这是关于以下jQuery分页代码的： https://github.com/gbirke/jquery_pagination/blob/master/src/jquery.pagination.js
已经对原始代码进行了一些自定义，这是一篇关于所做更改的相关帖子。
这是现在更新的代码：https://jsfiddle.net/a6gx5z2o/13/
/**
* This jQuery plugin displays pagination links inside the selected elements.
*
* This plugin needs at least jQuery 1.4.2
*
* @author Gabriel Birke (birke *at* d-scribe *dot* de)
* @version 2.2
* @param {int} maxentries Number of entries to paginate
* @param {Object} opts Several options (see README for documentation)
* @return {Object} jQuery Object
*/
(function($){
/**
* @class Class for calculating pagination values
*/
$.PaginationCalculator = function(maxentries, opts) {
this.maxentries = maxentries;
this.opts = opts;
};
$.extend($.PaginationCalculator.prototype, {
/**
* Calculate the maximum number of pages
* @method
* @returns {Number}
*/
numPages:function() {
return Math.ceil(this.maxentries/this.opts.items_per_page);
},
/**
* Calculate start and end point of pagination links depending on
* current_page and num_display_entries.
* @returns {Array}
*/
getInterval:function(current_page) {
var ne_half = Math.floor(this.opts.num_display_entries/2);
var np = this.numPages();
var upper_limit = np - this.opts.num_display_entries;
var start = current_page > ne_half ? Math.max( Math.min(current_page - ne_half, upper_limit), 0 ) : 0;
var end = current_page > ne_half?Math.min(current_page+ne_half + (this.opts.num_display_entries % 2), np):Math.min(this.opts.num_display_entries, np);
return {start:start, end:end};
}
});
// Initialize jQuery object container for pagination renderers
$.PaginationRenderers = {};
/**
* @class Default renderer for rendering pagination links
*/
$.PaginationRenderers.defaultRenderer = function(maxentries, opts) {
this.maxentries = maxentries;
this.opts = opts;
this.pc = new $.PaginationCalculator(maxentries, opts);
};
$.extend($.PaginationRenderers.defaultRenderer.prototype, {
/**
* Helper function for generating a single link (or a span tag if it's the current page)
* @param {Number} page_id The page id for the new item
* @param {Number} current_page
* @param {Object} appendopts Options for the new item: text and classes
* @returns {jQuery} jQuery object containing the link
*/
createLink:function(page_id, current_page, appendopts){
var lnk, np = this.pc.numPages();
page_id = page_id<0?0:(page_id<np?page_id:np-1); // Normalize page id to sane value
appendopts = $.extend({text:page_id+1, classes:""}, appendopts||{});
var weekamount;
weekamount = Math.ceil(appendopts.text / 7) * 7;
weekdaysamount = weekamount - 7;
if(appendopts.text > 7) {
appendopts.text = appendopts.text - weekdaysamount;
}
if(page_id == current_page){
lnk = $("<span class='current'>" + appendopts.text + "</span>");
}
else
{
lnk = $("<a>" + appendopts.text + "</a>")
.attr('href', this.opts.link_to.replace(/__id__/,page_id));
}
if(appendopts.classes){ lnk.addClass(appendopts.classes); }
if(appendopts.rel){ lnk.attr('rel', appendopts.rel); }
lnk.addClass('page' + page_id);
lnk.data('page_id', page_id);
return lnk;
},
// Generate a range of numeric links
appendRange:function(container, current_page, start, end, opts) {
var i;
for(i=start; i<end; i++) {
this.createLink(i, current_page, opts).appendTo(container);
}
},
getLinks:function(current_page, eventHandler) {
var begin, end,
interval = this.pc.getInterval(current_page),
np = this.pc.numPages(),
fragment = $("<div class='pagination'></div>");
// Generate "Previous"-Link
currentPrevPageCalc = Math.ceil(current_page / 7) * 7;
currentPrevPage = currentPrevPageCalc - 14;
fragment.append(this.createLink(currentPrevPage, current_page, {text:this.opts.prev_text, classes:"prev",rel:"prev"}));
// Generate starting points
if (interval.start > 0 && this.opts.num_edge_entries > 0)
{
end = Math.min(this.opts.num_edge_entries, interval.start);
this.appendRange(fragment, current_page, 0, end, {classes:'sp'});
if(this.opts.num_edge_entries < interval.start && this.opts.ellipse_text)
{
$("<span>"+this.opts.ellipse_text+"</span>").appendTo(fragment);
}
}
// Generate interval links
this.appendRange(fragment, current_page, interval.start, interval.end);
// Generate ending points
if (interval.end < np && this.opts.num_edge_entries > 0)
{
if(np-this.opts.num_edge_entries > interval.end && this.opts.ellipse_text)
{
$("<span>"+this.opts.ellipse_text+"</span>").appendTo(fragment);
}
begin = Math.max(np-this.opts.num_edge_entries, interval.end);
this.appendRange(fragment, current_page, begin, np, {classes:'ep'});
}
// Generate "Next"-Link
currentNextPage = Math.ceil(current_page / 7) * 7;
fragment.append(this.createLink(currentNextPage, current_page, {text:this.opts.next_text, classes:"next",rel:"next"}));
$('a', fragment).click(eventHandler);
return fragment;
}
});
// Extend jQuery
$.fn.pagination = function(maxentries, opts){
opts = $.extend({
items_per_page:7,
num_display_entries:35,
current_page:1,
num_edge_entries:0,
link_to:"#",
prev_text:"<<",
next_text:">>",
ellipse_text:"...",
prev_show_always:true,
next_show_always:true,
renderer:"defaultRenderer",
show_if_single_page:true,
load_first_page:true,
callback:function(){return false;}
},opts||{});
var containers = this,
renderer, links, current_page;
/**
* This is the event handling function for the pagination links.
* @param {int} page_id The new page number
*/
function paginationClickHandler(evt){
var links,
new_current_page = $(evt.target).data('page_id'),
continuePropagation = selectPage(new_current_page);
if (!continuePropagation) {
evt.stopPropagation();
}
return continuePropagation;
}
/**
* This is a utility function for the internal event handlers.
* It sets the new current page on the pagination container objects,
* generates a new HTMl fragment for the pagination links and calls
* the callback function.
*/
function selectPage(new_current_page) {
// update the link display of a all containers
containers.data('current_page', new_current_page);
links = renderer.getLinks(new_current_page, paginationClickHandler);
containers.empty();
links.appendTo(containers);
// call the callback and propagate the event if it does not return false
var continuePropagation = opts.callback(new_current_page, containers);
return continuePropagation;
}
// -----------------------------------
// Initialize containers
// -----------------------------------
current_page = parseInt(opts.current_page, 10);
containers.data('current_page', current_page);
// Create a sane value for maxentries and items_per_page
maxentries = (!maxentries || maxentries < 0)?1:maxentries;
opts.items_per_page = (!opts.items_per_page || opts.items_per_page < 0)?1:opts.items_per_page;
if(!$.PaginationRenderers[opts.renderer])
{
throw new ReferenceError("Pagination renderer '" + opts.renderer + "' was not found in jQuery.PaginationRenderers object.");
}
renderer = new $.PaginationRenderers[opts.renderer](maxentries, opts);
// Attach control events to the DOM elements
var pc = new $.PaginationCalculator(maxentries, opts);
var np = pc.numPages();
containers.off('setPage').on('setPage', {numPages:np}, function(evt, page_id) {
if(page_id >= 0 && page_id < evt.data.numPages) {
selectPage(page_id);
}
});
containers.off('prevPage').on('prevPage', function(evt){
var current_page = $(this).data('current_page');
if (current_page > 0) {
selectPage(current_page - 1);
}
return false;
});
containers.off('nextPage').on('nextPage', {numPages:np}, function(evt){
var current_page = $(this).data('current_page');
if(current_page < evt.data.numPages - 1) {
selectPage(current_page + 1);
}
return false;
});
containers.off('currentPage').on('currentPage', function(){
var current_page = $(this).data('current_page');
selectPage(current_page);
return false;
});
// When all initialisation is done, draw the links
links = renderer.getLinks(current_page, paginationClickHandler);
containers.empty();
if(np > 1 || opts.show_if_single_page) {
links.appendTo(containers);
}
// call callback function
if(opts.load_first_page) {
opts.callback(current_page, containers);
}
}; // End of $.fn.pagination block
})(jQuery);
function handlePaginationClick(new_page_index, pagination_container) {
console.log(new_page_index);
}
$.PaginationCalculator.prototype.getInterval = function (current_page) {
var num_display_entries = this.opts.num_display_entries;
var start = Math.floor(current_page / num_display_entries) * num_display_entries;
var end = Math.min(start + num_display_entries, this.numPages());
return { start: start, end: end };
};
$("#News-Pagination").pagination(150, {
items_per_page:7,
num_display_entries: 7,
callback:handlePaginationClick
});
它的作用是有 1-7 个页面的组，当您单击下一步时，它会转到下一组页面(标记为 1 - 7(。
一切正常，除了当您在该组的第一页 (1( 时。当您在第 1 页上时，您无法单击下一步按钮。
有人对如何解决这个问题有建议吗？
非常感谢！
将整个插件代码转储到您的问题中并期望有人搜索它并尝试找到您所做的所有修改有点多。我当然不准备这样做。
但是，我想指出您的方法的一些问题：
首先，您不应该直接修改插件源代码。在我给你的原始回答中，我确保保持插件代码不变，并明确覆盖插件代码之外的$.PaginationCalculator.prototype.getInterval实现。任何拿起你的代码的人都不会知道这个插件代码已经被修改了，当行为不符合文档时，他们会非常困惑。
其次，您不应该到处硬编码7。此插件代码旨在支持不同的配置。通过在7中进行硬编码，您已确保此代码对于使用未7num_display_entries初始化插件的任何人都会中断。
第三(与第二点类似(，您不应该修改插件代码中的默认选项。例如，插件设计允许您在初始化时传递自己的prev_text和next_text值。
虽然我不会尝试调试您的修改，但我确实查看了原始插件源代码，看看是否可以满足您的新要求。我相信我只需更改一行代码即可满足您的要求。我只是更改了在$.PaginationRenderers.defaultRenderer.prototype.createLink方法中设置的默认链接文本。同样，为了保留插件源代码，我建议显式覆盖要修改的方法。我已经复制了该方法，并添加了有关我更改的代码行的注释：
$.PaginationRenderers.defaultRenderer.prototype.createLink = function(page_id, current_page, appendopts) {
var lnk, np = this.pc.numPages();
page_id = page_id<0?0:(page_id<np?page_id:np-1); // Normalize page id to sane value
appendopts = $.extend({
//text: page_id+1,
// Note: This is the only line of code I have changed from the original.
// It ensures that the link text is only ever within a range of 1 - num_display_entries
text: (page_id % this.opts.num_display_entries) + 1,
classes: ""
}, appendopts||{});
if(page_id == current_page){
lnk = $("<span class='current'>" + appendopts.text + "</span>");
}
else
{
lnk = $("<a>" + appendopts.text + "</a>")
.attr('href', this.opts.link_to.replace(/__id__/,page_id));
}
if(appendopts.classes){ lnk.addClass(appendopts.classes); }
if(appendopts.rel){ lnk.attr('rel', appendopts.rel); }
lnk.data('page_id', page_id);
return lnk;
};
我创建了一个 JS 小提琴演示以供参考。