我已经尝试过但没有找到...我怎样才能更改下面使用on()方法编写的方法?
//Get old posts when scrolling down
$(window).scroll(function(){
if($(window).scrollTop()==($(document).height()-$(window).height())){
//Get older posts
$.ajax({
type: 'POST',
url: 'action/getoldposts.php',
success: function(oldposts){
//Append #postsDiv
$('#postsDiv').append(oldposts);
}
});
}
});
提前致谢!
丹尼斯
更新1
我将代码更改为以下内容,但随后动态创建的内容没有功能 - 我是否遗漏了一些静态引用?
$(window).on('scroll',function(){
if($(window).scrollTop()==($(document).height()-$(window).height())){
//Get older posts
$.ajax({
type: 'POST',
url: 'action/getoldposts.php',
success: function(oldposts){
//Append #postsDiv
$('#postsDiv').append(oldposts);
}
});
}
});
更新2
动态创建的元素错过了以下功能:
$('#postsDiv').on('keydown', '.commenttext', function(e) {
if ((e.which == 13) && !e.shiftKey) {
comment($(this));
return false;
}
});
方法comment()如下所示:
//Function to comment on a post
function comment(commenttext)
{
//Get postid
var commenttextid=commenttext.attr('id');
var postid=commenttextid.replace("commenttext", "");
//Get commenttext
var commenttext=$('#commenttext'+postid).val();
//Ajax of commenttext is not empty
if(commenttext!="")
{
$.ajax({
type: 'POST',
url: 'action/comment.php',
data: 'commenttext='+commenttext+'&postid='+postid,
success: function(data){
//Prepend comments
$('#comments'+postid).hide().prepend(
'<div class="comment"><hr/>'+commenttext.replace( /\n/g, '<br/>' )+'</div'
).fadeIn('slow');
//Remove from textarea what was typed in
$('#commenttext'+postid).val('');
//Focus on textarea
$('#commenttext'+postid).focus();
}
}).error(function(){
alert('The comment could not be sent - please try again later.');
});
}
else
{
//If the commenttext is empty, focus on the textarea nonetheless
$('#commenttext'+postid).focus();
}
}
评论会附加到新加载的内容中,但显然错过了ajax,因为当我重新加载页面时,它已不再存在了。
答案 0 :(得分:5)
1)我几天前制作了类似的代码。在这里,我将页面滚动事件分配给一个函数,该函数检查用户离底部多少像素。如果用户的像素少于300或更少,则会触发loadMoreArticles()函数:
$(document).scroll(function(){
if(($(document).height()-$(window).height()-$(document).scrollTop()) < 300){
console.log('Scrolled to bottom');
ArticleList.loadMoreArticles();
} else {
console.log('Scroll '+$(document).height()+' - '+$(window).height()+' - ' +$(document).scrollTop());
}
});
console.log()函数显示它以正确的方式实现
2)您可以在添加新内容后再次添加功能。像这样:
$(window).on('scroll',function(){
if($(window).scrollTop()==($(document).height()-$(window).height())){
//Get older posts
$.ajax({
type: 'POST',
url: 'action/getoldposts.php',
success: function(oldposts){
//Append #postsDiv
$('#postsDiv').append(oldposts);
//Remove all functionalities
$('#postsDiv').off('keydown');
//Add all functionalities again
$('#postsDiv').on('keydown', '.commenttext', function(e) {
if ((e.which == 13) && !e.shiftKey) {
comment($(this));
return false;
}
});
}
});
}
});
答案 1 :(得分:-3)
$(window).on('scroll', function(){
// ...
});