我试图在自我之后添加实例,但仍然无法正常工作
这是错误消息
File "kivy\_event.pyx", line 703, in kivy._event.EventDispatcher.dispatch
File "kivy\_event.pyx", line 1214, in kivy._event.EventObservers.dispatch
File "kivy\_event.pyx", line 1138, in kivy._event.EventObservers._dispatch
TypeError: sss() takes 1 positional argument but 2 were given
这是完整的kivy python代码
import kivy
from kivy.uix.widget import Widget
from kivy.properties import ObjectProperty
from kivy.app import App
from kivy.uix.label import Label
from kivy.uix.gridlayout import GridLayout
from kivy.uix.textinput import TextInput
from kivy.uix.button import Button
from kivy.uix.screenmanager import ScreenManager, Screen
class Touch(Widget):
def __init__(self, **kwargs):
super(Touch, self).__init__(**kwargs)
self.cols = 1
self.Rc1 = Button(text="Submit", font_size=40)
self.Rc1.bind(on_press=self.sss)
self.add_widget(self.Rc1)
def sss(self):
self.Rc1 = Button(text="Push Me !",
font_size="20sp",
background_color=[1, 0, 0, 1],
color=(1, 1, 1, 1),
size=(32, 32),
size_hint=(.2, .2),
pos=(300, 250))
class MyApp(App):
def build(self):
return Touch()
if __name__ == "__main__":
MyApp().run()
当您单击按钮时,它将使用一些信息执行您的功能。在不同的GUI中,它可以使用不同的信息。在某些GUI中,它可以是有关事件的信息,在其他GUI中,可以是有关小部件的信息,等等。
Kivy
发送有关单击的小部件的信息,您必须接收它
def sss(self, widget):
如果要更改现有Button
按钮,则不要创建新按钮-如果将其赋给相同的变量,它将不会更改现有按钮。您将必须使用以下命令删除旧按钮并添加新按钮add_widget()
您已有按钮,self.Rc1
可以这样做
def sss(self, widget):
self.Rc1.text = "Push Me !"
self.Rc1.font_size = "20sp"
self.Rc1.background_color = [1, 0, 0, 1]
self.Rc1.color = (1, 1, 1, 1)
self.Rc1.size = (32, 32)
self.Rc1.size_hint = (.2, .2)
self.Rc1.pos = (300, 250)
但更有趣的是,您还获得了此小部件sss(self, widget):
,您可以执行
def change_button(self, widget):
widget.text = "Push Me !"
widget.font_size = "20sp"
widget.background_color = [1, 0, 0, 1]
widget.color = (1, 1, 1, 1)
widget.size = (32, 32)
widget.size_hint = (.2, .2)
widget.pos = (300, 250)
这样,您可以通过不同的按钮使用相同的功能
import kivy
from kivy.uix.widget import Widget
from kivy.app import App
from kivy.uix.button import Button
class Touch(Widget):
def __init__(self, **kwargs):
super(Touch, self).__init__(**kwargs)
#self.all_buttons = []
for row in range(10):
for col in range(10):
x = col * 100
y = row * 100
button = Button(text=f"{row},{col}", pos = (x, y))
button.bind(on_press=self.change_button)
self.add_widget(button)
#self.all_buttons.append(button)
def change_button(self, widget):
if widget.background_color == [1,1,1,1]:
widget.background_color = [1, 0, 0, 1]
else:
widget.background_color = [1, 1, 1, 1]
class MyApp(App):
def build(self):
return Touch()
if __name__ == "__main__":
MyApp().run()
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