如何让我的代码循环直到我按下按钮乐高 EV3

问题描述

这个问题很简单。我试过使用 while 循环，重新排列代码，但所有发生的事情是程序在我按下按钮时启动，或者什么也不做。谁能看到我做错了什么？

#!/usr/bin/env python3
from ev3dev2.motor import MoveTank,OUTPUT_B,OUTPUT_C
from ev3dev2.button import Button
from ev3dev2.sound import Sound
from time import sleep
import time

sound = Sound()
btn = Button()
tank_pair = MoveTank(OUTPUT_B,OUTPUT_C)

def movement(left_speed,right_speed,rotations):
tank_pair.on_for_rotations(left_speed,rotations,brake=True,block=True)


while not btn.any():
movement(20,20,10)
movement(-100,1.5)
movement(20,10)
sleep(0.01)

while btn.any():
sleep(0.01)
tank_pair.off()
sound.beep()
exit()

解决方法

你可以用这个来打破你的主循环

pip install keyboard

然后

import keyboard

while True:
    # do something
    if keyboard.is_pressed("q"):
        print("q pressed,ending loop")
        break

,

您的缩进不正确。

from ev3dev2.motor import MoveTank,OUTPUT_B,OUTPUT_C
from ev3dev2.button import Button
from ev3dev2.sound import Sound
from time import sleep
import time

sound = Sound()
btn = Button()
tank_pair = MoveTank(OUTPUT_B,OUTPUT_C)

def movement(left_speed,right_speed,rotations):
    tank_pair.on_for_rotations(left_speed,rotations,brake=True,block=True)


while not btn.any():
    movement(20,20,10)
    movement(-100,1.5)
    movement(20,10)
    sleep(0.01)

while btn.any():
    sleep(0.01)
    tank_pair.off()
    sound.beep()
    exit()