javascript 使用 jquery 创建动态 html 页面
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Dynamic html page creation with jquery
提问by Johny Jaz
I will try to keep this post the shortest possible.
我会尽量保持这篇文章的最短。
I am trying to create a jquery mobile web-page where , i import the photos and albums from a facebook page , using the facebook javascript sdk , and show them to my page. I also use the PhotoSwipeplugin to get the albums show nicely with carousel effects etc. You dont need to have any knowledge on the plugin or the sdk to help, as i can tell you exactly where is my problem and you only need to know javascript/jquery.
我正在尝试创建一个 jquery 移动网页，我从 facebook 页面导入照片和相册，使用 facebook javascript sdk，并将它们显示到我的页面。我还使用PhotoSwipe插件来让相册通过轮播效果等很好地显示出来。你不需要对插件或 sdk 有任何帮助，因为我可以确切地告诉你我的问题在哪里，你只需要知道 javascript /jquery.
My problem is that i do import the albums and show them to the user but i cant get the carousel effect of the plugin. From the example code of the plugin , when a user selects a picture this code is executed:
我的问题是我确实导入了专辑并将它们显示给用户，但我无法获得插件的轮播效果。从插件的示例代码中，当用户选择一张图片时，会执行以下代码：
$(document).ready(function(){
$('div.gallery-page')
.live('pageshow', function(e){
var
currentPage = $(e.target),
options = {},
photoSwipeInstance = $("ul.gallery a", e.target).photoSwipe(options, currentPage.attr('id'));
return true;
})
.live('pagehide', function(e){
var
currentPage = $(e.target),
photoSwipeInstance = PhotoSwipe.getInstance(currentPage.attr('id'));
if (typeof photoSwipeInstance != "undefined" && photoSwipeInstance != null) {
PhotoSwipe.detatch(photoSwipeInstance);
}
return true;
});
});
}(window, window.jQuery, window.Code.PhotoSwipe));
I use the same code(i use .on on my code) to my "dynamically-generated" web-page but it seems that the code inside $('div.gallery-page')is NEVER executed. And i really cant figure out why , as the page that i generate is identical to the example page. I give the same classnames, i use the same divseverything.
我对我的“动态生成”网页使用相同的代码（我在我的代码上使用 .on），但似乎里面的代码$('div.gallery-page')从未执行过。我真的不知道为什么，因为我生成的页面与示例页面相同。我给相同的class名字，我使用相同的divs一切。
This is my code :
这是我的代码：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>CityInfo</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="http://code.jquery.com/mobile/1.3.1/jquery.mobile-1.3.1.min.css" />
<link href="photoSwipe/jquery-mobile.css" type="text/css" rel="stylesheet" />
<link href="photoSwipe/photoswipe.css" type="text/css" rel="stylesheet" />
<script type="text/javascript" src="photoSwipe/klass.min.js"></script>
<script src="http://code.jquery.com/jquery-1.9.1.min.js"></script>
<script src="http://code.jquery.com/mobile/1.3.1/jquery.mobile-1.3.1.min.js"></script>
<script type="text/javascript" src="photoSwipe/code.photoswipe.jquery-3.0.5.min.js"></script>
<script type="text/javascript">
//PhotoSwipe
/*
* IMPORTANT!!!
* REMEMBER TO ADD rel="external" to your anchor tags.
* If you don't this will mess with how jQuery Mobile works
*/
(function(window, $, PhotoSwipe){
$(document).ready(function(){
$('div.gallery-page')
.on('pageshow', function(e){
var
currentPage = $(e.target),
options = {},
photoSwipeInstance = $("ul.gallery a", e.target).photoSwipe(options, currentPage.attr('id'));
return true;
})
.on('pagehide', function(e){
var
currentPage = $(e.target),
photoSwipeInstance = PhotoSwipe.getInstance(currentPage.attr('id'));
if (typeof photoSwipeInstance != "undefined" && photoSwipeInstance != null) {
PhotoSwipe.detatch(photoSwipeInstance);
}
return true;
});
});
}(window, window.jQuery, window.Code.PhotoSwipe));
</script>
</head>
<body>
<div id="fb-root"></div>
<script>
var albumPhotos = new Array();
var albumThumbnails = new Array();
// start the entire process
window.fbAsyncInit = function() {
// init the FB JS SDK
FB.init({
appId : '564984346887426', // App ID from the app dashboard
channelUrl : 'channel.html', // Channel file for x-domain comms
status : true, // Check Facebook Login status
xfbml : true // Look for social plugins on the page
});
FB.api('169070991963/albums', checkForErrorFirst(getAlbums));
}
// checkForErrorFirst wraps your function around the error checking code first
// if there is no response, then your code will not be called
// this allows you to just write the juicy working code
// and not worry about error checking
function checkForErrorFirst(myFunc) {
return function(response) {
if (!response || response.error) {
alert("Noo!!");
} else {
myFunc(response);
}
};
}
function getAlbums(response) {
for (var i=0; i < response.data.length; ++i) {
processAlbum(response.data[i], i);
}
}
function processAlbum(album, i) {
FB.api(album.id + "/photos", checkForErrorFirst(populateAlbum(album, i)));
}
function populateAlbum(album, i) {
return function(response) {
for (var k=0; k < response.data.length; ++k){
albumThumbnails[i] = albumThumbnails[i]||[];
albumThumbnails[i][k] = response.data[k].picture;
albumPhotos[i] = albumPhotos[i]||[];
albumPhotos[i][k] = response.data[k].source;
}
// now that we've populated the album thumbnails and photos, we can render the album
FB.api(album.cover_photo, checkForErrorFirst(renderAlbum(album, i)));
};
}
function renderAlbum(album, i) {
return function(response) {
var albumName = album.name;
var albumCover = album.cover_photo;
var albumId = album.id;
var numberOfPhotos = album.count;
// render photos
$(".albums").append('<li>'+
'<a href="#Gallery' + i + '"' + 'data-transition="slidedown">'+
'<img src= "' + response.picture + '" />'+
'<h2>' + albumName + '</h2>'+
'<p>' + "Number of Photos: " + numberOfPhotos +'</p>'+
'</a>'+
'</li>').listview('refresh');
$("#Home").after('<div data-role="page" data-add-back-btn="true" id=Gallery'+ i +
' class="gallery-page"> ' +
' <div data-role="header"><h1>Gallery</h1></div> ' + ' <div data-role="content"> ' +
' <ul class="gallery"></ul> ' + ' </div> ' +
' </div> ');
for(var x=0; x < albumPhotos[i].length; x++)
$('#Gallery' + i + ' .gallery').append('<li><a href="' + albumPhotos[i][x]
+ '" rel="external"><img src="' + albumThumbnails[i][x] + '"' + '/> </a> </li>');
};
}
// Load the SDK asynchronously
(function(d, s, id){
var js, fjs = d.getElementsByTagName(s)[0];
if (d.getElementById(id)) {return;}
js = d.createElement(s); js.id = id;
js.src = "//connect.facebook.net/en_US/all.js";
fjs.parentNode.insertBefore(js, fjs);
}(document, 'script', 'facebook-jssdk'));
</script>
<div data-role="page" id="Home" data-theme="c">
<div data-role="content">
<h2 id="banner" align = "center">Photo Albums</h2>
<ul data-role="listview" data-inset="true" class="albums">
</ul>
</div>
</div>
</body>
</html>
I think the important part here is this:
我认为这里的重要部分是：
$("#Home").after('<div data-role="page" data-add-back-btn="true" id=Gallery'+ i +
' class="gallery-page"> ' +
' <div data-role="header"><h1>Gallery</h1></div> ' + ' <div data-role="content"> ' +
' <ul class="gallery"></ul> ' + ' </div> ' +
' </div> ');
where as you can see i give the correct class name class="gallery-page"to every dynamically generated div.
如您所见，我class="gallery-page"为每个动态生成的 div提供了正确的类名。
I will also give here 2 screenshots when debugging with chrome , one from the example code that is working and one from my code , just to show you that the elements on the final html page look identical..
在使用 chrome 进行调试时，我还将在此处提供 2 个屏幕截图，一个来自正在运行的示例代码，另一个来自我的代码，只是为了向您展示最终 html 页面上的元素看起来相同..
Example code(the example code given from the site has 2 galleries of photos , i expanded one to see how are the html elements):
示例代码（该站点给出的示例代码有 2 张照片画廊，我展开了一张照片以查看 html 元素如何）：
My code(because i import the albums from a facebook page , here we have a lot more galleries. Again i expand one of them to show you that the html elements are identical to the example , and i use the same classes and divs):
我的代码（因为我从 facebook 页面导入相册，这里我们有更多的画廊。我再次展开其中之一以向您展示 html 元素与示例相同，并且我使用相同的类和 div）：
In order to enlarge the images press ctrl + (+). To go back to normal press ctrl + (-).
要放大图像，请按 ctrl + (+)。要恢复正常，请按 ctrl + (-)。
If you have ANY idea why the javascript is not executed , please leave a hint. I am trying to fix this for more than a week without any success. Thank you very very much for reading till here.
如果您知道为什么不执行 javascript，请留下提示。我试图解决这个问题一个多星期没有任何成功。非常感谢您阅读到这里。
回答by Brad M
live()is removed from jQuery 1.9, and I see this tag in your code.
live()已从 jQuery 1.9 中删除，我在您的代码中看到了此标记。
jquery-1.9.1.min.js
回答by Omar
Binding events to dynamically create items should be like this.
绑定事件以动态创建项目应该是这样的。
$(document).on('event', '.element', function () { magic });
This code applies for all types of dynamic elements.
此代码适用于所有类型的动态元素。
Another important note, don't use .ready/ $(function($)with jQuery Mobile. Use jQuery Mobile events.
另一个重要的注意事项，不要在 jQuery Mobile 中使用.ready/ $(function($)。使用 jQuery Mobile事件。
回答by anacarolinats
You must change where you use liveby on
你必须改变你使用live的地方on
$(document)
.on('pageshow', 'div.gallery-page', function(e){
var
currentPage = $(e.target),
options = {},
photoSwipeInstance = $("ul.gallery a", e.target).photoSwipe(options, currentPage.attr('id'));
return true;
})
.on('pagehide', 'div.gallery-page', function(e){
var
currentPage = $(e.target),
photoSwipeInstance = PhotoSwipe.getInstance(currentPage.attr('id'));
if (typeof photoSwipeInstance != "undefined" && photoSwipeInstance != null) {
PhotoSwipe.detatch(photoSwipeInstance);
}
return true;
});
});
documentation: http://api.jquery.com/on/
