Class: UIActionSheet

Inherits:
Object show all
Defined in:
lib/sugarcube/uiactionsheet.rb

Class Method Summary collapse

Class Method Details

.alert(title, options = {}, &block) ⇒ Object

UIActionSheet.alert("title", # The first button is considered the 'cancel' button, for the purposes of # whether the cancel or success handler gets called, the second button is # the 'destructive' button, and the rest are plain old buttons. buttons: %w"Cancel OK No-way", cancel: proc{ puts "nevermind" }, destructive: proc{ puts "OHHH YEAAH!" }, success: proc{ |pressed| puts "pressed: #pressed" }, )



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# File 'lib/sugarcube/uiactionsheet.rb', line 12

def self.alert(title, options={}, &block)
  # create the delegate
  delegate = SugarCube::ActionSheetDelegate.new
  delegate.on_success = options[:success] || block
  delegate.on_destructive = options[:destructive]
  delegate.on_cancel = options[:cancel]
  delegate.send(:retain)

  args = [title]            # initWithTitle:
  args << delegate          # delegate:

  buttons = []
  buttons.concat(options[:buttons]) if options[:buttons]

  if buttons.empty?
    # cancelButtonTitle: is first, so check for cancel handler
    if options[:cancel]
      buttons << 'Cancel'
    else
      buttons << nil
    end

    # destructiveButtonTitle, check for destructive handler
    if options[:destructive]
      buttons << 'Delete'
    else
      buttons << nil
    end
  elsif buttons.length == 1 and (options[:cancel] or options[:destructive])
    raise 'If you only have one button, use a :success handler, not :cancel or :destructive'
  end

  # uses localized buttons in the actual alert
  if buttons.length == 0
    buttons = [nil, nil]
  elsif buttons.length == 1
    buttons << nil
  end

  last_index = buttons.length - 1
  offset = 0

  button_index_map = {}
  if buttons[1]  # destructive
    button_index_map[0] = buttons[1]
    offset += 1
  else
    last_index -= 1
  end

  if buttons[0]  # cancel
    button_index_map[last_index] = buttons[0]
  end

  buttons[2..-1].each_with_index { |button, index|
    button_index_map[index + offset] = button
  }
  # the button titles, mapped to how UIActionSheet orders them.  These are passed to the success handler.
  delegate.button_index_map = button_index_map

  args.concat(buttons.map{ |s| s ? s.localized : nil })
  args << nil  # otherButtonTitles:..., nil

  alert = self.alloc
  alert.send('initWithTitle:delegate:cancelButtonTitle:destructiveButtonTitle:otherButtonTitles:', *args)
  window = UIApplication.sharedApplication.keyWindow || UIApplication.sharedApplication.windows[0]
  alert.showInView(window)
  alert
end