RedAlert

Alerts and ActionSheets with ease

Did you know that UIAlertView and UIActionSheet (as well as their respective delegate protocols) are deprecated in iOS 8?

Apple requests you start using the new UIAlertController. This gem is built on UIAlertController and RMQ, along with seemless support for antiquated UIAlertViews & UIActionSheets for the gnostalgic.

With an emphasis on ease of use, this gem allows you to quickly implement Alerts and Actionsheets in your RMQ RubyMotion applications.

When run on iOS 8, RedAlert uses UIAlertController to present alerts and sheets.

When run on iOS 7, RedAlert uses UIAlertView present alerts and UIActionSheet to present sheets.

:dart: RedAlert Means you don't have to worry about a thing!

In Action

Installation

Requires RMQ 1.2.0 or later, and iOS 7 or later

Add the RedAlert gem to your Gemfile.

  gem 'RedAlert'

Usage

Note: If you're using RedPotion then rmq.app can be accessed by simply typing app, so rmq.app.alert would be simply app.alert. The following examples are verbose and assume only RMQ.

  # Simply do an alert
  rmq.app.alert("Minimal Alert")

  # Alert with callback
  rmq.app.alert("Alert with Block") {
    puts "Alert with Block worked!"
  }

  # Modify some snazzy options
  rmq.app.alert(title: "New Title", message: "Great message", animated: false)

  # Switch it to look like an ActionSheet by setting the style
  rmq.app.alert(title: "Hey there!", message: "My style is :sheet", style: :sheet) do |action_type|
    puts "You clicked #{action_type}"
  end

  # Add input fields by setting the style
  rmq.app.alert(title: "Text Field", message: "My style is :login", style: :login) do |action_type, fields|
    puts "you entered '#{fields[:login].text}' as the login and '#{fields[:password].text}' as the password"
  end

  # Pre-fill text into an input field
  rmq.app.alert(title: "Text Field", message: "My style is :input", style: :input, text: "Some Text", placeholder: "Some Placeholder") do |action_type, fields|
    puts "you entered '#{fields[:text].text}'"
  end

  # Add input fields with settings for placeholder text, whether the field is secure, and the keyboard type by setting the style to :custom
  rmq.app.alert(title: "Text Field", message: "My style is :custom", style: :custom, fields:
               {phone: {placeholder: 'Phone', keyboard_type: :phone_pad},
                email: {placeholder: 'Email', secure: false, keyboard_type: :email_address}}) do |action_type, fields|
    puts "you entered '#{fields[:phone].text}' and '#{fields[:email].text}'"
  end

  # Utilize common templates
  rmq.app.alert(message: "Would you like a sandwich?", actions: :yes_no_cancel, style: :sheet) do |action_type|
    case action_type
    when :yes
      puts "Here's your Sandwich!"
    when :no
      puts "FINE!"
    end
  end

You can pass in symbols or strings and we'll build the buttons for you:

rmq.app.alert title: "Hey!", actions: [ "Go ahead", :cancel, :delete ] do |button_tag|
  case button_tag
  when :cancel then puts "Canceled!"
  when :delete then puts "Deleted!"
  when "Go ahead" then puts "Going ahead!"
  end
end

You can even use the make_button helper to create custom buttons to add:

  # Use custom UIAction buttons and add them
  taco = rmq.app.make_button("Taco") {
            puts "Taco pressed"
          }
  nacho = rmq.app.make_button(title: "Nacho", style: :destructive)  {
            puts "Nacho pressed"
          }
  button_list = [taco, nacho]
  rmq.app.alert(title: "Actions!", message: "Actions created with `make_button` helper.", actions: button_list)

If you want to present your alert in :sheet style and you are on iPad, you have to provide the :source for the popover (either a UIView or a UIBarButtonItem)

rmq.append(UIButton, :my_button).on(:tap) do |sender|
  rmq.app.alert(title: "Actions!", message: "Alert from a Popover.", actions: [:ok, :cancel], style: :sheet, source: sender)
end

iOS 8+ options These options work only on iOS 8+

• :modal will prevent the popover to be close by tapping outside the popover
• :arrow_direction will force the direction of the popover arrow. Valid values are :up, :down, :left, :right or :any

Available Templates

Button templates are provided HERE

• :yes_no = Simple yes and no buttons.
• :yes_no_cancel = Yes/no buttons with a separated cancel button.
• :ok_cancel = OK button with a separated cancel button.
• :delete_cancel = Delete button (red) with a separated cancel button.

Field templates are provided HERE

• :input = One plaintext input field.
• :secure = One secure input field.
• :login = Two fields, one plaintext with placeholder text 'Login' and the other secure with placeholder text 'Password'.
• :change_password = Two fields, one secure with placeholder text 'Current Password' and the other secure with placeholder text 'New Password'.

:heartbeat: More to come: be sure to submit a pull-request with your button template needs.

iOS 7 Support

If you still need iOS 7, RedAlert has your back.

Instead of using iOS 8's UIAlertController, RedAlert will use UIActionSheet to display your sheets and UIAlertView to display your views.

With little-to-no changes to your code.

Because capabilities of iOS 7 & 8 alert-components are different, just a few edge cases that might sting you (but nothing critical):

• UIAlertView doesn't have the concept of :destructive buttons. These will fall back to :default.
• UIAlertView cares about the order of your :cancel actions, so [:ok, :cancel] is shown different than [:cancel, :ok].
• UIActionSheet also cares about the order. It's possible to put a :cancel first, which looks slightly awkward when shown. Try to put :cancel last.
• UIAlertView's alertViewStyles are not available through RedAlert as they aren't compatible with iOS 8. You'll have to call that directly.
• UIAlertView only supports up to 2 input fields.

Credits and Info

i18n support by Mark Rickert

iOS 7 support by Steve Kellock

Automatic button building by Jamon Holmgren

Ability to add textfields to alerts (Like Username/Password) by Derek Greenberg and notable work by Jon Silverman

iPad and popover support by Benjamin Michotte

Feel free to read up on UIAlertController to see what all is wrapped up in this gem.

• Hayageek
• NSHipster

Contributing

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Realize no one ever reads this section
6. Create new Pull Request