在单双行显示不同的颜色Rails的一些view helper

cycle总是忘了，搬回来标记一下

  # Alternate CSS classes for even and odd numbers...
  @items = [1,2,3,4]
  <table>
  <% @items.each do |item| %>
    <tr class="<%= cycle("even", "odd") -%>">
      <td>item</td>
    </tr>
  <% end %>
  </table>

  # Cycle CSS classes for rows, and text colors for values within each row
  @items = x = [{:first => 'Robert', :middle => 'Daniel', :last => 'James'},
               {:first => 'Emily', :middle => 'Shannon', :maiden => 'Pike', :last => 'Hicks'},
              {:first => 'June', :middle => 'Dae', :last => 'Jones'}]
  <% @items.each do |item| %>
    <tr class="<%= cycle("odd", "even", :name => "row_class") -%>">
      <td>
        <% item.values.each do |value| %>
          <%# Create a named cycle "colors" %>
          <span style="color:<%= cycle("red", "green", "blue", :name => "colors") -%>">
            <%= value %>
          </span>
        <% end %>
        <% reset_cycle("colors") %>
      </td>
   </tr>
 <% end %>

还有两个helper

也可以一起

  truncate("Once upon a time in a world far far away")
  # => "Once upon a time in a world..."

  truncate("Once upon a time in a world far far away", :length => 17)
  # => "Once upon a ti..."

  truncate("Once upon a time in a world far far away", :length => 17, :separator => ' ')
  # => "Once upon a..."

  truncate("And they found that many people were sleeping better.", :length => 25, :omission => '... (continued)')
  # => "And they f... (continued)"

  truncate("<p>Once upon a time in a world far far away</p>")
  # => "<p>Once upon a time in a wo..."

  pluralize(1, 'person')
  # => 1 person

  pluralize(2, 'person')
  # => 2 people

  pluralize(3, 'person', 'users')
  # => 3 users

  pluralize(0, 'person')
  # => 0 people

评论

1 楼 kewin 2010-12-08  

改正为：
  <%@items = [1,2,3,4]%>
  <table  class="<%= cycle("odd", "even", :name => "row_class") -%>">
  <% @items.each do |item| %>
    <tr style="color:<%= cycle("red", "green",  :name => "colors") -%>">
      <td>item</td>
    </tr>
  <% end %>
<% reset_cycle("colors") %>
  </table>

 
  <%@items = x = [{:first => 'Robert', :middle => 'Daniel', :last => 'James'},
               {:first => 'Emily', :middle => 'Shannon', :maiden => 'Pike', :last => 'Hicks'},
              {:first => 'June', :middle => 'Dae', :last => 'Jones'}]%>
  <% @items.each do |item| %>
    <tr class="<%= cycle("odd", "even", :name => "row_class") -%>">
      <td>
        <% item.values.each do |value| %>
          <%# Create a named cycle "colors" %>
          <span style="color:<%= cycle("red", "green", "blue", :name => "colors") -%>">
            <%= value %>
          </span>
        <% end %>
        <% reset_cycle("colors") %>
      </td>
   </tr>
<% end %>