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我的应用程序支持图像上传。如果成功，用户会收到一条成功消息：

控制器：

def create
    @rating = Rating.new(params[:rating])


    respond_to do |format|
      if @rating.save
        format.html { redirect_to @rating, :notice => 'Got It!',
                                  :flash => {:notice_small => 'Your photo has been uploaded. good luck with its coolness rating!'} }
        format.json { render :json => @rating, :status => :created, :location => @rating }
      else
        format.html { render :action => "new" }
        format.json { render :json => @rating.errors, :status => :unprocessable_entity }
      end
    end
  end

风景：

<br>
<br>
<div style="height: 100px;" class="visible-tablet visible-phone"></div>
<p id="notice" class="big_notice"><%= notice %></p>
<% if defined? flash[:notice_small]  %>
    <p id="small_notice" class="small_notice"><%= flash[:notice_small] %></p>
<% end %>

在桌面上运行良好。但不是在手机上:-(图片已上传，但我没有收到确认消息

编辑：我在移动设备上查看了源代码并像这样显示 html

<p id="notice" class="big_notice"></p>
<p id="small_notice" class="small_notice"></p>

表示flash[:notice_small]已定义（注意if defined? flash[:notice_small]条件）但它只是空的

4

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