Question

我正在制作一款带有10英寸触摸屏的覆盆子pi的游戏，我决定使用Tkinter来与pi进行交互。目前，一旦用户选择了他们的游戏模式，并且他们被带到这个屏幕，我然后尝试在这个屏幕上放置一个标签显示他们的当前级别，代码运行，tkinter窗口停止响应，但命令行中的代码仍在继续。以下是在生存屏幕上运行的代码：

def start_survival(game):
    while game.health != 0:  
        print(str(game.level))#for Testing

        lbl = Label(root, text=lbBlue, font=SMALL_BUTTON_FONT)
        lbl['text'] = 'level: ' + str(game.level)
        lbl.place(x=35, y=15)
        print('Where is: ' + str(game.newDistance())+ ' and allowance is: ' + str(game.allowance))

        #game.newDistance()
        #count down
        game.measureDistance()
        if game.playerDistance >= game.lowerBound() and game.playerDistance <= game.upperBound():
            game.level += 1
            print('NEXT LEVEL')
        else:
            game.health -= 1
            print('Ouch! You just lost a life your health is now: ' + str(game.health))
            #u guessed ..... which is not in the range ..... ---->  little diagram
        game.allowance = int(game.allowance*0.90)

        if game.allowance > 5:
            game.allowance = int(game.allowance*0.90)

所以上述所有内容都来自：

game = gamemode_normal()
root.after(100, lambda: start_survival(game))

如果有人对可能存在的问题有任何想法，请分享！谢谢汤姆

Answer 1

您需要在放置标签后更新显示，因为您的代码仍在运行。无需手动运行root.update()，Tkinter会在更新显示内容之前等待代码完成。这就是当你用Ctrl-C结束程序时出现的原因。这是新代码：

def start_survival(game):
    while game.health != 0:  
        print(str(game.level))#for Testing

        lbl = Label(root, text=lbBlue, font=SMALL_BUTTON_FONT)
        lbl['text'] = 'level: ' + str(game.level)
        lbl.place(x=35, y=15)
        root.update()
        print('Where is: ' + str(game.newDistance())+ ' and allowance is: ' + str(game.allowance))

        #game.newDistance()
        #count down
        game.measureDistance()
        if game.playerDistance >= game.lowerBound() and game.playerDistance <= game.upperBound():
            game.level += 1
            print('NEXT LEVEL')
        else:
            game.health -= 1
            print('Ouch! You just lost a life your health is now: ' + str(game.health))
            #u guessed ..... which is not in the range ..... ---->  little diagram
        game.allowance = int(game.allowance*0.90)

        if game.allowance > 5:
            game.allowance = int(game.allowance*0.90)

许多人将update函数与mainloop函数混淆。这两个函数之间的区别在于mainloop函数阻塞，这意味着它不允许代码在调用后继续运行 - 通过在函数内部运行无限循环。但是update函数只运行显示所有内容所需的次数，然后结束并继续执行代码。

Answer 2

也许你应该尝试在 lbl 的定义下做 lbl.pack()。通常有帮助

Tkinter标签没有出现

2 个答案: