('singleTap') touch = {} }, 250) } }, 0) } else { touch = {} } deltaX = deltaY = 0 }) // when the browser window loses focus, // for example when a modal dialog is shown, // cancel all ongoing events .on('touchcancel MSPointerCancel pointercancel', cancelAll) // scrolling the window indicates intention of the user // to scroll, not tap or swipe, so cancel all ongoing events $(window).on('scroll', cancelAll) }) ;['swipe', 'swipeLeft', 'swipeRight', 'swipeUp', 'swipeDown', 'doubleTap', 'tap', 'singleTap', 'longTap'].forEach(function(eventName){ $.fn[eventName] = function(callback){ return this.on(eventName, callback) } }) })(Zepto) $(function(){ photoCarousel($(".images"),$(".images li"),$(".index ul"),-$(window).width(),$(window).width(),$(".images li").length,3000,1000); //圖片輪播 //$ul 容器,$li 元素,$index 索引,left 當前偏移量,width 一次滾動寬度,parentWidth 容器寬度,size 圖片數量,interval 迴圈滾動間隔 0不迴圈播放,scrolltime 滾動過程時間 function photoCarousel($ul,$li,$index,left,width,size,interval,scrolltime){ //move 0:預設左滑右滑；1：停止預設事件，圖片跟隨手勢移動，time 時間大於200毫秒圖片跟隨手勢移動否則執行預設左滑右滑事件 var inner,move=0,time=0,parentWidth=(size+2)*width; $ul.width(parentWidth).css("transition-duration","0s").css("-webkit-transition-duration","0s").css("transform", "translate3d("+ left +"px,0px,0px)").css("-webkit-transform", "translate3d("+ left +"px,0px,0px)"); $li.width(width).css("line-height",$ul.height()+"px"); $li.first().before($li.last().clone()); $li.last().after($li.first().clone()); $li.find("img").width(width); index(); //觸屏 //觸屏開始 $li.bind("touchstart", function(event) { if(interval!=0) clearInterval(inner); move = event.touches[0].pageX; time = new Date().getTime(); //事件停止 event.preventDefault(); }); //觸屏結束 $li.bind("touchend", function(event) { if(interval!=0) inner = auto(); if(move !=0){ $ul.css("transition-duration",(scrolltime/1000.0)+"s").css("-webkit-transition-duration",(scrolltime/1000.0)+"s").css("transform", "translate3d("+ left +"px,0px,0px)").css("-webkit-transform", "translate3d("+ left +"px,0px,0px)"); } time = new Date().getTime(); event.preventDefault(); }); //觸屏移動 $li.bind("touchmove", function(event) { if(interval!=0) clearInterval(inner); if(new Date().getTime()-time>=200){ touch = event.touches[0]; $ul.css("transition-duration","0s").css("-webkit-transition-duration","0s").css("transform", "translate3d("+ (left+touch.pageX-move) +"px,0px,0px)").css("-webkit-transform", "translate3d("+ (left+touch.pageX-move) +"px,0px,0px)"); event.preventDefault(); } }); //左滑 $li.swipeLeft(function(){ move = 0; left = -left != parentWidth - width ? left -width : 0; $ul.css("transition-duration",(scrolltime/1000.0)+"s").css("-webkit-transition-duration",(scrolltime/1000.0)+"s").css("transform", "translate3d("+ left +"px,0px,0px)").css("-webkit-transform", "translate3d("+ left +"px,0px,0px)"); //重置滾動位置 if(-left == (parentWidth - width)){ left = -width; setTimeout(function(){ $ul.css("transition-duration","0s").css("-webkit-transition-duration","0s").css("transform", "translate3d("+ left +"px,0px,0px)").css("-webkit-transform", "translate3d("+ left +"px,0px,0px)"); },scrolltime); } index(); }) //右滑 $li.swipeRight(function(){ move = 0; left = left !=0 ? left + width : -parentWidth + width; $ul.css("transition-duration",(scrolltime/1000.0)+"s").css("-webkit-transition-duration",(scrolltime/1000.0)+"s").css("transform", "translate3d("+ left +"px,0px,0px)").css("-webkit-transform", "translate3d("+ left +"px,0px,0px)"); //重置滾動位置 if(left ==0){ left = -(parentWidth - 2*width); setTimeout(function(){ $ul.css("transition-duration","0s").css("-webkit-transition-duration","0s").css("transform", "translate3d("+ left +"px,0px,0px)").css("-webkit-transform", "translate3d("+ left +"px,0px,0px)"); },scrolltime); } index(); }) //更新圖片下方焦點 function index(){ $index.children().removeClass("on"); $index.children().eq(-left/width-1).addClass("on"); $index.parent().parent().find(".name").text($li.eq(-left/width-1).find("img").attr("alt")); } function auto() { inner = setInterval(function () { move = 0; left = -left != parentWidth - width ? left -width : 0; $ul.css("transition-duration",(scrolltime/1000.0)+"s").css("-webkit-transition-duration",(scrolltime/1000.0)+"s").css("transform", "translate3d("+ left +"px,0px,0px)").css("-webkit-transform", "translate3d("+ left +"px,0px,0px)"); if(-left == (parentWidth - width)){ left = -width; setTimeout(function(){ $ul.css("transition-duration","0s").css("-webkit-transition-duration","0s").css("transform", "translate3d("+ left +"px,0px,0px)").css("-webkit-transform", "translate3d("+ left +"px,0px,0px)"); },scrolltime); } index(); }, interval); return inner; } //橫豎屏切換 $(window).bind("orientationchange", function(event){ clearInterval(inner); width = $(window).width(); left=-width; parentWidth=(size+2)*width; $li.width(width).css("line-height",$ul.height()+"px"); $li.find("img").width(width); $ul.width(parentWidth).css("transition-duration","0s").css("-webkit-transition-duration","0s").css("transform", "translate3d("+ left +"px,0px,0px)").css("-webkit-transform", "translate3d("+ left +"px,0px,0px)"); index(); if(interval!=0) inner = auto(); }); if(interval!=0){ auto(); } } })

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