Question

我正在做游戏，我希望角色一直保持按住箭头键才能移动。

我尝试制作一个新按钮，但是我是python的新手，这很令人困惑。我也尝试过制作“保持按钮”和“释放按钮”功能，但这很令人困惑。

这是我的代码。

from tkinter import *
import time
import threading


window = Tk()
window.title("Making things move")


window.bind("<Escape>", lambda e: window.quit()) #binds escape key to close window


winwidth = window.winfo_screenwidth()
winheight = window.winfo_screenheight()


#making a canvas to input images
playground = Canvas(window, width=winwidth, height=winheight, bg="silver")
playground.pack(expand=YES, fill="both")


#making an image and placing it on the canvas
path1=PhotoImage(file="tank1FINAL.png")
tank1=playground.create_image(winwidth/2,winheight/2, image=path1)

path2=PhotoImage(file="tank1FLIP.png")


#tells what to do when keybind is used
def downKeyTank1(event):
    for i in range(25):
        playground.move(tank1, 0,2)
        time.sleep(.025)
        window.update()

def upKeyTank1(event):
    for i in range(25):
        playground.move(tank1, 0,-2)
        time.sleep(.025)
        window.update()

def leftKeyTank1(event):
    #flips the image when key is pressed
    global path1, path2, tank1
    x, y =playground.coords(tank1)
    playground.delete(tank1)
    tank1 =playground.create_image(x, y, image=path2)
    #makes image move continuously
    for i in range(50):
        playground.move(tank1, -1,0)
        time.sleep(.025)
        window.update()

def rightKeyTank1(event):
    global path1, path2, tank1
    x, y =playground.coords(tank1)
    playground.delete(tank1)
    tank1 =playground.create_image(x, y, image=path1)
    for i in range(50):
        playground.move(tank1, 1, 0)
        time.sleep(.025)
        window.update()


#creates a keybind to movement
playground.bind_all('<Up>', upKeyTank1)
playground.bind_all('<Left>', leftKeyTank1)
playground.bind_all('<Right>', rightKeyTank1)
playground.bind_all('<Down>', downKeyTank1)


window.mainloop()

一些错误消息，与问题无关。

Answer 1

您可以使用<KeyPress>和<KeyRelease>来获取按键的按下时间和按键的释放时间。您可以使用它为变量True，False

分配move_up或move_down

您可以after()运行将检查这些变量并移动储罐的功能。

import tkinter as tk

# --- functions ---

def move():

    if move_down:    
        playground.move(tank1, 0, 2)
    if move_up:
        playground.move(tank1, 0, -2)
    if move_left:
        playground.move(tank1, -2, 0)
    if move_right:
        playground.move(tank1, 2, 0)

    window.after(20, move)

def key_pressed(event):
    global move_down
    global move_up
    global move_left
    global move_right

    if event.keysym == 'Up':
        move_up = True
    if event.keysym == 'Down':
        move_down = True
    if event.keysym == 'Left':
        move_left = True
    if event.keysym == 'Right':
        move_right = True

def key_released(event):
    global move_down
    global move_up
    global move_left
    global move_right

    if event.keysym == 'Up':
        move_up = False
    if event.keysym == 'Down':
        move_down = False
    if event.keysym == 'Left':
        move_left = False
    if event.keysym == 'Right':
        move_right = False

# --- main ---

move_down = False
move_up = False
move_left = False
move_right = False

window = tk.Tk()

playground = tk.Canvas(window)
playground.pack(expand=True, fill="both")

tank1 = playground.create_rectangle((0,0,10,10))

playground.bind_all('<KeyPress>', key_pressed)
playground.bind_all('<KeyRelease>', key_released)

move()

window.mainloop()

如何在按住Tkinter的同时移动图像

1 个答案: