PyGame press two buttons at the same time

问题

I wrote this:

import pygame

finish = False
while not finish:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            finish = True
    if event.type == pygame.KEYDOWN:
        if event.key == pygame.K_UP:
            print "A"
        if event.key == pygame.K_RIGHT:
            print "B"
        if event.key == pygame.K_LEFT:
            print "C"

Why can't I press two buttons at the same time?

回答1:

The keyboard events (e.g. pygame.KEYDOWN) occure only once when a button is pressed.
Use pygame.key.get_pressed() to continuously evaluate the states of the buttons. e.g.:

finish = False
while not finish:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            finish = True

    keys = pygame.key.get_pressed()
    if keys[pygame.K_UP]:
        print "A"
    if keys[pygame.K_RIGHT]:
        print "B"
    if keys[pygame.K_LEFT]:
        print "C"

Or if you would rather get a list:

finish = False
while not finish:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            finish = True

    keys = pygame.key.get_pressed()
    if any(keys):
        kmap = {pygame.K_UP : "A", pygame.K_RIGHT : "B", pygame.K_LEFT : "C"}
        sl = [kmap[key] for key in kmap if keys[key]]
        print sl

回答2:

Try this:

import pygame

finish = False
while not finish:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            finish = True
        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_UP:
                print "A"
            if event.key == pygame.K_RIGHT:
                print "B"
            if event.key == pygame.K_LEFT:
                print "C"

In your version you're iterating over pygame.event.get() and you evaluate only the last event in the for loop (apart from the quit logic), meaning you only evaluate the last keypress. Move the code into the loop and you can evaluate all the events.

If you want to detect multiple keypresses then use pygame.key.get_pressed()

finish = False
while not finish:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            finish = True

    keys = pygame.key.get_pressed()
    if keys[pygame.K_LEFT]:
        print("C")    
    if keys[pygame.K_RIGHT]:
        print("B")
    if keys[pygame.K_UP]:
        print("A")

来源：https://stackoverflow.com/questions/59181962/pygame-press-two-buttons-at-the-same-time

标签

python

python-2.7

events

pygame