Question

因此，我在第一行有一个时间轴部分，该行具有不同的html结构，而另一行有左侧和右侧视图。奇数侧将在左侧，而右侧将在右侧。但是，当我使用$ loop-> first时，根本没有错误。但是当我使用$ loop-> even或$ loop-> odd时，会显示如下错误：

未定义的属性：stdClass :: $ even 要么未定义的属性：stdClass :: $ odd

这是刀片视图：

                                @if($loop->first)
                                <div class="row align-items-center how-it-works d-flex">
                                  <div class="col-2 text-center bottom d-inline-flex justify-content-center align-items-center">
                                    <div class="circle font-weight-bold">{!! $tl->id !!}</div>
                                  </div>
                                  <div class="col-6">
                                    <h5>{!! $tl->company !!}</h5>
                                    <p>{!! $tl->description !!}</p>
                                  </div>
                                </div>
                                <!--path between 1-2-->
                                <div class="row timeline">
                                  <div class="col-2">
                                    <div class="corner top-right"></div>
                                  </div>
                                  <div class="col-8">
                                    <hr/>
                                  </div>
                                  <div class="col-2">
                                    <div class="corner left-bottom"></div>
                                  </div>
                                </div>
                                @elseif($loop->even)
                                <!--second section-->
                                <div class="row align-items-center justify-content-end how-it-works d-flex">
                                  <div class="col-6 text-right">
                                    <h5>{!! $tl->company !!}</h5>
                                    <p>{!! $tl->description !!}</p>
                                  </div>
                                  <div class="col-2 text-center full d-inline-flex justify-content-center align-items-center">
                                    <div class="circle font-weight-bold">{!! $tl->id !!}</div>
                                  </div>
                                </div>
                                <!--path between 2-3-->
                                <div class="row timeline">
                                  <div class="col-2">
                                    <div class="corner right-bottom"></div>
                                  </div>
                                  <div class="col-8">
                                    <hr/>
                                  </div>
                                  <div class="col-2">
                                    <div class="corner top-left"></div>
                                  </div>
                                </div>
                                @elseif($loop->iteration % 2 != 0)
                                <div class="row align-items-center how-it-works d-flex">
                                    <div class="col-2 text-center bottoms d-inline-flex justify-content-center align-items-center">
                                      <div class="circle font-weight-bold">{!! $tl->id !!}</div>
                                    </div>
                                    <div class="col-6">
                                      <h5>{!! $tl->company !!}</h5>
                                      <p>{!! $tl->description !!}</p>
                                    </div>
                                  </div>
                                  <!--path between 1-2-->
                                  <div class="row timeline">
                                    <div class="col-2">
                                      <div class="corner top-right"></div>
                                    </div>
                                    <div class="col-8">
                                      <hr/>
                                    </div>
                                    <div class="col-2">
                                      <div class="corner left-bottom"></div>
                                    </div>
                                  </div>
                                @elseif($loop->last)
                                <div class="row align-items-center how-it-works d-flex">
                                    <div class="col-2 text-center top d-inline-flex justify-content-center align-items-center">
                                      <div class="circle font-weight-bold">{!! $tl->id !!}</div>
                                    </div>
                                    <div class="col-6">
                                      <h5>{!! $tl->company !!}</h5>
                                      <p>{!! $tl->description !!}</p>
                                    </div>
                                  </div>
                                @endif
                                @endforeach

这是控制器：

public function index()
    {
      $desc = Home::first();
      $users = User::first();
      $site = Site::first();
      $timeline = Timeline::get();
      $services = Services::get();
      $port = Portfolio::get();
      $cat = DB::Table("cat_port")->get();
      $news = DB::table('news')->join('category', 'category.name', '=', 'news.category')->selectRaw('news.*, category.*, category.url as curl, news.created_at as created')->orderBy('created', 'DESC')->get()->take(3);
        return view('home', ['desc' => $desc, 'timeline' => $timeline, 'users' => $users, 'services' => $services, 'port' => $port, 'cat' => $cat, 'news' => $news, 'site' => $site, 'isHome' => true]);
    }

我可以使用$ loop-> iteration，但是如果我使用它，似乎最后一行会出现问题，因为当我使用它时，$ loop-> last内的脚本不会出现。有人可以向我解释如何解决此问题吗？

Answer 1

奇数和偶数属性仅在laravel 5.8中可用：

https://laravel.com/docs/5.7/blade#the-loop-variable

https://laravel.com/docs/5.8/blade#the-loop-variable

也许升级会有所帮助。

$ loop->偶数或$ loop-> odd不起作用

1 个答案: