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本篇內(nèi)容主要講解“PHP框架Laravel插件Pagination實現(xiàn)自定義分頁的方法”,感興趣的朋友不妨來看看。本文介紹的方法操作簡單快捷,實用性強。下面就讓小編來帶大家學(xué)習(xí)“PHP框架Laravel插件Pagination實現(xiàn)自定義分頁的方法”吧!
Laravel 的分頁很方便,其實擴展起來也挺容易的,下面就來做個示例,擴展一下 paginate() 和 simplePaginate() 方法,來實現(xiàn)我們自定義分頁樣式,比如顯示 "上一頁" 和 "下一頁" ,而不是 "《" 和 "》" ,當(dāng)然擴展的方法掌握了你就可以肆無忌憚的擴展一個你想要的分頁了,比如跳轉(zhuǎn)到某一頁,分頁顯示一共多少記錄,當(dāng)前顯示的記錄范圍等等巴拉巴拉的。
5.1和5.2應(yīng)該是同樣的方法,我這里用的是5.2的版本。文檔告訴我們 Paginator 對應(yīng)于查詢語句構(gòu)造器和 Eloquent 的 simplePaginate 方法,而 LengthAwarePaginator 則等同于 paginate 方法。那我們還是來看下源碼,具體這個 paginate 是如何實現(xiàn) render() 的,
Illuminate/Pagination/LengthAwarePaginator.php
<?php namespace Illuminate\Pagination; ...... class LengthAwarePaginator extends AbstractPaginator implements Arrayable, ArrayAccess, Countable, IteratorAggregate, JsonSerializable, Jsonable, LengthAwarePaginatorContract { ...... public function render(Presenter $presenter = null) { if (is_null($presenter) && static::$presenterResolver) { $presenter = call_user_func(static::$presenterResolver, $this); } $presenter = $presenter ?: new BootstrapThreePresenter($this); return $presenter->render(); } ...... }
render() 中傳入的是一個 Presenter 的實例,并調(diào)用這個實例化的 render 方法來實現(xiàn)分頁的顯示的。如果沒有則調(diào)用 BootstrapThreePresenter 中 render() 的,來看看 BootstrapThreePresenter 是干嘛的
Illuminate/Pagination/BootstrapThreePresenter.php
<?php namespace Illuminate\Pagination; use Illuminate\Support\HtmlString; use Illuminate\Contracts\Pagination\Paginator as PaginatorContract; use Illuminate\Contracts\Pagination\Presenter as PresenterContract; class BootstrapThreePresenter implements PresenterContract { use BootstrapThreeNextPreviousButtonRendererTrait, UrlWindowPresenterTrait; /** * The paginator implementation. * * @var \Illuminate\Contracts\Pagination\Paginator */ protected $paginator; /** * The URL window data structure. * * @var array */ protected $window; /** * Create a new Bootstrap presenter instance. * * @param \Illuminate\Contracts\Pagination\Paginator $paginator * @param \Illuminate\Pagination\UrlWindow|null $window * @return void */ public function __construct(PaginatorContract $paginator, UrlWindow $window = null) { $this->paginator = $paginator; $this->window = is_null($window) ? UrlWindow::make($paginator) : $window->get(); } /** * Determine if the underlying paginator being presented has pages to show. * * @return bool */ public function hasPages() { return $this->paginator->hasPages(); } /** * Convert the URL window into Bootstrap HTML. * * @return \Illuminate\Support\HtmlString */ public function render() { if ($this->hasPages()) { return new HtmlString(sprintf( '<ul class="pagination">%s %s %s</ul>', $this->getPreviousButton(), $this->getLinks(), $this->getNextButton() )); } return ''; } ...... }
這里可以看到 BootstrapThreePresenter 實現(xiàn)了 PresenterContract 的接口, render() 才是分頁顯示的真正實現(xiàn),構(gòu)造方法中的第一個參數(shù) PaginatorContract 其實就是一個 Paginator 我們繼續(xù)看下 PresenterContract 也就是 Presenter 接口中定義了什么方法需要實現(xiàn)
illuminate/contracts/Pagination/Presenter.php
<?php namespace Illuminate\Contracts\Pagination; interface Presenter { /** * Render the given paginator. * * @return \Illuminate\Contracts\Support\Htmlable|string */ public function render(); /** * Determine if the underlying paginator being presented has pages to show. * * @return bool */ public function hasPages(); }
其中定義了 render 和 hasPages 方法需要實現(xiàn)
好了,那我們現(xiàn)在已經(jīng)很清晰了,我們要自定義分頁的顯示,那么就要寫一個我們自己的 Presenter 來實現(xiàn)接口中的 render() 和 hasPages() 就可以了。
首先就來簡單的實現(xiàn)一個paginate(),顯示出來"上一頁"和"下一頁",中間是分頁數(shù)字的例子。
新建文件如下(個人習(xí)慣)
app/Foundations/Pagination/CustomerPresenter.php
<?php namespace App\Foundations\Pagination; use Illuminate\Contracts\Pagination\Presenter as PresenterContract; use Illuminate\Contracts\Pagination\LengthAwarePaginator as PaginatorContract; use Illuminate\Pagination\UrlWindow; use Illuminate\Support\HtmlString; use Illuminate\Pagination\BootstrapThreeNextPreviousButtonRendererTrait; use Illuminate\Pagination\UrlWindowPresenterTrait; class CustomerPresenter implements PresenterContract { use BootstrapThreeNextPreviousButtonRendererTrait, UrlWindowPresenterTrait; protected $paginator; protected $window; /** * Create a new Bootstrap presenter instance. * * @param \Illuminate\Contracts\Pagination\Paginator $paginator * @param \Illuminate\Pagination\UrlWindow|null $window * @return void */ public function __construct(PaginatorContract $paginator, UrlWindow $window = null) { $this->paginator = $paginator; $this->window = is_null($window) ? UrlWindow::make($paginator) : $window->get(); } /** * Determine if the underlying paginator being presented has pages to show. * * @return bool */ public function hasPages() { return $this->paginator->hasPages(); } /** * Convert the URL window into Bootstrap HTML. * * @return \Illuminate\Support\HtmlString */ public function render() { if ($this->hasPages()) { return new HtmlString(sprintf( '<ul class="pagination">%s %s %s</ul>', $this->getPreviousButton('上一頁'),//具體實現(xiàn)可以查看該方法 $this->getLinks(), $this->getNextButton('下一頁')//具體實現(xiàn)可以查看該方法 )); } return ''; } /** * Get HTML wrapper for an available page link. * * @param string $url * @param int $page * @param string|null $rel * @return string */ protected function getAvailablePageWrapper($url, $page, $rel = null) { $rel = is_null($rel) ? '' : ' rel="' . $rel . '"'; return '<li><a href="' . htmlentities($url) . '"' . $rel . '>' . $page . '</a></li>'; } /** * Get HTML wrapper for disabled text. * * @param string $text * @return string */ protected function getDisabledTextWrapper($text) { return '<li class="disabled hide"><span>' . $text . '</span></li>'; } /** * Get HTML wrapper for active text. * * @param string $text * @return string */ protected function getActivePageWrapper($text) { return '<li class="active"><span>' . $text . '</span></li>'; } /** * Get a pagination "dot" element. * * @return string */ protected function getDots() { return $this->getDisabledTextWrapper('...'); } /** * Get the current page from the paginator. * * @return int */ protected function currentPage() { return $this->paginator->currentPage(); } /** * Get the last page from the paginator. * * @return int */ protected function lastPage() { return $this->paginator->lastPage(); } }
就這么簡單,主要就是 render() 方法,如果項目中需要修改分頁樣式,或者添加分頁跳轉(zhuǎn)之類的需求只要重寫其中的各項顯示的方法中的html元素就可以了,很靈活,在blade模板中也需要修該,比如我們的 Paginator 叫 $users ,默認的分頁顯示是這樣的:
{!! $users->render() !!}
修改成我們自定義后的分頁顯示:
{!! with(new \App\Foundations\Pagination\CustomerPresenter($categories))->render() !!}
好了,這樣在頁面應(yīng)該就可以看到分頁鏈接中含有 "上一頁"和"下一頁"加數(shù)字的樣式了。
那么如果擴展simplePaginate?其實很簡單,只要繼承剛才的 CustomerPresenter ,實現(xiàn) hasPages 和 render ,至于為什么可以按照我上面查看源碼的方式看一下就知道了,比如我們改成"上一篇"和"下一篇"
新建App\Foundations\Pagination\CustomerSimplePresenter.php
<?php namespace App\Foundations\Pagination; use Illuminate\Support\HtmlString; use Illuminate\Contracts\Pagination\Paginator as PaginatorContract; class CustomerSimplePresenter extends CustomerPresenter { /** * Create a simple Bootstrap 3 presenter. * * @param \Illuminate\Contracts\Pagination\Paginator $paginator * @return void */ public function __construct(PaginatorContract $paginator) { $this->paginator = $paginator; } /** * Determine if the underlying paginator being presented has pages to show. * * @return bool */ public function hasPages() { return $this->paginator->hasPages() && count($this->paginator->items()) > 0; } /** * Convert the URL window into Bootstrap HTML. * * @return \Illuminate\Support\HtmlString */ public function render() { if ($this->hasPages()) { return new HtmlString(sprintf( '<ul class="pager">%s %s</ul>', $this->getPreviousButton('上一篇'), $this->getNextButton('下一篇') )); } return ''; } }
分頁顯示:
{!! with(new \App\Foundations\Pagination\CustomerSimplePresenter($categories))->render() !!}
方法就是這個方法,具體修改按照自己需求重寫其中對應(yīng)的顯示html元素的方法就可以了。
到此,相信大家對“PHP框架Laravel插件Pagination實現(xiàn)自定義分頁的方法”有了更深的了解,不妨來實際操作一番吧!這里是億速云網(wǎng)站,更多相關(guān)內(nèi)容可以進入相關(guān)頻道進行查詢,關(guān)注我們,繼續(xù)學(xué)習(xí)!
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