Ruby Chingu:：GameWindow上的Chingu输入属性导致异常

这段代码在Chingu中引发了一个非常奇怪的异常，Chingu是一个依赖于Gosu 2D游戏框架的ruby游戏库：

class StopSignAttack < Chingu::Window

  def initialize
    super(1000, 1000, false)
    self.input = { :escape => :close }
    self.caption = "Stop Sign ATTACK!!!"
    push_game_state(Start.new)
  end

end

当按下ESC键时，我会出现以下异常：

stop_sign_attack.rb:23:in `close': undefined method `close' for nil:NilClass (NoMethodError)
    from /Users/sams/.rvm/gems/ruby-1.9.3-p0/gems/gosu-0.7.41-universal-darwin/lib/gosu/swig_patches.rb:19:in `rescue in block (2 levels) in <class:Window>'
    from /Users/sams/.rvm/gems/ruby-1.9.3-p0/gems/gosu-0.7.41-universal-darwin/lib/gosu/swig_patches.rb:12:in `block (2 levels) in <class:Window>'
    from /Users/sams/.rvm/gems/ruby-1.9.3-p0/gems/gosu-0.7.41-universal-darwin/lib/gosu/swig_patches.rb:26:in `show'
    from /Users/sams/.rvm/gems/ruby-1.9.3-p0/gems/gosu-0.7.41-universal-darwin/lib/gosu/swig_patches.rb:26:in `show'
    from stop_sign_attack.rb:28:in `<main>'

stop\u sign\u attack.rb:23:in'close'：nil:NilClass（NoMethodError）的未定义方法'close'
from/Users/sams/.rvm/gems/ruby-1.9.3-p0/gems/gosu-0.7.41-universal-darwin/lib/gosu/swig_patches.rb:19:in `分块救援（2级）'
from/Users/sams/.rvm/gems/ruby-1.9.3-p0/gems/gosu-0.7.41-universal-darwin/lib/gosu/swig_patches.rb:12:in `块（2层）in'
from/Users/sams/.rvm/gems/ruby-1.9.3-p0/gems/gosu-0.7.41-universal-darwin/lib/gosu/swig_patches.rb:26:in“show”
from/Users/sams/.rvm/gems/ruby-1.9.3-p0/gems/gosu-0.7.41-universal-darwin/lib/gosu/swig_patches.rb:26:in“show”
从停止符号开始攻击。rb:28:in`'

---

任何想法都将不胜感激。

您遗漏了一些信息，这些信息将允许有人对此进行调试。例如，您正在推一个名为Start的游戏状态，但在您的示例中没有声明Start类。但是你还没有分享那部分代码。我创建了以下示例项目，以测试您所获得的：

require 'chingu'

# A simple GameState-example
class Start < Chingu::GameState
end

class StopSignAttack < Chingu::Window

  def initialize
    super(1000, 1000, false)
    self.input = { :escape => :close }
    self.caption = "Stop Sign ATTACK!!!"
    push_game_state(Start.new)
  end

end

StopSignAttack.new.show

需要“chingu”
#一个简单的游戏状态示例
类开始：close}
self.caption=“停止标志攻击！！！”
推送游戏状态（开始。新建）
结束
结束
StopSignAttack.new.show

---

这一切都很好，当我按下escape时，毫无例外地退出。

你说得很好，但我承认我的故障排除还没有深入到那个程度。我在征求意见。

stop_sign_attack.rb:23:in `close': undefined method `close' for nil:NilClass (NoMethodError)
    from /Users/sams/.rvm/gems/ruby-1.9.3-p0/gems/gosu-0.7.41-universal-darwin/lib/gosu/swig_patches.rb:19:in `rescue in block (2 levels) in <class:Window>'
    from /Users/sams/.rvm/gems/ruby-1.9.3-p0/gems/gosu-0.7.41-universal-darwin/lib/gosu/swig_patches.rb:12:in `block (2 levels) in <class:Window>'
    from /Users/sams/.rvm/gems/ruby-1.9.3-p0/gems/gosu-0.7.41-universal-darwin/lib/gosu/swig_patches.rb:26:in `show'
    from /Users/sams/.rvm/gems/ruby-1.9.3-p0/gems/gosu-0.7.41-universal-darwin/lib/gosu/swig_patches.rb:26:in `show'
    from stop_sign_attack.rb:28:in `<main>'

require 'chingu'

# A simple GameState-example
class Start < Chingu::GameState
end

class StopSignAttack < Chingu::Window

  def initialize
    super(1000, 1000, false)
    self.input = { :escape => :close }
    self.caption = "Stop Sign ATTACK!!!"
    push_game_state(Start.new)
  end

end

StopSignAttack.new.show