Question

我试图在Tkinter制作一个简单的俄罗斯方块游戏，但实际的窗口不会打开。如果我不使用time（）函数使游戏片段掉落，它将绘制，但是一旦我添加time（）函数，窗口就会消失。我可以看到该程序正在通过打印掉落片的坐标来工作，但是我的代码的下降方面似乎干扰了tkinter窗口的绘制。

为什么程序没有画出窗口？

from tkinter import *
from tkinter import ttk
import random
import time

root = Tk()
root.title('Emblas tetris game')

x_init = root.winfo_pointerx()
y_init = root.winfo_pointery()
WIDTH = root.winfo_screenwidth()
HEIGHT = root.winfo_screenheight()
basicbox = Canvas(root, width=WIDTH, height=HEIGHT)
basicbox.pack()
gameboard = basicbox.create_rectangle(WIDTH/6, 0, WIDTH * 0.84, 720, 
outline='gray', fill='white', width=4)

#------- FIGURES -------------------------------------------
def countpointsinfig(): #redraws each figure as it is falling, updating all coordinates
    global x0, y0, x1, y1, x2, y2, x3, y3
    numpoints = len(points)
    if numpoints == 8:
        x0, y0, x1, y1, x2, y2, x3, y3  = basicbox.coords(drawshape)
        print(x0, y0, x1, y1, x2, y2, x3, y3)


def I_shape():
    global drawshape, points
    points = [WIDTH/2 - 10, 0,#0
              WIDTH/2 + 10, 0,#1
              WIDTH/2 + 10, 80,#2
              WIDTH/2 - 10, 80,#3
              ]
    drawshape = basicbox.create_polygon(points, outline='yellow', fill='yellow')


def O_shape():
    global drawshape, points
    points = [WIDTH/2 - 20,  0,#0
              WIDTH/2 + 20,  0,#1
              WIDTH/2 + 20, 40,#2
              WIDTH/2 - 20, 40,#3
              ]
    drawshape = basicbox.create_polygon(points, outline='red', fill='red')


#--------- GAME -----------------------------------------------
def startgame():
    global rand_shape, pickone
    pickone = [I_shape, O_shape]
    rand_shape = random.choice(pickone)()

    autofall = True #very very VERY interesting....... This is the problem. This function should move my tetris piece down. If i remove this bit the code works. Why?
    while autofall:
        time.sleep(1)
        basicbox.move(drawshape, 0, 20)
        countpointsinfig()

#----------- MOVE FIGURES -----------------------

def leftmove(event):
    countpointsinfig()
    basicbox.move(drawshape, -20, 0)

def rightmove(event):
    countpointsinfig()
    basicbox.move(drawshape, 20, 0)

def downmove(event):
    countpointsinfig()
    basicbox.move(drawshape, 0, 20)


root.bind('<Left>', leftmove)
root.bind('<Right>', rightmove)
root.bind('<Up>', upmove)
root.bind('<Down>', downmove)
#----------------------------------------------------------------

startgame()
root.mainloop()

Answer 1

root.mainloop() while autofall是问题所在。

在this other post中，您可以了解mainloop()的作用。

解决问题的简便方法是使用after()方法。

更改此代码：

def startgame():
    global rand_shape, pickone
    pickone = [I_shape, O_shape]
    rand_shape = random.choice(pickone)()

    autofall = True 
    while autofall:
        time.sleep(1)
        basicbox.move(drawshape, 0, 20)
        countpointsinfig()

为此：

def startgame():
    global rand_shape, pickone
    pickone = [I_shape, O_shape]
    rand_shape = random.choice(pickone)()
    autofall()

def autofall():
    basicbox.move(drawshape, 0, 20)
    countpointsinfig()
    basicbox.after(1000,autofall)

我的俄罗斯方块游戏不断崩溃（tkinter）（python）

1 个答案: