点击小图浏览大图，双击缩放，赶快拿走

功能实现：
点击小图浏览大图，双击放大，滑动切换，上滑或下滑关闭，双指放大或缩小（到了最小是自动关闭），预加载缓冲。
调用的第三方插件，好处就是没有借用jquery，而且滑动，缩放效果超流畅
最底下有效果图和所需文件下载
1，引入CSS及JS

<link rel="stylesheet prefetch" href="../plugin/touchPhotos/photoswipe.css">  
<link rel="stylesheet prefetch" href="../plugin/touchPhotos/default-skin.css">  
<script src="../plugin/touchPhotos/stopExecutionOnTimeout.js"></script>  
<script src="../plugin/touchPhotos/photoswipe.min.js"></script>  
<script src="../plugin/touchPhotos/photoswipe-ui-default.min.js"></script>

2，小图片容器（这里要获取原图地址及图片尺寸），我是通过JSON来获取的，就写个JSON的写法了
//容器 my-simple-gallery，获取图片的宽度和高度

data += '<div class="my-simple-gallery">';  
for(var k=0; k<data.photos.length; k++){  
    data += '<figure itemprop="associatedMedia" itemscope=""><a href="'+data.photos[k].big+'" data-size="'+data.photos[k].size+'"><img src="'+data.photos[k].small+'" ></a></figure>';  
}  
data += '</div>';

自己讲data插入到ID里面了哈
然后就指定浏览图片的那个容器了
initPhotoSwipeFromDOM('.my-simple-gallery');

3.下面的代码写的有点恶心，直接拿去放到模板里面

4.处理大图的，直接拿去
var initPhotoSwipeFromDOM = function (gallerySelector) {
var parseThumbnailElements = function (el) {
var thumbElements = el.childNodes, numNodes = thumbElements.length, items = [], figureEl, childElements, linkEl, size, item;
for (var i = 0; i < numNodes; i++) {
if (window.CP.shouldStopExecution(1)) {
break;
}
figureEl = thumbElements[i];
if (figureEl.nodeType !== 1) {
continue;
}
linkEl = figureEl.children[0];
size = linkEl.getAttribute('data-size').split('x');
item = {
src: linkEl.getAttribute('href'),
w: parseInt(size[0], 10),
h: parseInt(size[1], 10)
};
if (figureEl.children.length > 1) {
item.title = figureEl.children[1].innerHTML;
}
if (linkEl.children.length > 0) {
item.msrc = linkEl.children[0].getAttribute('src');
}
item.el = figureEl;
items.push(item);
}
window.CP.exitedLoop(1);
return items;
};
var closest = function closest(el, fn) {
return el && (fn(el) ? el : closest(el.parentNode, fn));
};
var onThumbnailsClick = function (e) {
e = e || window.event;
e.preventDefault ? e.preventDefault() : e.returnValue = false;
var eTarget = e.target || e.srcElement;
var clickedListItem = closest(eTarget, function (el) {
return el.tagName && el.tagName.toUpperCase() === 'FIGURE';
});
if (!clickedListItem) {
return;
}
var clickedGallery = clickedListItem.parentNode, childNodes = clickedListItem.parentNode.childNodes, numChildNodes = childNodes.length, nodeIndex = 0, index;
for (var i = 0; i < numChildNodes; i++) {
if (window.CP.shouldStopExecution(2)) {
break;
}
if (childNodes[i].nodeType !== 1) {
continue;
}
if (childNodes[i] === clickedListItem) {
index = nodeIndex;
break;
}
nodeIndex++;
}
window.CP.exitedLoop(2);
if (index >= 0) {
openPhotoSwipe(index, clickedGallery);
}
return false;
};
var photoswipeParseHash = function () {
var hash = window.location.hash.substring(1), params = {};
if (hash.length < 5) {
return params;
}
var vars = hash.split('&');
for (var i = 0; i < vars.length; i++) {
if (window.CP.shouldStopExecution(3)) {
break;
}
if (!vars[i]) {
continue;
}
var pair = vars[i].split('=');
if (pair.length < 2) {
continue;
}
params[pair[0]] = pair[1];
}
window.CP.exitedLoop(3);
if (params.gid) {
params.gid = parseInt(params.gid, 10);
}
if (!params.hasOwnProperty('pid')) {
return params;
}
params.pid = parseInt(params.pid, 10);
return params;
};
var openPhotoSwipe = function (index, galleryElement, disableAnimation) {
var pswpElement = document.querySelectorAll('.pswp')[0], gallery, options, items;
items = parseThumbnailElements(galleryElement);
options = {
index: index,
galleryUID: galleryElement.getAttribute('data-pswp-uid'),
getThumbBoundsFn: function (index) {
var thumbnail = items[index].el.getElementsByTagName('img')[0], pageYScroll = window.pageYOffset || document.documentElement.scrollTop, rect = thumbnail.getBoundingClientRect();
return {
x: rect.left,
y: rect.top + pageYScroll,
w: rect.width
};
},
history: false,
focus: false
};
if (disableAnimation) {
options.showAnimationDuration = 0;
}
gallery = new PhotoSwipe(pswpElement, PhotoSwipeUI_Default, items, options);
gallery.init();
};
var galleryElements = document.querySelectorAll(gallerySelector);
for (var i = 0, l = galleryElements.length; i < l; i++) {
if (window.CP.shouldStopExecution(4)) {
break;
}
galleryElements[i].setAttribute('data-pswp-uid', i + 1);
galleryElements[i].onclick = onThumbnailsClick;
}
window.CP.exitedLoop(4);
var hashData = photoswipeParseHash();
if (hashData.pid > 0 && hashData.gid > 0) {
openPhotoSwipe(hashData.pid - 1, galleryElements[hashData.gid - 1], true);
}
};