为什么未在刀片视图中显示编辑表单？

Question

我正在使用Laravel 5.6，在我的应用中，我具有显示带有编辑和删除按钮index.blade.php的刀片的类别

<div class="col-md-9">
            <div class="float-right">
            <a href="{{route('categories.form')}}" class="btn btn-primary">New</a>
        </div>
        <h1 style="font-size: 2.2rem">Vehicle Categories</h1>
        <hr/>
        <!--add here-->

        <div class="row">
@foreach($images as $image)

                <div class="col-md-4 col-lg-3" style="margin-bottom: 20px">
                    <div class="card">
                        <img class="card-img-top"
                             src="{{url($image->categoryimage? 'images/'.$image->categoryimage:'images/noimage.jpg')}}"
                             alt="{{$image->name}}" width="100%" height="180px"/>
                        <div class="card-body">
                            <h6 class="card-title text-center">{{ucwords($image->categoryname)}}</h6>
                        </div>
                        <ul class="list-group list-group-flush">
                            <li class="list-group-item">
                                <form id="frm_{{$image->id}}"
                                      action="{{url('delete/'.$image->id)}}"
                                      method="post" style="padding-bottom: 0px;margin-bottom: 0px">
                                    <div class="row">
                                        <div class="col-sm-6">
                                            <a href="javascript:if(confirm('Are you sure want to delete?')) $('#frm_{{$image->id}}').submit()"
                                               class="btn btn-danger btn-sm btn-block">Delete</a>
                                        </div>
                                        <div class="col-sm-6">
                                            <a href="{{url('category/update/'.$image->id)}}"
                                               class="btn btn-primary btn-sm btn-block">Edit</a>
                                        </div>
                                        <input type="hidden" name="_method" value="delete"/>
                                        {{csrf_field()}}
                                    </div>
                                </form>
                            </li>
                        </ul>
                    </div>
                </div>
            @endforeach

我的编辑表单在form.blade.php中，具有新类别添加表单和编辑表单，

<div class="col-md-9">


            <h1>{{isset($image)?'Edit':'New'}}  Category</h1>

            <hr/>
            @if(isset($image))
    <form method="PUT" action="{{url('updateform')}}" enctype="multipart/form-data">
    <input type="hidden" name="_method" value="put">
@else
   <form method="POST" action="http://localhost:8000/create" accept-charset="UTF-8" enctype="multipart/form-data"><input name="_token" type="hidden" value="1LLYc0D1spmVSFMboLDjGM9MR4O5APVwng7giejx">
                                {{csrf_field()}}
@endif

                                <div class="form-group row required">
                <label for="description" class="col-form-label col-md-3 col-lg-2">Description</label>
                <div class="col-md-8">
                    <input class="form-control" autofocus placeholder="Description" name="description" type="text" id="description">

                </div> 
            </div>

                        <div class="form-group row">
                <label for="image" class="col-form-label col-md-3">Image</label>
                <div class="col-md-5">
                    <img id="preview"
                         src="{{asset((isset($image) && $image->categoryimage!='')?'images/'.$image->categoryimage:'images/noimage.png')}}"
                         height="200px" width="200px"/>
                    <input class="form-control" style="display:none" name="image" type="file" id="image" name="_token" value="{{ csrf_token() }}">
                    <br/>
                    <a href="javascript:changeProfile();">Add Image</a> |
                    <a style="color: red" href="javascript:removeImage()">Remove</a>
                    <input type="hidden" style="display: none" value="0" name="remove" id="remove">
                </div>
            </div>

我的控制器，

public function index(Request $request)
    {
        $images = Category::orderBy('created_at', 'ASC')->paginate(8);
        return view('categories.index', compact('images'));
    }

 public function update(Request $request, $id)
    {

          if ($request->isMethod('get'))
            return view('categories.form', ['categoryimage' => Category::find($id)]);
        $image = Category::find($id);
            if ($request->hasFile('image')) {
                $dir = 'images/';
                if ($image->image != '' && File::exists($dir . $image->image))
                    File::delete($dir . $image->image);
                $extension = strtolower($request->file('image')->getClientOriginalExtension());
                $fileName = str_random() . '.' . $extension;
                $request->file('image')->move($dir, $fileName);
                $image->categoryimage = $fileName;
            } elseif ($request->remove == 1 && File::exists('images/' . $image->image)) {
                File::delete('images/' . $image->post_image);
                $image->categoryimage = null;
            }
            $image->categoryname = $request->description;
            $image->save();
            return redirect()->route('categories.index');
    }

和路线是

Route::match(['get', 'put'], 'category/update/{id}', 'CategoryController@update');

现在，我的问题是，当我单击“新建”按钮以添加新类别时，它运行良好。但是，当我单击“编辑”按钮时，它没有显示编辑表单，而是一直显示新的添加类别表单。就我而言，我认为这不需要

<h1>{{isset($image)?'Edit':'New'}}  Category</h1>

（$ image）变量以显示“编辑”表单。如何解决此问题？