Formotion with dynamic table

calculator_form_controller.rb

class CalculatorFormController < Formotion::FormController
  attr_accessor :calc

  def done
    puts "row done #{@form.render}"
    @calc.got_answers @form.render

    new_form = Formotion::Form.new(@calc.get_questions)
    @form = new_form
    @form.controller = self
    @form.reload_data
  end
end

formotion_custom_rows.rb

class Kernel
  # get rid of form warnings on pickers
  def warn(message)
  end
end

module Formotion
  module RowType
    class StringRow
      def input_toolbar
        @input_toolbar ||= begin
                             toolbar = UIToolbar.alloc.initWithFrame(CGRectMake(0,0,320,44))
                             toolbar.translucent = true
                             flex_button = UIBarButtonItem.alloc.initWithBarButtonSystemItem(UIBarButtonSystemItemFlexibleSpace, target: self, action: nil)
                             done_button = UIBarButtonItem.alloc.initWithBarButtonSystemItem(UIBarButtonSystemItemDone, target: self, action: 'row_done')
                             toolbar.items = [flex_button, done_button]
                             toolbar
                           end
      end

      def row_done
        self.row && self.row.text_field.resignFirstResponder
        self.tableView.delegate.controller.done
      end
    end

    class PickerRow
      def after_build(cell)
        self.row.text_field.inputView = self.picker
        self.row.text_field.inputAccessoryView = self.input_toolbar
      end
    end

    class OptionsRow
      def build_cell(cell)
        cell.selectionStyle = UITableViewCellSelectionStyleNone
        segmentedControl = UISegmentedControl.alloc.initWithItems(row.items || [])
        segmentedControl.selectedSegmentIndex = row.items.index(row.value) if row.value
        segmentedControl.segmentedControlStyle = UISegmentedControlStyleBar
        cell.accessoryView = cell.editingAccessoryView = segmentedControl

        segmentedControl.when(UIControlEventValueChanged) do
          break_with_semaphore do
            row.value = row.items[segmentedControl.selectedSegmentIndex]

            # reload questions
            self.row.form.controller.done
          end
        end
        observe(self.row, "value") do |old_value, new_value|
          break_with_semaphore do
            if row.value
              segmentedControl.selectedSegmentIndex = row.items.index(row.value)
            else
              segmentedControl.selectedSegmentIndex = UISegmentedControlNoSegment
            end
          end
        end

        nil
      end

    end

    class DateTimeRow < DateRow
      def formatter
        super
        @formatter.timeStyle = NSDateFormatterShortStyle
        @formatter
      end

      def after_build(cell)
        self.row.text_field.inputView = self.picker
        self.row.text_field.inputAccessoryView = self.input_toolbar
        update
      end

      def picker
        super
        @picker.datePickerMode = UIDatePickerModeDateAndTime
        @picker
      end
    end

    class CountdownRow < DateRow
      def formatted_value
        return formatter.stringFromDate(self.picker.date) if self.row.value && self.row.value > 60
        ""
      end

      def formatter
        super
        @formatter.dateFormat = "HH:mm"
        @formatter
      end

      def after_build(cell)
        self.row.text_field.inputView = self.picker
        self.row.text_field.inputAccessoryView = self.input_toolbar
        update
      end

      def picker
        @picker ||= begin
                      picker = UIDatePicker.alloc.initWithFrame(CGRectZero)
                      picker.datePickerMode = UIDatePickerModeCountDownTimer
                      picker.hidden = false
                      #picker.date = self.date_value || NSDate.date
                      picker.countDownDuration = self.row.value || 0

                      picker.when(UIControlEventValueChanged) do
                        components = NSCalendar.currentCalendar.components((NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit), fromDate: @picker.date)
                        inputInterval = (components.hour*60*60 + components.minute*60)
                        self.row.value = inputInterval
                        update
                      end

                      picker
                      end
      end
    end
  end
end

view_controller_snippet.rb

# same as the formotion example except with the calculator form controller

    @form = Formotion::Form.new(@calc.get_questions)
    @view_controller = CalculatorFormController.alloc.initWithForm(@form)
    @view_controller.calc = @calc

    @view_controller.navigationItem.rightBarButtonItem = UIBarButtonItem.alloc.initWithBarButtonSystemItem(UIBarButtonSystemItemSave, target:self, action:'submit')
    @navigation_controller = UINavigationController.alloc.initWithRootViewController(@view_controller)

    presentViewController(@navigation_controller, animated: true, completion: nil)