Added focus action

README.md

@@ -298,6 +298,7 @@ rmq(my_view).hide
 rmq(my_view).show
 rmq(my_view).toggle
 rmq(my_view).toggle_enabled
+rmq(my_text_field).focus # or .become_first_responder
 ```
 
 ### Subviews

motion/ruby_motion_query/actions.rb

@@ -20,6 +20,18 @@ module RubyMotionQuery
       self
     end
 
+    # Sets the last selected view as the first responder
+    #
+    # @example
+    #   rmq(my_view).next(UITextField).focus
+    def focus
+      unless RMQ.is_blank?(selected)
+        selected.last.becomeFirstResponder
+      end
+      self
+    end
+    alias :become_first_responder :focus
+
     def hide
       selected.each { |view| view.hidden = true }
       self

spec/actions.rb

@@ -2,7 +2,7 @@ describe 'actions' do
   before do
     @vc = UIViewController.alloc.init
     @viewq = @vc.rmq.append(UIView)
-    @sub_viewq = @vc.rmq(@viewq).append(UIView)
+    @sub_viewq = @viewq.append(UIView)
   end
 
   it 'should hide, show, and toggle a view' do
@@ -52,6 +52,41 @@ describe 'actions' do
     end
   end
 
+  describe 'focus' do
+    before do
+      window = UIWindow.alloc.initWithFrame(UIScreen.mainScreen.bounds)
+      @vc = UIViewController.alloc.initWithNibName(nil, bundle: nil)
+      window.rootViewController = @vc 
+      window.makeKeyAndVisible
+
+      @tf_0 = @vc.rmq.append(UITextField).style do |st|
+        st.frame = {l: 10, t: 10, w: 100, h: 30}
+      end.get
+      @tf_1 = @vc.rmq.append(UITextField).style do |st|
+        st.frame = {l: 10, t: 50, w: 100, h: 30}
+      end.get
+    end
+
+    it 'should set focus to a selected view' do
+      @tf_1.becomeFirstResponder.should == true
+      @tf_1.isFirstResponder.should == true
+      @tf_0.isFirstResponder.should == false 
+
+      @vc.rmq(@tf_0).focus.is_a?(RubyMotionQuery::RMQ).should == true
+      @tf_1.isFirstResponder.should == false
+      @tf_0.isFirstResponder.should == true
+    end
+
+    it 'should focus only the last selected view, if many views are selected' do
+      @tf_0.becomeFirstResponder.should == true
+      @tf_1.isFirstResponder.should == false
+      @tf_0.isFirstResponder.should == true
+      @vc.rmq(@tf_0, @tf_1).become_first_responder
+      @tf_1.isFirstResponder.should == true
+      @tf_0.isFirstResponder.should == false
+    end
+  end
+
   it 'should set attributes on a view' do
     1.should == 1
     # TODO