Added find_or_append

motion/ruby_motion_query/stylesheet.rb

@@ -145,7 +145,7 @@ module RubyMotionQuery
         view.rmq_style_applied
       rescue NoMethodError => e
         if e.message =~ /.*#{style_name.to_s}.*/
-          puts "\n[RMQ ERROR]  style_name :#{style_name} doesn't exist for a #{view.class.name}. Add 'def #{style_name}(st)' to #{stylesheet.class.name} class\n\n"
+          $stderr.puts "\n[RMQ ERROR]  style_name :#{style_name} doesn't exist for a #{view.class.name}. Add 'def #{style_name}(st)' to #{stylesheet.class.name} class\n\n"
         else
           raise e
         end

motion/ruby_motion_query/subviews.rb

@@ -111,6 +111,34 @@ module RubyMotionQuery
       append(view_or_constant, style, opts).get
     end
 
+    # Same as append, but will look for a view with the same name and reapply styles
+    # to it if it finds one. If it doesn't, it'll append as normal.
+    #
+    # @example
+    #   @my_button = rmq.find_or_append(UIButton, :my_button)
+    #   @my_button = rmq.find_or_append(UIButton, :my_button) # Only one created
+    def find_or_append(view_or_constant, style=nil, opts = {}, &block)
+      if style && (q = self.find(style)) && q.length > 0
+        q.reapply_styles
+        block.call q if block
+        q
+      else
+        append(view_or_constant, style, opts, &block)
+      end
+    end
+
+    # Same as append!, but will look for a view with the same name and reapply styles
+    # to it if it finds one. If it doesn't, it'll append! as normal.
+    #
+    # @example
+    #   @my_button = rmq.find_or_append!(UIButton, :my_button)
+    #   @my_button = rmq.find_or_append!(UIButton, :my_button) # Only one created
+    def find_or_append!(view_or_constant, style=nil, opts = {}, &block)
+      find_or_append(view_or_constant, style, opts).get.tap do |q|
+        block.call q
+      end
+    end
+
     # Just like append, but inserts the view at index 0 of the subview array
     #
     # @return [RMQ]

spec/subviews.rb

@@ -334,6 +334,44 @@ describe 'subviews' do
       block_called.should == true
     end
   end
+
+  describe 'find_or_append' do
+    it 'appends if none existing' do
+      @vc.view.subviews.length.should == 0
+      view = @vc.rmq.find_or_append(UIView).get
+      @vc.view.subviews.length.should == 1
+      @vc.view.subviews.first.should == view
+    end
+
+    it 'finds if existing' do
+      @vc.rmq.stylesheet = StyleSheetForSubviewsTests
+      @vc.view.subviews.length.should == 0
+      existing_view = @vc.rmq.append(UIView, :my_style).get
+      @vc.view.subviews.length.should == 1
+      found_view = @vc.rmq.find_or_append(UIView, :my_style).get
+      @vc.view.subviews.length.should == 1
+      found_view.should == existing_view
+    end
+  end
+
+  describe 'find_or_append!' do
+    it 'appends if none existing' do
+      @vc.view.subviews.length.should == 0
+      view = @vc.rmq.find_or_append!(UIView)
+      @vc.view.subviews.length.should == 1
+      @vc.view.subviews.first.should == view
+    end
+
+    it 'finds if existing' do
+      @vc.rmq.stylesheet = StyleSheetForSubviewsTests
+      @vc.view.subviews.length.should == 0
+      existing_view = @vc.rmq.append!(UIView, :my_style)
+      @vc.view.subviews.length.should == 1
+      found_view = @vc.rmq.find_or_append!(UIView, :my_style)
+      @vc.view.subviews.length.should == 1
+      found_view.should == existing_view
+    end
+  end
 end
 
 class StyleSheetForSubviewsTests < RubyMotionQuery::Stylesheet

spec/traversing.rb

@@ -1,4 +1,4 @@
-describe 'transversing' do
+describe 'traversing' do
   before do
     @vc = UIViewController.alloc.init
     @root_view = @vc.view