QLabel에서 텍스트를 업데이트하는 데 문제가 있습니다.

Question

음악 플레이어를 만들고 있는데, 페이지별로 노래를 볼 수있는 섹션이 필요합니다. 페이지 전환이 작동하지만 텍스트가 업데이트되지 않습니다. 나는 googleing을 시도했지만 피팅/작동 anwser를 찾을 수 coudn't. 여기 어쨌든

1 
0 
2 
3 
n1 
n2 
1 
1 
2 
3 

을 내 코드입니다 : 그것을 원하는 사람들이 내 아이들의 말씀입니다

import sys 
import os 
import pygame 
from PyQt4 import QtGui, QtCore 
from time import sleep 

class Window(QtGui.QMainWindow): 

    def __init__(self): 
     super(Window, self).__init__() 
     self.setGeometry(50, 50, 500, 300) 
     self.setWindowTitle("Music Player Alpha") 
     AutoPlay = True 
     Song = os.listdir('/home/pi/Desktop/Muziek/') 
     Song = sorted(Song) 
     self.Song = Song 
     self.CurrentSong = 0 
     self.PageNum = 0 
     pygame.mixer.init() 
     pygame.mixer.music.load('/home/pi/Desktop/Muziek/' + Song[0]) 
     pygame.mixer.music.play() 
     self.home() 

    def home(self): 
     print("1") 
     print(self.PageNum) 
     btnQuit = QtGui.QPushButton("Quit", self) 
     btnQuit.clicked.connect(self.close) 
     btnQuit.move(400,270) 
     btnPlay = QtGui.QPushButton("Play", self) 
     btnPlay.clicked.connect(self.play) 
     btnPlay.move(100, 270) 
     btnPause = QtGui.QPushButton("Pause", self) 
     btnPause.clicked.connect(self.pause) 
     btnPause.move(200, 270) 
     btnNext = QtGui.QPushButton("Next", self) 
     btnNext.clicked.connect(self.next) 
     btnNext.move(300, 270) 
     btnPrevious = QtGui.QPushButton("Previous", self) 
     btnPrevious.clicked.connect(self.previous) 
     btnPrevious.move(0, 270) 
     btnPrevPage = QtGui.QPushButton("Prev Page", self) 
     btnPrevPage.clicked.connect(self.PrevPage) 
     btnPrevPage.move(0,160) 
     btnNextPage = QtGui.QPushButton("Next Page", self) 
     btnNextPage.clicked.connect(self.NextPage) 
     btnNextPage.move(100, 160) 
     try: 
      txtNum1 = QtGui.QLabel(self.Song[0 + 10*self.PageNum], self) 
      txtNum1.resize(500, 30) 
      txtNum2 = QtGui.QLabel(self.Song[1 + 10*self.PageNum], self) 
      txtNum2.move(0, 15) 
      txtNum2.resize(500, 30) 
      txtNum3 = QtGui.QLabel(self.Song[2 + 10*self.PageNum], self) 
      txtNum3.move(0, 30) 
      txtNum3.resize(500, 30) 
      txtNum4 = QtGui.QLabel(self.Song[3 + 10*self.PageNum], self) 
      txtNum4.move(0, 45) 
      txtNum4.resize(500, 30) 
      txtNum5 = QtGui.QLabel(self.Song[4 + 10*self.PageNum], self) 
      txtNum5.move(0, 60) 
      txtNum5.resize(500, 30) 
      txtNum6 = QtGui.QLabel(self.Song[5 + 10*self.PageNum], self) 
      txtNum6.move(0, 75) 
      txtNum6.resize(500, 30) 
      txtNum7 = QtGui.QLabel(self.Song[6 + 10*self.PageNum], self) 
      txtNum7.move(0, 90) 
      txtNum7.resize(500, 30) 
      txtNum8 = QtGui.QLabel(self.Song[7 + 10*self.PageNum], self) 
      txtNum8.move(0, 105) 
      txtNum8.resize(500, 30) 
      txtNum9 = QtGui.QLabel(self.Song[8 + 10*self.PageNum], self) 
      txtNum9.move(0, 120) 
      txtNum9.resize(500, 30) 
      txtNum10 = QtGui.QLabel(self.Song[9 + 10*self.PageNum], self) 
      txtNum10.move(0, 135) 
      txtNum10.resize(500, 30) 
      print("2") 
     except IndexError: 
      print("2.5") 
     self.show() 
     print("3") 

    def close(self): 
     sys.exit() 

    def play(self): 
     pygame.mixer.music.unpause() 

    def pause(self): 
     pygame.mixer.music.pause() 

    def next(self, event): 
     self.CurrentSong = self.CurrentSong + 1 
     if self.CurrentSong > len(self.Song) + 1: 
      self.CurrentSong = 0 
     pygame.mixer.music.load('/home/pi/Desktop/Muziek/' + self.Song[self.CurrentSong]) 
     pygame.mixer.music.play() 
     return self.CurrentSong; 

    def previous(self, event): 
     self.CurrentSong = self.CurrentSong - 1 
     if self.CurrentSong < 0: 
      self.CurrentSong = len(self.Song) -1 
     pygame.mixer.music.load('/home/pi/Desktop/Muziek/' + self.Song[self.CurrentSong]) 
     pygame.mixer.music.play() 

    def PrevPage(self, event): 
     print("p1") 
     self.PageNum = self.PageNum - 1 
     if self.PageNum < 0 : 
      print("p<0") 
      self.PageNum = 0 
     print("p2") 
     self.home() 
     return self.PageNum; 

    def NextPage(self, event): 
     print("n1") 
     self.PageNum = self.PageNum + 1 
     if self.PageNum > len(self.Song)/10: 
      print("n>0") 
     self.PageNum = self.PageNum - 1 
     print("n2") 
     self.home() 
     return self.PageNum; 

app = QtGui.QApplication(sys.argv) 
GUI = Window() 
sys.exit(app.exec_()) 

Answer 1

문제는 때마다 당신이 새로운 레이블을 만들고있는 home() 함수를 호출하는 것입니다 , 당신이해야 할 일은 단지 텍스트를 업데이트하는 것입니다.이를 위해 레이블 목록을 만듭니다. try 및 except를 사용하지 마십시오. 프로그램에 오류가있을 수 있으므로 목록의 색인이 범위 내에 있는지 확인하는 것이 좋습니다.

창을 닫을 때 창을 닫기 전에 pygame.mixer.quit()으로 사운드 리소스를 해제하는 것이 더 좋습니다.이 경우 closeEvent()을 덮어 쓰는 것이 좋습니다.

import sys 
import os 
import pygame 
from PyQt4 import QtGui, QtCore 
from time import sleep 


class Window(QtGui.QMainWindow): 
    song_per_page = 10 
    directory = '/home/pi/Desktop/Muziek/' 

    def __init__(self): 
     super(Window, self).__init__() 
     self.setGeometry(50, 50, 500, 300) 
     self.setWindowTitle("Music Player Alpha") 
     AutoPlay = True 
     Song = os.listdir(self.directory) 
     Song = sorted(Song) 
     self.Song = Song 
     self.CurrentSong = 0 
     self.PageNum = 0 
     pygame.mixer.init() 
     self.txtNums = [] 
     self.home() 
     self.song() 

    def home(self): 
     btnQuit = QtGui.QPushButton("Quit", self) 
     btnQuit.clicked.connect(self.close) 
     btnQuit.move(400, 270) 
     btnPlay = QtGui.QPushButton("Play", self) 
     btnPlay.clicked.connect(self.play) 
     btnPlay.move(100, 270) 
     btnPause = QtGui.QPushButton("Pause", self) 
     btnPause.clicked.connect(self.pause) 
     btnPause.move(200, 270) 
     btnNext = QtGui.QPushButton("Next", self) 
     btnNext.clicked.connect(self.next) 
     btnNext.move(300, 270) 
     btnPrevious = QtGui.QPushButton("Previous", self) 
     btnPrevious.clicked.connect(self.previous) 
     btnPrevious.move(0, 270) 
     btnPrevPage = QtGui.QPushButton("Prev Page", self) 
     btnPrevPage.clicked.connect(self.PrevPage) 
     btnPrevPage.move(0, 160) 
     btnNextPage = QtGui.QPushButton("Next Page", self) 
     btnNextPage.clicked.connect(self.NextPage) 
     btnNextPage.move(100, 160) 

     for i in range(self.song_per_page): 
      txtNum = QtGui.QLabel(self) 
      txtNum.resize(500, 30) 
      txtNum.move(0, 15 * i) 
      self.txtNums.append(txtNum) 
     self.updateLabels() 
     self.show() 

    def updateLabels(self): 
     print(self.CurrentSong, self.PageNum) 
     for i in range(len(self.txtNums)): 
      index = i + self.song_per_page * self.PageNum 
      self.txtNums[i].clear() 
      if index < len(self.Song): 
       self.txtNums[i].setText(self.Song[i + self.song_per_page * self.PageNum]) 

    def closeEvent(self, event): 
     pygame.mixer.quit() 
     QtGui.QMainWindow.closeEvent(self, event) 

    def play(self): 
     pygame.mixer.music.unpause() 

    def pause(self): 
     pygame.mixer.music.pause() 

    def song(self): 
     try: 
      pygame.mixer.music.load(self.directory + self.Song[self.CurrentSong]) 
      pygame.mixer.music.play() 
     except pygame.error: 
      print("Module format not recognized") 

     self.updateLabels() 

    def next(self, event): 
     self.CurrentSong = (self.CurrentSong + 1) % len(self.Song) 
     self.song() 

    def previous(self, event): 
     self.CurrentSong = (self.CurrentSong - 1) % len(self.Song) 
     self.song() 

    def PrevPage(self, event): 
     self.PageNum = self.PageNum - 1 
     if self.PageNum < 0: 
      self.PageNum = 0 
     self.updateLabels() 

    def NextPage(self, event): 
     if self.song_per_page * (self.PageNum + 1) - 1 < len(self.Song): 
      self.PageNum = self.PageNum + 1 
     self.updateLabels() 


app = QtGui.QApplication(sys.argv) 
GUI = Window() 
sys.exit(app.exec_())