Question

我正在使用Tkinter开发简单的空间入侵者克隆。目前我正试图找出一种方法，如何以一定的速度将敌人放在一条线上...当我将速度设置为move_enemy()到1000毫秒时，游戏开始出现滞后。非常感谢帮助，谢谢。

from tkinter import *
# creates window
window = Tk()
size = window.winfo_screenheight()
window.title("This is a window")
# set up geometry using string formatting operator %
window.geometry("%dx%d+%d+%d" % (1000, 1000, 10, 10))
window.update()
# creates canvas
global canvas
canvas = Canvas(window, bg='green')
# pack is a layout manager
canvas.pack(fill=BOTH, expand=1)
canvas.update()
canvas.create_rectangle(0, 1000, 1000, 0, fill="orange", width=10, outline="white",     tag="border")

def shooting():
    global loaded_gun

    c = canvas.coords("player")
    canvas.create_line(c[0],c[1] + 20,c[2],c[3],width=5,fill="yellow",tag="shot")
    loaded_gun = 0


def move_shot(name):
    canvas.after(50)
    canvas.move(name,0,-20)
    canvas.update()

def on_key_press(event):

    global canvas,loaded_gun


    c = canvas.coords("player")

    if event.keysym == 'Left' and c[0] > 0:
        canvas.move("player", -20,0)
    elif event.keysym == 'Right' and c[2] < 1000:
        canvas.move("player", 20, 0)
    elif event.keysym == 'space':
        if loaded_gun == 1:
            shooting()
    elif event.keysym == 'Shift_L':
        loaded_gun = 1
        canvas.delete("shot")

def draw_enemy():
    c = [100,100,170,170]
    inc = 100

    for x in range(0,8):
        for y in range(0,4):
            canvas.create_rectangle(c[0] + inc * x,c[1] + inc * y,c[2] + inc * x,c[3] + inc * y,fill="red",tag="enemy")

def move_enemy():
    canvas.after(1000)
    canvas.move("enemy",0,20)


canvas.create_line(500, 950,500,1000, width=15, fill="red",tag="player")

loaded_gun = 1

draw_enemy()


while True:
    move_shot("shot")
    move_enemy()
    canvas.bind_all('<Key>', on_key_press)


window.mainloop()

Answer 1

Tkinterbook：Widget after method

您也可以省略回调。如果你这样做，这个方法只是等待对于给定的毫秒数，不提供任何事件（相同 as time.sleep（delay_ms * 0.001））。

所以canvas.after(1000)（没有第二个参数）作为time.sleep(1)工作，它会停止所有程序1秒钟（1000毫秒）

修改

from tkinter import * # creates window window = Tk() size = window.winfo_screenheight() window.title("This is a window") # set up geometry using string formatting operator % window.geometry("%dx%d+%d+%d" % (1000, 1000, 10, 10)) window.update() # creates canvas global canvas canvas = Canvas(window, bg='green') # pack is a layout manager canvas.pack(fill=BOTH, expand=1) canvas.update() canvas.create_rectangle(0, 1000, 1000, 0, fill="orange", width=10, outline="white", tag="border") def shooting(): global loaded_gun c = canvas.coords("player") canvas.create_line(c[0],c[1] + 20,c[2],c[3],width=5,fill="yellow",tag="shot") loaded_gun = 0 move_shot("shot") # furas def move_shot(name): canvas.move(name,0,-20) canvas.update() window.after(50, move_shot, "shot") # furas def on_key_press(event): global canvas, loaded_gun c = canvas.coords("player") if event.keysym == 'Left' and c[0] > 0: canvas.move("player", -20,0) elif event.keysym == 'Right' and c[2] < 1000: canvas.move("player", 20, 0) elif event.keysym == 'space': if loaded_gun == 1: shooting() elif event.keysym == 'Shift_L': loaded_gun = 1 canvas.delete("shot") def draw_enemy(): c = [100,100,170,170] inc = 100 for x in range(0,8): for y in range(0,4): canvas.create_rectangle(c[0] + inc * x,c[1] + inc * y,c[2] + inc * x,c[3] + inc * y,fill="red",tag="enemy") def move_enemy(): canvas.move("enemy",0,20) window.after(1000, move_enemy) # furas canvas.create_line(500, 950,500,1000, width=15, fill="red",tag="player") loaded_gun = 1 draw_enemy() window.bind_all('<Key>', on_key_press) # furas #move_shot() # furas move_enemy() # furas window.mainloop()

Tkinter ......太空侵略者......敌人的运动

1 个答案: