How to load a controller when clicking a button with RubyMotion?

Question

Let's say I have 2 controllers A and B.

In A I have:

def viewDidLoad
  super
  button = UIButton.buttonWithType UIButtonTypeRoundedRect
  button.setTitle "Open B", forState: UIControlStateNormal
  button.addTarget(self, action: :open_b, forControlEvents: UIControlEventTouchUpInside)
  self.view.addSubview button
end

def open_b
  # ?????
end

In B I have another view with its own logic, which is not important.

I want to open B when clicking the button. How should I go and do this?

This must be dead obvious for anyone with some iOS experience, but I can't find how you're supposed to do it. Any pointers are appreciated. A solution in Objectve-C is acceptable and would get my upvote, even if I'd prefer it to be with RubyMotion.

Answer 1

Here is how to do it using a modal view controller:

app_delegate.rb:

class AppDelegate
  def application(application, didFinishLaunchingWithOptions:launchOptions)
    @window = UIWindow.alloc.initWithFrame(UIScreen.mainScreen.bounds)
    @window.rootViewController = MyViewA.alloc.init
    @window.makeKeyAndVisible
    true
  end
end

viewa.rb:

class MyViewA < UIViewController

  def viewDidLoad
    super
    button = UIButton.buttonWithType UIButtonTypeRoundedRect
    button.setTitle "Open B", forState: UIControlStateNormal
    button.frame = [[10, 50], [300, 50]]
    button.addTarget(self, action: "open_b", forControlEvents: UIControlEventTouchUpInside)
    self.view.addSubview button
  end

  def open_b
    view_b = MyViewB.alloc.init
    view_b.delegate = self
    self.presentViewController view_b, animated:true, completion:nil
  end

  def done_with_b
    self.dismissViewControllerAnimated true, completion:nil
  end

end

viewb.rb:

class MyViewB < UIViewController

  attr_accessor :delegate

  def viewDidLoad
    super
    button = UIButton.buttonWithType UIButtonTypeRoundedRect
    button.setTitle "Return to A", forState: UIControlStateNormal
    button.frame = [[10, 50], [300, 50]]
    button.addTarget(self, action: "press_button", forControlEvents: UIControlEventTouchUpInside)
    self.view.addSubview button
  end

  def press_button
    delegate.done_with_b
  end

end