RubyMotion未定義的方法`addTarget」爲＃<UIRoundedRectButton：0x761fd40>

Question

我下面的motioncasts抓屏即可在： http://motioncasts.tv/start-building-views-in-rubymotion/

並有一些代碼：

button = UIButton.buttonWithType(UIButtonTypeRoundedRect) 
button.frame = [[15, 300], [280,50]] 
button.setTitle("Move to next view", forState: UIControlStateNormal) 
button.addTarget(self, 
       action: "moveToChildView:", 
       formControlEvents: UIControlEventTouchUpInside) 

這是爲了工作，但當試圖編譯產生的錯誤：

(main)> 2013-04-18 18:41:06.205 12wbt[76267:c07] home_controller.rb:19:in `viewDidLoad': undefined method `addTarget' for #<UIRoundedRectButton:0x761fd40> (NoMethodError) 
    from app_delegate.rb:6:in `application:didFinishLaunchingWithOptions:' 
2013-04-18 18:41:06.208 12wbt[76267:c07] *** Terminating app due to uncaught exception 'NoMethodError', reason: 'home_controller.rb:19:in `viewDidLoad': undefined method `addTarget' for #<UIRoundedRectButton:0x761fd40> (NoMethodError) 
    from app_delegate.rb:6:in `application:didFinishLaunchingWithOptions:' 
' 

據我可以告訴，這是來自screencast應該w的確切代碼ork沒有錯誤。哪裏不對？

Answer 1

問題已解決。最後一行應爲forControlEvents，而不是formControlEvents。