Class: UIAlertView

Inherits:
Object show all
Defined in:
lib/ios/sugarcube-factories/uialertview.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

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

Examples:

UIAlertView.alert("title",
  message: "help!",
  # The first button is considered the 'cancel' button, for the purposes of
  # whether the cancel or success handler gets called
  buttons: %w"Cancel OK No-way",
  cancel: proc{ puts "nevermind" },
  success: proc{ |pressed| puts "pressed: #{pressed}" },
  )
# you can explicitly set the cancel button by using a Hash for the :buttons option
UIAlertView.alert("title",
  message: "help!",
  # The first button is considered the 'cancel' button, for the purposes of
  # whether the cancel or success handler gets called
  buttons: { cancel: 'Cancel', ok: 'OK', no_way: 'No-way' },
  cancel: proc{ puts "nevermind" },
  success: proc{ |pressed| puts "pressed: #{pressed.inspect}" },
  )  # pressed will be :ok or :no_way

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# File 'lib/ios/sugarcube-factories/uialertview.rb', line 21

def self.alert(title, options={}, more_options={}, &block)
  if title.is_a?(NSDictionary)
    options = title
    title = options[:title]
    message = options[:message]
  elsif options.is_a? String
    message = options
    options = more_options
  else
    message = options[:message]
  end

  # The delegate gets retained here because UIAlertView#delegate is a weak
  # reference.  It's released in the delegate method
  # `#didDismissWithButtonIndex(index)`
  delegate = SugarCube::AlertViewDelegate.new
  delegate.on_success = options[:success]
  delegate.on_cancel = options[:cancel]
  delegate.on_default = block
  delegate.send(:retain)

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

  buttons = (options[:buttons] || []).freeze
  if buttons.empty?
    buttons = []  # an empty Hash becomes an Array

    # cancelButtonTitle: is first, so check for cancel
    if options[:cancel]
      buttons << "Cancel"
    end

    # otherButtonTitles:
    if buttons.empty?
      args << nil  # cancel button => nil
      buttons << "OK"  # other buttons => "OK"
    elsif options[:success]
      buttons << "OK"
    end
  elsif buttons.length == 1 && options[:cancel]
    raise "If you only have one button, use a :success handler, not :cancel (and definitely not BOTH)"
  end

  # uses localized buttons in the actual alert
  if buttons.is_a?(NSDictionary)
    button_keys = buttons.keys
    if buttons.key?(:cancel)
      args << (buttons[:cancel] && NSBundle.mainBundle.localizedStringForKey(buttons[:cancel], value: nil, table: nil))
    else
      args << nil
    end
    args.concat(buttons.select { |k, m| k != :cancel }.map { |k, m| m && NSBundle.mainBundle.localizedStringForKey(m, value: nil, table: nil) })
  else
    button_keys = buttons
    args.concat(buttons.map { |m| m && NSBundle.mainBundle.localizedStringForKey(m, value: nil, table: nil) })
  end
  delegate.buttons = button_keys
  args << nil  # otherButtonTitles:..., nil

  alert = self.alloc
  alert.send("initWithTitle:message:delegate:cancelButtonTitle:otherButtonTitles:", *args)
  if options.key?(:style)
    style = options[:style]
    style = style.uialertstyle if style.respond_to?(:uialertstyle)
    alert.alertViewStyle = style
  end
  if options.fetch(:show, true)
    alert.show
  end
  alert
end

Instance Method Details

#<<(title) ⇒ Object


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# File 'lib/ios/sugarcube-factories/uialertview.rb', line 95

def <<(title)
  addButtonWithTitle(title)
end