/usr/local/lib/ruby/gems/2.2.0/gems/gosu-0.10.4/lib/gosu/patches.rb:37:in`initialize'：無法打開文件./media/image.jpg（ RuntimeError）在gosu

Question

我有這個代碼是不給所需的輸出並顯示上述錯誤。

require 'gosu' 

def media_path(file) 
    File.join(File.dirname(File.dirname(
    __FILE__)),'media', file) 
end 


#def media_path(file); File.expand_path "media/#{file}", File.dirname(__FILE__) 
# end 


class Explosion 
    FRAME_DELAY = 10 # ms 
    SPRITE = media_path('space.png') 

    def self.load_animation(window) 
    Gosu::Image.load_tiles(
     window, SPRITE, 128, 128, false) 
    end 

    def initialize(animation, x, y) 
    @animation = animation 
    @x, @y = x, y 
    @current_frame = 0 
    end 

    def update 
    @current_frame += 1 if frame_expired? 
    end 

    def draw 
    return if done? 
    image = current_frame 
    image.draw(
     @x - image.width/2.0, 
     @y - image.height/2.0, 
     0) 
    end 
def done? 
    @done ||= @current_frame == @animation.size 
    end 

    private 

    def current_frame 
    @animation[@current_frame % @animation.size] 
    end 

    def frame_expired? 
    now = Gosu.milliseconds 
    @last_frame ||= now 
    if (now - @last_frame) > FRAME_DELAY 
     @last_frame = now 
    end 
    end 
end 

class GameWindow < Gosu::Window 
    BACKGROUND = media_path('image.jpg') 

    def initialize(width=800, height=600, fullscreen=false) 
    super 
    self.caption = 'Hello Animation' 
    @background = Gosu::Image.new(
     self, BACKGROUND, false) 
    @animation = Explosion.load_animation(self) 
    @explosions = [] 
    end 

    def update 
@explosions.reject!(&:done?) 
    @explosions.map(&:update) 
    end 

    def button_down(id) 
    close if id == Gosu::KbEscape 
    if id == Gosu::MsLeft 
     @explosions.push(
     Explosion.new(
      @animation, mouse_x, mouse_y)) 
    end 
    end 

    def needs_cursor? 
    true 
    end 

    def needs_redraw? 
    !@scene_ready || @explosions.any? 
    end 

    def draw 
    @scene_ready ||= true 
    @background.draw(0, 0, 0) 
    @explosions.map(&:draw) 
    end 
end 

window = GameWindow.new 
window.show 

Answer 1

它無法找到./media/image.jpg你確定它是存在的，並且可以打開，是當前目錄「」你認爲它是什麼？