如何在kivy中更改gridLayout中特定按钮的颜色

Question

我正在尝试用 Python 和 Kivy 制作 tambola 硬币拾取器，我是 kivy 的新手。在这里，我创建了从 1 到 90 的网格布局按钮。我想在选择数字时更改网格布局中特定按钮的颜色。我在使用新的彩色按钮更新网格布局时遇到问题。

#!/usr/bin/python

from kivy.app import App

from kivy.uix.button import Button

from kivy.uix.label import Label

from kivy.uix.floatlayout import FloatLayout

from kivy.uix.gridlayout import GridLayout 

from kivy.graphics import Color

import random

coins = random.sample(range(1,91), 90)

#print(coins)

picked_coins=[]

current_coin=0

#print(picked_coins)

class Housie(FloatLayout):

    def __init__(self,**kwargs):

        super(Housie,self).__init__(**kwargs)

        self.title = Label(text="Housie Coin Picker",font_size = 50,size_hint=(1, .55),pos_hint={'x':0, 'y':.45})

        self.main_label = Label(text = "Click PICK NUMBER", size_hint=(1, .60),pos_hint={'x':0, 'y':.35})

        self.picked_ones = Label(text = "picked_coins", size_hint=(1, .40),pos_hint={'x':0, 'y':.40})

        self.help_button = Button(text = "PICK NUMBER", size_hint=(.3, .1),pos_hint={'x':.65, 'y':.1},on_press = self.update)

        self.add_widget(self.title)

        self.add_widget(self.main_label)

        self.add_widget(self.picked_ones)

        self.add_widget(self.help_button)

        self.add_widget(self.userinterface())

    def userinterface(self):

        self.layout = GridLayout(cols = 10,size_hint=(.50, .50))

        for i in range(1,91):

            self.layout.add_widget(Button(background_color=(1,0,0,1),text =str(i)))

        return self.layout

    def update(self,event):

        for coin in coins:

            if coin not in picked_coins:

                current_coin=coin

                picked_coins.append(coin)

                self.main_label.text = str(coin)

                for i in self.layout.children:

                    if i.text == str(coin):

                     #What to do Here?

Answer 1

您可以Button像这样将一个方法绑定到每个方法：def userinterface(self):    self.layout = GridLayout(cols = 10,size_hint=(.50, .50))    for i in range(1,91):        self.layout.add_widget(Button(background_color=(1,0,0,1),text=str(i), on_release=self.butt_pressed))    return self.layoutdef butt_pressed(self, button):    button.background_normal = ''    button.background_color = (1,0,0,1)Thbutt_pressed()方法更改了 pessed 的背景颜色Button。