Question

执行第一个if语句（if event.type = KEYDOWN）但第三个一个人似乎没有。我希望在按下加号键并且字符串变量非空时执行if语句。

from pygame import init, display, font
from pygame.event import get as event_getter
from pygame.locals import *
import time
init()
surf = display.set_mode((400,400))
string =""
num = ['1','2','3','4','5','6','7','8','9','0']
adder = ""
while True:
    time.sleep(0.1)
    surf.fill((0, )*3)
    for event in event_getter():
        if event.type == KEYDOWN:
            if event.key == K_BACKSPACE:
                string = string[:-1]
                print("backspace")
            if str(event.unicode) in num:
                string += str(event.unicode)
                print("num")
            if event.key == K_PLUS and len(string) >0:
                adder = string
                string = ""
                print(adder)

    surf.blit(font.Font(None,50).render(string,1,(255, )*3),(100,100))
    display.flip()

Answer 1

我无法在Windows上使用K_PLUS，因此最好只使用密钥代码。运行下面的代码，当您按下某个键时，您将看到键代码的整数值。（目前该值设置为61，我相信是英国键盘布局的代码，但似乎45的值适用于其他键盘布局）

from pygame import init, display, font
from pygame.event import get as event_getter
from pygame.locals import *
import time
init()
surf = display.set_mode((400,400))
string =""
num = ['1','2','3','4','5','6','7','8','9','0']
adder = ""
while True:
    time.sleep(0.1)
    surf.fill((0, )*3)
    for event in event_getter():
        if event.type == KEYDOWN:
            print("Event key: %s" % (event.key))
            if event.key == K_BACKSPACE:
                string = string[:-1]
                print("backspace")
            if str(event.unicode) in num:
                string += str(event.unicode)
                print("num")
            if event.key == 61 and len(string) >0:
                print("+ pressed")
                adder = string
                string = ""
                print(adder)

    surf.blit(font.Font(None,50).render(string,1,(255, )*3),(100,100))
    display.flip()

Answer 2

＆＃34; shift =＆＃34;是＆＃34; +＆＃34;。
ord（＆＃39; =＆＃39;）是61
最好如下：

mods = pygame.key.get_mods()
if event.key ==pygame.K_KP_PLUS or (event.key==ord('=') and mods & pygame.KMOD_SHIFT):    # "shift =" is "+" 
  print("+ pressed")

我无法使event.key语句工作

2 个答案: