Python Kivy:如何使用numericproperty更改小部件大小?
试图使砖块小部件在每次重新启动时改变大小 py文件已被删除Python Kivy:如何使用numericproperty更改小部件大小?,python,widget,size,kivy,Python,Widget,Size,Kivy,试图使砖块小部件在每次重新启动时改变大小 py文件已被删除 class Game(FloatLayout): player = ObjectProperty(None) playbutton = ObjectProperty(None) ratebutton = ObjectProperty(None) brickg = ObjectProperty(None) ballsin = NumericProperty(0) bricklist = Li
class Game(FloatLayout):
player = ObjectProperty(None)
playbutton = ObjectProperty(None)
ratebutton = ObjectProperty(None)
brickg = ObjectProperty(None)
ballsin = NumericProperty(0)
bricklist = ListProperty([])
score = NumericProperty(0)
switch = NumericProperty(0)
level = NumericProperty(0)
def __init__(self, *args, **kwargs):
super(Game, self).__init__(*args, **kwargs)
Clock.schedule_interval(self.update, 1./60)
def spawn_brick(self, *args):
b2 = BrickGreen(x=randint(50, self.width - 50), \
y=randint(self.height - self.height / 4, self.height - (self.height/13)))
self.bricklist.append(b2)
self.add_widget(b2)
def check_brick_spawn(self, *args):
if len(self.bricklist) == 0:
if self.level == 0:
BrickGreen.brickwidth = 100
self.spawn_brick()
elif self.level == 1:
BrickGreen.brickwidth = 75
self.spawn_brick()
else:
BrickGreen.brickwidth = 50
self.spawn_brick()
class BrickGreen(Widget):
def __init__(self, **kwargs):
super(BrickGreen, self).__init__(**kwargs)
brickwidth = NumericProperty(0)
而kv文件
<BrickGreen>:
size_hint: None, None
size: self.brickwidth, 25
canvas:
Color:
rgba: 0, 1, 0, 1
Rectangle:
pos: self.pos
size: self.size
:
大小提示:无,无
尺寸:self.brickwidth,25
画布:
颜色:
rgba:0,1,0,1
矩形:
pos:self.pos
大小:self.size
从本质上讲,0级应该有长度为100的砖块,一旦打破,它将进入1级,并应产生长度为75的砖块,但它保持在100
BrickGreen.brickwidth=100
这将用数字100替换类级别的NumericProperty。您需要为对象的实例而不是类本身设置brickwidth的值。在这种情况下,您可以(例如)将希望的宽度传递给spawn_brick
方法,并在实例化BrickGreen时使用它
您还需要在类级别声明NumericProperty,而不是在\uuuu init\uuuu
中
我建议您阅读kivy关于属性的文档,并仔细阅读示例,了解如何使用这些属性。太好了,谢谢您。这很有效,但我现在有个问题。球只会与小部件的一部分碰撞。因此,当我通过spawn_brick函数添加小部件时,我将小部件的长度设置为300,但是球只会与小部件的大约100宽度发生碰撞。