使用 require gosu MAC OS 时的错误

Question

我正在尝试运行此脚本并且我正在使用 Coderunner 2

require 'rubygems'
require 'gosu'
 class Ball 
   def initialize(the_window)
   @x = 200
   @y = 200
   @w = 20
   @h = 20
   @image = Gosu::Image.new(the_window, "ball.png", false)
end

def draw
    @image.draw(@x, @y , 1)
end
end
class GameWindow < Gosu::Window
    def initialize
    super 800,600, false
    self.caption = "Paddle Game"
    @ball = Ball.new(self)
    end
    def update

    end
    def draw
    @ball.draw
    end
end
window = GameWindow.new
window.show

**

它会返回一条错误消息：

/Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:54:in `require':
    cannot load such file -- gosu (LoadError)
    from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:54:in 
   `require'
    from paddle_game.rb:2:in `<main>'

我已经安装了 Ruby 2.0.0 和 gems...当我尝试安装 gosu 这是我得到的错误：

Mac-Users-iMac-763:~ macuser$ sudo gem install gosu
Building native extensions.  This could take a while...
ERROR:  Error installing gosu:
ERROR: Failed to build gem native extension.

current directory: /Library/Ruby/Gems/2.0.0/gems/gosu-0.10.4/ext/gosu
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby -r                     .    /siteconf20151124-93492-9a029w.rb extconf.rb
 The Gosu gem requires some libraries to be installed system-wide.
 See the following site for a list:
 https://github.com/jlnr/gosu/wiki/Getting-Started-on-OS-X

creating Makefile

current directory: /Library/Ruby/Gems/2.0.0/gems/gosu-0.10.4/ext/gosu
make "DESTDIR=" clean

current directory: /Library/Ruby/Gems/2.0.0/gems/gosu-0.10.4/ext/gosu
make "DESTDIR="
compiling stb_vorbis.c
compiling gosu_wrap.cxx
compiling Audio-Audio.cpp
compiling Bitmap-Bitmap.cpp
compiling Bitmap-BitmapIO.cpp
compiling DirectoriesUnix.cpp
compiling FileUnix.cpp
compiling Graphics-BlockAllocator.cpp
compiling Graphics-Color.cpp
compiling Graphics-Graphics.cpp
compiling Graphics-Image.cpp
compiling Graphics-LargeImageData.cpp
compiling Graphics-Macro.cpp
compiling Graphics-Resolution.cpp
compiling Graphics-ResolutionApple.cpp
compiling Graphics-TexChunk.cpp
compiling Graphics-Texture.cpp
compiling Graphics-Transform.cpp
compiling Input-Input.cpp
compiling Input-TextInput.cpp
compiling Inspection.cpp
compiling IO.cpp
compiling Math.cpp
compiling Text-Font.cpp
compiling Text-Text.cpp
compiling Text-TextApple.cpp
compiling TimingApple.cpp
compiling Utility.cpp
compiling UtilityApple.cpp
compiling Window.cpp
linking shared-object gosu.bundle
clang: error: unknown argument: '-multiply_definedsuppress'
make: *** [gosu.bundle] Error 1

make failed, exit code 2

Gem files will remain installed in /Library/Ruby/Gems/2.0.0/gems/gosu-0.10.4 
   for inspection.
Results logged to /Library/Ruby/Gems/2.0.0/extensions/universal-darwin- 
  13/2.0.0/gosu-0.10.4/gem_make.out

我已尝试研究并提出不同的建议，但目前无法进一步了解。只是想知道我可能做错了什么，或者我是否应该使用其他编辑器？不知道为什么“要求”对我不起作用。谢谢

Answer 1

我注意到的几件事：

1. 您的class Ball 缩进了一个空格。
2. 你需要end你的class Ball方法。
3. 在def draw 函数之后，您有一个额外的end。
4. 您的方法需要缩进。
5. 您的缩进不一致（选择 2 或 4 个空格并遵守约定）
6. 看到这个帖子回复：require 'rubygems'

这个版本的代码在我的系统上启动一个窗口（Ubuntu 14 和 Ruby 2.3 并使用我下载的 rvm 1.11.3.9 和 bundledgosu 0.10.8）：

# require 'rubygems'
require 'gosu'

# class Ball 
#   def initialize(the_window)
#     @x = 200
#     @y = 200
#     @w = 20
#     @h = 20
#     @image = Gosu::Image.new(the_window, "ball.png", false)
#   end
# end
# 
# def draw
#   @image.draw(@x, @y , 1)
# end

# end

class GameWindow < Gosu::Window
  def initialize
    super 800, 600, false          # <-- width, height, fullscreen=false
    self.caption = "Paddle Game"
#     @ball = Ball.new(self)
  end

  def update
  end

  def draw
#     @ball.draw
  end
end

window = GameWindow.new
window.show

如果你在 OSX 上使用 Ruby Gosu，你可能想去这里：

https://github.com/gosu/gosu/wiki/Getting-Started-on-OS-X

不管怎样，我在安装后得到了相同的“LoadError”，并在项目目录中使用“bundler”处理了 gem 依赖项。我访问了GOSU网站的Linux版本：

https://github.com/gosu/gosu/wiki/Getting-Started-on-Linux

在命令行中输入后：

user@ubuntu:~/Ruby/gosu_project$ sudo apt-get install build-essential libsdl2-dev libsdl2-ttf-dev libpango1.0-dev libgl1-mesa-dev libfreeimage-dev libopenal-dev libsndfile-dev

user@ubuntu:~/Ruby/gosu_project$ gem install gosu

我还必须调用：

user@ubuntu:~/Ruby/gosu_project$捆绑

http://bundler.io/ - 也适用于 MacOSX...

每个人：https://github.com/gosu/gosu/wiki/ruby-tutorial

这个gosu文件：

# basic Gosu: gui test file

require 'gosu'

class TestWindow < Gosu::Window   # <-- inherits from Gosu Window Super class

  def initialize
    super 640, 480, false         # <-- width, height, fullscreen = false
    self.caption = "successful gosu test window"
  end

  def update
  end

  def draw
  end

end


TestWindow.new.show

...加载一个 640x480 的窗口

user@ubuntu:~/Ruby/gosu_project$ ruby gosu_test.rb