多次调用函数tkin

Question

我有一个关于after函数以及它在mainloop中如何工作的问题。 我编写了下面的代码，我注意到我可以多次调用after函数。这使得球每次被召唤时移动得更快。我想在不按几次按钮的情况下复制它。在

另外，有人能解释一下，按几次“开始”按钮会使球跑得更快吗。在

PS：对不起我的英语，我是法国人。。。在

from tkinter import *

def bouge():
    global speedx,speedy,run,i

    colors=["white", "black", "red", "green", "blue", "cyan", "yellow"]

    pos = can1.coords(oval1)
    if pos[0] <= 0 or pos[0] >= 450:
        speedx *= -1
        can1.itemconfig(oval1,fill=colors[i])
        i+=1
        i=i%6
    if pos[1]<=0 or pos[1]>=450:
        speedy*=-1

    can1.move(oval1, speedx, speedy)
    text1.configure(text=pos)
    if run:
        can1.after(30, bouge)

def stop():
    global run
    run=False

def start():
    global run
    run=True
    bouge()

x1, y1 = 100, 250
speedx=5
speedy=6
run=True
i=0
fen1 = Tk()
fen1.title("Arkanoid made by Rico")
can1 = Canvas(fen1, height=500, width=500,background='lightblue')
oval1 = can1.create_oval(x1, y1, x1 + 50, y1 + 50, fill='yellow')
rec1=can1.create_rectangle(225,480,275,500,fill='grey')
pos=can1.coords(oval1)
Button(fen1, text='GO!!', command=start).grid(row=2, column=1, sticky=S)
Button(fen1, text='Quitter', command=fen1.quit).grid(row=2, column=3, sticky=S)
Button(fen1, text='Stop', command=stop).grid(row=2, column=2, sticky=S)
text1=Label(fen1,text=pos)
text1.grid(row=2,column=4)
can1.grid(row=1,columnspan=5)

fen1.mainloop()

Answer 1

    from tkinter import *

def speedup():
    global vit
    if vit>2:
        vit-=2
        can1.after(500,speedup)

def bouge():
    global speedx,speedy,run,i

    colors=["white", "black", "red", "green", "blue", "cyan", "yellow"]

    pos = can1.coords(oval1)
    if pos[0] <= 0 or pos[0] >= 450:
        speedx *= -1
        can1.itemconfig(oval1,fill=colors[i])
        i+=1
        i=i%6
    if pos[1]<=0 or pos[1]>=450:
        speedy*=-1

    can1.move(oval1, speedx, speedy)
    text1.configure(text=(pos,vit))

    if run:
        can1.after(vit, bouge)


def stop():
    global run
    run=False

def start():
    global run
    run=True
    bouge()
    speedup()

x1, y1 = 100, 250
speedx=6
speedy=7
run=True
i=0
vit=100
fen1 = Tk()
fen1.title("Arkanoid made by Rico")
can1 = Canvas(fen1, height=500, width=500,background='lightblue')
oval1 = can1.create_oval(x1, y1, x1 + 50, y1 + 50, fill='yellow')
rec1=can1.create_rectangle(225,480,275,500,fill='grey')
pos=can1.coords(oval1)
Button(fen1, text='GO!!', command=start).grid(row=2, column=1, sticky=S)
Button(fen1, text='Quitter', command=fen1.quit).grid(row=2, column=3, sticky=S)
Button(fen1, text='Stop', command=stop).grid(row=2, column=2, sticky=S)
text1=Label(fen1,text=pos)
text1.grid(row=2,column=4)
can1.grid(row=1,columnspan=5)

fen1.mainloop()