calabash-ios UIPickerView scroll to specific value

Question

I have a UIPickerView on an iOS app. Trying to use calabash-ios to scroll down on the UIPickerView to a specific value. It is a list of years.

I tried this to see if it will scroll at least:

    Then I scroll down on "myPickerAccessibilityLabel"

Didn't work

Is there a custom step for UIPickerView's?

Answer 1

Lasse's answer is correct (I up-voted). But just to be clear, it will only work on UIDatePickers. I was just looking at the Calabash iOS sources and it looks like we have marked some of the picker methods private. The following was grabbed from the briar gem. It uses private UIKit selectors to manipulate the picker wheels. The caveat is that it might not work on non-circular (infinite) pickers.

You can use the code below to write a Step that scrolls a picker column to row with text.

def picker_current_index_for_column (column)
  arr = query('pickerTableView', :selectionBarRow)
  arr[column]
end
# methods common to generic and date pickers
def picker_current_index_for_column_is(column, val)
  picker_current_index_for_column(column) == val
end

def previous_index_for_column (column)
  picker_current_index_for_column(column) - 1
end

def picker_next_index_for_column (column)
  picker_current_index_for_column(column) + 1
end

def picker_scroll_down_on_column(column)
  new_row = previous_index_for_column column
  query("pickerTableView index:'#{column}'", [{:selectRow => new_row},
                                              {:animated => 1},
                                              {:notify => 1}])
end

def picker_scroll_up_on_column(column)
  new_row = picker_next_index_for_column column
  query("pickerTableView index:'#{column}'", [{:selectRow => new_row},
                                              {:animated => 1},
                                              {:notify => 1}])
end
def visible_titles (column)
  query("pickerTableView index:#{column} child pickerTableViewWrapperCell", :wrappedView, :text).reverse
end

# May only work on circular pickers - does _not_ work on non-circular
# pickers because the visible titles do _not_ follow the selected index
def selected_title_for_column (column)
  selected_idx = picker_current_index_for_column column
  titles = visible_titles column
  titles[selected_idx]
end

def scroll_picker(dir, column)
  if dir.eql? 'down'
    picker_scroll_down_on_column column
  else
    picker_scroll_up_on_column column
  end
  sleep 0.4
end