我如何不断更新我在 kivy 中的标签？
how do i continously keep on updating my label in kivy?
我已经在这个问题上停留了几个小时了。
我正在制作一个自制的 smarthome 终端，并且已经对 kivy 进行了大约 2 周的修补，到目前为止它一直很棒。我现在想在屏幕内的标签内显示温度。我制作了一个带有 4 个按钮的操作栏，单击时可以在屏幕上滑动。在名为 "Thermostaat" 的第一个屏幕中，我想显示一个标签，其中包含从我编写的另一个外部脚本中读取的温度。我似乎无法获得标签内的温度，即使是虚拟值也是如此”
这是我的 main.py:
#!/usr/bin/env python3
from kivy.app import App
from kivy.uix.screenmanager import ScreenManager,Screen
from kivy.properties import ObjectProperty, StringProperty
from kivy.uix.boxlayout import BoxLayout
from kivy.clock import Clock
from kivy.uix.label import Label
from kivy.lang import Builder
class Menu(BoxLayout):
manager = ObjectProperty(None)
def __init__(self,**kwargs):
super(Menu, self).__init__(**kwargs)
Clock.schedule_interval(self.getTemp, 1)
def getTemp(self,dt):
thetemp = 55 #will be changed to temp.read()
self.ids.TempLabel.text = str(thetemp)
print(thetemp)
class ScreenThermo(Screen):
pass
class ScreenLight(Screen):
pass
class ScreenEnergy(Screen):
pass
class ScreenWeather(Screen):
pass
class Manager(ScreenManager):
screen_thermo = ObjectProperty(None)
screen_light = ObjectProperty(None)
screen_energy = ObjectProperty(None)
screen_weather = ObjectProperty(None)
class MenuApp(App):
def thermostaat(self):
print("Thermostaat")
def verlichting(self):
print("Verlichting")
def energie(self):
print("Energie")
def weer(self):
print("Het Weer")
def build(self):
Builder.load_file("test.kv")
return Menu()
if __name__ == '__main__':
MenuApp().run()
这是我的 .kv 文件：
#:kivy 1.10.0
<Menu>:
manager: screen_manager
orientation: "vertical"
ActionBar:
size_hint_y: 0.05
ActionView:
ActionPrevious:
ActionButton:
text: "Thermostaat"
on_press: root.manager.current= 'thermo'
on_release: app.thermostaat()
ActionButton:
text: "Verlichting"
#I want my screens to switch when clicking on this actionbar button
on_press: root.manager.current= 'light'
on_release: app.verlichting()
ActionButton:
text: "Energieverbruik"
on_press: root.manager.current= 'energy'
on_release: app.energie()
ActionButton:
text: "Het Weer"
on_press: root.manager.current= 'weather'
on_release: app.weer()
Manager:
id: screen_manager
<ScreenThermo>:
Label:
#this is where i want my label that shows the temperature my sensor reads
text: "stuff1"
<ScreenLight>:
Button:
text: "stuff2"
<ScreenEnergy>:
Button:
text: "stuff3"
<ScreenWeather>:
Button:
text: "stuff4"
<Manager>:
id: screen_manager
screen_thermo: screen_thermo
screen_light: screen_light
screen_energy: screen_energy
screen_weather: screen_weather
ScreenThermo:
id: screen_thermo
name: 'thermo'
manager: screen_manager
ScreenLight:
id: screen_light
name: 'light'
manager: screen_manager
ScreenEnergy:
id: screen_energy
name: 'energy'
manager: screen_manager
ScreenWeather:
id: screen_weather
name: 'weather'
manager: screen_manager
我经常遇到以下错误：
super(ObservableDict, self).__getattr__(attr))
AttributeError: 'super' object has no attribute '__getattr__'
如果您想知道，这是我的追溯：
Traceback (most recent call last):
File "main.py", line 57, in <module>
MenuApp().run()
File "/home/default/kivy/kivy/app.py", line 829, in run
runTouchApp()
File "/home/default/kivy/kivy/base.py", line 502, in runTouchApp
EventLoop.window.mainloop()
File "/home/default/kivy/kivy/core/window/window_pygame.py", line 403, in mainloop
self._mainloop()
File "/home/default/kivy/kivy/core/window/window_pygame.py", line 289, in _mainloop
EventLoop.idle()
File "/home/default/kivy/kivy/base.py", line 337, in idle
Clock.tick()
File "/home/default/kivy/kivy/clock.py", line 581, in tick
self._process_events()
File "kivy/_clock.pyx", line 367, in kivy._clock.CyClockBase._process_events
cpdef _process_events(self):
File "kivy/_clock.pyx", line 397, in kivy._clock.CyClockBase._process_events
raise
File "kivy/_clock.pyx", line 395, in kivy._clock.CyClockBase._process_events
event.tick(self._last_tick)
File "kivy/_clock.pyx", line 167, in kivy._clock.ClockEvent.tick
ret = callback(self._dt)
File "main.py", line 17, in getTemp
self.ids.TempLabel.text = str(thetemp)
File "kivy/properties.pyx", line 839, in kivy.properties.ObservableDict.__getattr__
super(ObservableDict, self).__getattr__(attr))
AttributeError: 'super' object has no attribute '__getattr__'
我希望有人愿意帮助我，因为我想继续这个项目，我的 SmartHome 设备的大部分功能已经可以使用了，所以最后一部分是制作一个像样的 GUI将其全部放入（控制灯光、控制室内温度等...）
使用字符串属性
<ScreenThermo>:
Label:
#this is where i want my label that shows the temperature my sensor reads
text: root.thermo_text
class ScreenThermo(BoxLayout):
thermo_text = StringProperty("stuff")
...
然后任何时候你想设置文本就可以了
my_screen.thermo_text = "ASD"
您的菜单中没有 id TempLabel
首先，您必须在您的 kv 中添加 TempLabel：
...
<ScreenThermo>:
Label:
id: TempLabel
text: "stuff1"
...
然后更新右边的标签：
...
class Menu(BoxLayout):
manager = ObjectProperty(None)
def __init__(self,**kwargs):
super(Menu, self).__init__(**kwargs)
Clock.schedule_interval(self.getTemp, 1)
def getTemp(self,dt):
thetemp = 55 #will be changed to temp.read()
self.manager.screen_thermo.ids.TempLabel.text = str(thetemp)
print(thetemp)
...
使用对象属性
在示例中，我使用 ObjectProperty 连接到温度标签，因为 id 是小部件的弱引用。使用 ObjectProperty 创建直接引用，提供更快的访问并且更明确。
main.py
1。导入外部脚本
from temperature import read_temperature
2。声明对象属性
class ScreenThermo(Screen):
temperature = ObjectProperty(None)
3。更新温度文本
def getTemp(self, dt):
temp = read_temperature()
print(temp)
self.manager.screen_thermo.temperature.text = str(temp)
menu.kv - kv 文件
4。将 ObjectProperty 连接到 id
<ScreenThermo>:
temperature: temperature
Label:
id: temperature
#this is where i want my label that shows the temperature my sensor reads
text: "stuff1"
temperature.py - 模拟器
这是模拟温度的外部脚本。
import random
def read_temperature():
return random.randint(0, 100)
输出
我已经在这个问题上停留了几个小时了。 我正在制作一个自制的 smarthome 终端，并且已经对 kivy 进行了大约 2 周的修补，到目前为止它一直很棒。我现在想在屏幕内的标签内显示温度。我制作了一个带有 4 个按钮的操作栏，单击时可以在屏幕上滑动。在名为 "Thermostaat" 的第一个屏幕中，我想显示一个标签，其中包含从我编写的另一个外部脚本中读取的温度。我似乎无法获得标签内的温度，即使是虚拟值也是如此” 这是我的 main.py:
#!/usr/bin/env python3
from kivy.app import App
from kivy.uix.screenmanager import ScreenManager,Screen
from kivy.properties import ObjectProperty, StringProperty
from kivy.uix.boxlayout import BoxLayout
from kivy.clock import Clock
from kivy.uix.label import Label
from kivy.lang import Builder
class Menu(BoxLayout):
manager = ObjectProperty(None)
def __init__(self,**kwargs):
super(Menu, self).__init__(**kwargs)
Clock.schedule_interval(self.getTemp, 1)
def getTemp(self,dt):
thetemp = 55 #will be changed to temp.read()
self.ids.TempLabel.text = str(thetemp)
print(thetemp)
class ScreenThermo(Screen):
pass
class ScreenLight(Screen):
pass
class ScreenEnergy(Screen):
pass
class ScreenWeather(Screen):
pass
class Manager(ScreenManager):
screen_thermo = ObjectProperty(None)
screen_light = ObjectProperty(None)
screen_energy = ObjectProperty(None)
screen_weather = ObjectProperty(None)
class MenuApp(App):
def thermostaat(self):
print("Thermostaat")
def verlichting(self):
print("Verlichting")
def energie(self):
print("Energie")
def weer(self):
print("Het Weer")
def build(self):
Builder.load_file("test.kv")
return Menu()
if __name__ == '__main__':
MenuApp().run()
这是我的 .kv 文件：
#:kivy 1.10.0
<Menu>:
manager: screen_manager
orientation: "vertical"
ActionBar:
size_hint_y: 0.05
ActionView:
ActionPrevious:
ActionButton:
text: "Thermostaat"
on_press: root.manager.current= 'thermo'
on_release: app.thermostaat()
ActionButton:
text: "Verlichting"
#I want my screens to switch when clicking on this actionbar button
on_press: root.manager.current= 'light'
on_release: app.verlichting()
ActionButton:
text: "Energieverbruik"
on_press: root.manager.current= 'energy'
on_release: app.energie()
ActionButton:
text: "Het Weer"
on_press: root.manager.current= 'weather'
on_release: app.weer()
Manager:
id: screen_manager
<ScreenThermo>:
Label:
#this is where i want my label that shows the temperature my sensor reads
text: "stuff1"
<ScreenLight>:
Button:
text: "stuff2"
<ScreenEnergy>:
Button:
text: "stuff3"
<ScreenWeather>:
Button:
text: "stuff4"
<Manager>:
id: screen_manager
screen_thermo: screen_thermo
screen_light: screen_light
screen_energy: screen_energy
screen_weather: screen_weather
ScreenThermo:
id: screen_thermo
name: 'thermo'
manager: screen_manager
ScreenLight:
id: screen_light
name: 'light'
manager: screen_manager
ScreenEnergy:
id: screen_energy
name: 'energy'
manager: screen_manager
ScreenWeather:
id: screen_weather
name: 'weather'
manager: screen_manager
我经常遇到以下错误：
super(ObservableDict, self).__getattr__(attr))
AttributeError: 'super' object has no attribute '__getattr__'
如果您想知道，这是我的追溯：
Traceback (most recent call last):
File "main.py", line 57, in <module>
MenuApp().run()
File "/home/default/kivy/kivy/app.py", line 829, in run
runTouchApp()
File "/home/default/kivy/kivy/base.py", line 502, in runTouchApp
EventLoop.window.mainloop()
File "/home/default/kivy/kivy/core/window/window_pygame.py", line 403, in mainloop
self._mainloop()
File "/home/default/kivy/kivy/core/window/window_pygame.py", line 289, in _mainloop
EventLoop.idle()
File "/home/default/kivy/kivy/base.py", line 337, in idle
Clock.tick()
File "/home/default/kivy/kivy/clock.py", line 581, in tick
self._process_events()
File "kivy/_clock.pyx", line 367, in kivy._clock.CyClockBase._process_events
cpdef _process_events(self):
File "kivy/_clock.pyx", line 397, in kivy._clock.CyClockBase._process_events
raise
File "kivy/_clock.pyx", line 395, in kivy._clock.CyClockBase._process_events
event.tick(self._last_tick)
File "kivy/_clock.pyx", line 167, in kivy._clock.ClockEvent.tick
ret = callback(self._dt)
File "main.py", line 17, in getTemp
self.ids.TempLabel.text = str(thetemp)
File "kivy/properties.pyx", line 839, in kivy.properties.ObservableDict.__getattr__
super(ObservableDict, self).__getattr__(attr))
AttributeError: 'super' object has no attribute '__getattr__'
我希望有人愿意帮助我，因为我想继续这个项目，我的 SmartHome 设备的大部分功能已经可以使用了，所以最后一部分是制作一个像样的 GUI将其全部放入（控制灯光、控制室内温度等...）
使用字符串属性
<ScreenThermo>:
Label:
#this is where i want my label that shows the temperature my sensor reads
text: root.thermo_text
class ScreenThermo(BoxLayout):
thermo_text = StringProperty("stuff")
...
然后任何时候你想设置文本就可以了
my_screen.thermo_text = "ASD"
您的菜单中没有 id TempLabel
首先，您必须在您的 kv 中添加 TempLabel：
...
<ScreenThermo>:
Label:
id: TempLabel
text: "stuff1"
...
然后更新右边的标签：
...
class Menu(BoxLayout):
manager = ObjectProperty(None)
def __init__(self,**kwargs):
super(Menu, self).__init__(**kwargs)
Clock.schedule_interval(self.getTemp, 1)
def getTemp(self,dt):
thetemp = 55 #will be changed to temp.read()
self.manager.screen_thermo.ids.TempLabel.text = str(thetemp)
print(thetemp)
...
使用对象属性
在示例中，我使用 ObjectProperty 连接到温度标签，因为 id 是小部件的弱引用。使用 ObjectProperty 创建直接引用，提供更快的访问并且更明确。
main.py
1。导入外部脚本
from temperature import read_temperature
2。声明对象属性
class ScreenThermo(Screen):
temperature = ObjectProperty(None)
3。更新温度文本
def getTemp(self, dt):
temp = read_temperature()
print(temp)
self.manager.screen_thermo.temperature.text = str(temp)
menu.kv - kv 文件
4。将 ObjectProperty 连接到 id
<ScreenThermo>:
temperature: temperature
Label:
id: temperature
#this is where i want my label that shows the temperature my sensor reads
text: "stuff1"
temperature.py - 模拟器
这是模拟温度的外部脚本。
import random
def read_temperature():
return random.randint(0, 100)