'"SproutCoreのHelloWorldに挑戦…をやり直す．"を進める'をもう一歩進める．

で次，

Step 1.
'clients/hello_world/controllers/app.js'を編集．

require('core');
HelloWorld.appController = SC.Object.create(
{
  // TODO: Add your own code here.
 greeting: "Hello World!", // ','を忘れずに．
 toggleGreeting: function() {
  var currentGreeting = this.get('greeting');
  var newGreeting = (currentGreeting === 'Hello World!') ? 'I am on SproutCore!' : 'Hello World!';
  this.set('greeting', newGreeting);
 }
}) ;

Step 2.
'clients/hello_world/english.lproj/body.rhtml'を編集．

<% content_for('body') do %>
<div class="sc-welcome">
 <img class="logo" src="<%= static_url('images/sproutcore-logo') %>" />
  <div class="message">
   <%= label_view :my_label, :tag => 'h1', :bind => { :value => 'HelloWorld.appController.greeting' } %>
   <%= button_view :toggle_button, :title => 'Change Title', :action => 'HelloWorld.appController.toggleGreeting' %>
  </div>
 </div>
<% end %>

reload.