Python 新手，使用 Raspberry Pi、GPIO 和 pygame。如果在播放媒體文件時(shí)按下按鈕，我想結(jié)束循環(huán)?，F(xiàn)在我有了它，所以你按下按鈕，mp3 文件就會(huì)一直播放（這是一個(gè) 30 分鐘的剪輯）。我希望如此，如果再次按下按鈕，媒體會(huì)重置并從頭開(kāi)始播放。我嘗試添加一個(gè) break 和一個(gè) if 語(yǔ)句，但它只是忽略它，因?yàn)?mp3 文件已經(jīng)在播放。我該怎么做呢？這是我的代碼的樣子：while True:while GPIO.input(buttonPin) == GPIO.LOW: if GPIO.input(buttonPin) == GPIO.LOW: pygame.mixer.init() pygame.mixer.music.load(open("audio.mp3")) pygame.mixer.music.play() while pygame.mixer.music.get_busy(): time.sleep(1) else: break
1 回答
子衿沉夜
TA貢獻(xiàn)1828條經(jīng)驗(yàn) 獲得超3個(gè)贊
嘗試這個(gè)：
musicplay = False #This variable will be used as a "toggle". When the button is pressed, it will flick from false to true, or true to false
def playbackmedia(): # Define function that is called when button pin is pressed
global musicplay # musicplay is a global variable that is outside of the scope of function
musicplay = not musicplay # Here we are toggling the music play
if musicplay: # if music play is true, play music
pygame.mixer.init()
pygame.mixer.music.load(open("audio.mp3"))
pygame.mixer.music.play()
else: # if music play is false, stop the music
pygame.mixer.stop()
def loop():
#GPIO here add_event_detect will detect when the buttonPin has a falling edge (Just as the button is pressed)
#The bounce time is to give you enough time for the signal to be read clearly. If this wasn't used, when you press the button,
#because of mechanical vibration, the connections fluctuate and it could be read by the Pi as pressing the button really quickly over and over
#again until you let go of the button. You have 300 milliseconds to let go of the button before the playback media function is called
GPIO.add_event_detect(buttonPin, GPIO.FALLING, callback=playbackmedia, bouncetime=300)
while True:
pass
我建議您訪問(wèn) pygame 網(wǎng)站以獲取有關(guān)如何控制混音器的更多詳細(xì)信息。
https://www.pygame.org/docs/ref/mixer.html
我還建議您訪問(wèn)此網(wǎng)站以獲取有關(guān) GPIO.RPi 模塊的更多信息
https://sourceforge.net/p/raspberry-gpio-python/wiki/Examples/
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