Cocos2d: AttributeError: 'Director' 对象没有属性 '_window_virtual_width'

Question

我们正在使用 cocos2d 框架来创建游戏。我们对这个框架完全陌生，所以我们无法让 director 对象按预期工作。这是我们的代码框架：

from cocos.director import director
from cocos.layer import base_layers


import sys
import math
import os

import pyglet
import cocos


world_width = 1000
world_height = 1000
class NetworkMap(cocos.layer.ScrollableLayer):
    def __init__(self, world_width, world_height):
        self.world_width = world_width
        self.world_height = world_height
        super(NetworkMap, self).__init__()
        bg = ColorLayer(170,170,0,255,width=500,height=500)
        self.px_width = world_width
        self.px_height = world_height
        self.add(bg,z=0)

class TestScene(cocos.scene.Scene):
    def __init__(self):
        super(TestScene,self).__init__()

    def on_enter():
        director.push_handlers(self.on_cocos_resize)
        super(TestScene, self).on_enter()

    def on_cocos_resize(self, usable_width, usable_height):
        self.f_refresh_marks()

def main():
    scene = TestScene()
    director.init(world_width, world_height, do_not_scale=True)
    world_map = NetworkMap(world_width, world_height)
    scroller = cocos.layer.ScrollingManager()
    scroller.add(world_map)
    scene.add(scroller)
    director.run(scene)

所以由于某种原因，导演没有我们想要的所有属性。 我们的堆栈跟踪是：

Traceback (most recent call last):
File "map.py", line 49, in <module>
main()
File "map.py", line 39, in main
scene = TestScene()
File "map.py", line 29, in __init__
super(TestScene,self).__init__()
File "/usr/local/lib/python2.7/dist-packages/cocos2d-0.5.5-py2.7.egg/cocos/scene.py",     line 95, in __init__
super(Scene,self).__init__()
File "/usr/local/lib/python2.7/dist-packages/cocos2d-0.5.5-py2.7.egg/cocos/cocosnode.py", line 114, in __init__
self.camera = Camera()
File "/usr/local/lib/python2.7/dist-packages/cocos2d-0.5.5-py2.7.egg/cocos/camera.py", line 56, in __init__
 self.restore()
 File "/usr/local/lib/python2.7/dist-packages/cocos2d-0.5.5-py2.7.egg/cocos/camera.py", line 76, in restore
 width, height = director.get_window_size()
 File "/usr/local/lib/python2.7/dist-packages/cocos2d-0.5.5-py2.7.egg/cocos/director.py", line 522, in get_window_size
 return ( self._window_virtual_width, self._window_virtual_height)
AttributeError: 'Director' object has no attribute '_window_virtual_width'

Answer 1

您需要在实例化第一个场景之前初始化导演。 director 是初始化屏幕、设置 Cocos2D 框架等的全局对象。

我发现了一些其他错误：

• 您需要将ColorLayer 更改为完全合格，例如cocos.layer.ColorLayer。
• on_enter 需要将 self 作为第一个参数。
• 您需要在您的 TestScene 类中定义 f_refresh_marks。

这是代码的工作副本。 （工作，从某种意义上说它不会抛出错误，而不是它进行任何类型的滚动。）

from cocos.director import director
from cocos.layer import base_layers


import sys
import math
import os

import pyglet
import cocos


world_width = 1000
world_height = 1000
class NetworkMap(cocos.layer.ScrollableLayer):
    def __init__(self, world_width, world_height):
        self.world_width = world_width
        self.world_height = world_height
        super(NetworkMap, self).__init__()
        bg = cocos.layer.ColorLayer(170,170,0,255,width=500,height=500)
        self.px_width = world_width
        self.px_height = world_height
        self.add(bg,z=0)

class TestScene(cocos.scene.Scene):
    def __init__(self):
        super(TestScene,self).__init__()

    def on_enter(self):
        director.push_handlers(self.on_cocos_resize)
        super(TestScene, self).on_enter()

    def on_cocos_resize(self, usable_width, usable_height):
        self.f_refresh_marks()

    def f_refresh_marks(self):
        pass

def main():
    director.init(world_width, world_height, do_not_scale=True)
    scene = TestScene()
    world_map = NetworkMap(world_width, world_height)
    scroller = cocos.layer.ScrollingManager()
    scroller.add(world_map)
    scene.add(scroller)
    director.run(scene)

if __name__ == '__main__': main()

Answer 2

我遇到了同样的问题（堆栈跟踪非常相似），这是因为我试图在调用 director.init() 之前创建一个层。将 director.init() 移到代码的前面为我修复了它。