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iosruby-on-railsrubyrubymotion

RubyMotion error

I just started learning ruby motion and at the beginning of a tutorial I have hit a road block! The tutorial is "RubyMotion iOS Development Essentials".

Here is my code:

class RootController < UIViewController
    def viewDidLoad
    alert = UIAlertView.alloc.initWithTitle "This is foo title",
    message:"Do you like this example?",
    delegate: nil,
    cancelButtonTitles: "cancel",
    otherButtonTitles: "Yes", "No", nil
    alert.show
    end
end

I know the indentation looks funny, but apparently that is RubyMotion syntax... Weird, I know. And here is the error I am receiving, regarding the "initWithTitle" method:

(main)> 2013-12-13 00:44:40.780 HelloWorld[97435:80b] root_controller.rb:7:in `viewDidLoad': undefined method `initWithTitle' for #<UIAlertView:0x8d2bcf0> (NoMethodError)
    from app_delegate.rb:6:in `application:didFinishLaunchingWithOptions:'
2013-12-13 00:44:40.782 HelloWorld[97435:80b] root_controller.rb:7:in `viewDidLoad': undefined method `initWithTitle' for #<UIAlertView:0x8d2bcf0> (NoMethodError)
    from app_delegate.rb:6:in `application:didFinishLaunchingWithOptions:'
2013-12-13 00:44:40.784 HelloWorld[97435:80b] *** Terminating app due to uncaught exception 'NoMethodError', reason: 'root_controller.rb:7:in `viewDidLoad': undefined method `initWithTitle' for #<UIAlertView:0x8d2bcf0> (NoMethodError)
    from app_delegate.rb:6:in `application:didFinishLaunchingWithOptions:'

'

I would appreciate any pointers, it's a major bummer to get stuck this early on!

Solution

  • cancelButtonTitles should be singular: cancelButtonTitle.

    Because you're using plural wording, it can't find a matching method signature.