如何在多次添加后删除QLabel。

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英文:

Pyqt5 how can I remove Qlabel after adding them several times

问题

我正在尝试制作一款卡片游戏。在进行了1局游戏后，我需要清除QLabel以开始新游戏。以下是我正在调试的摘要。

我想使用QPushButton操作来清除所有的QLabel。但实际上我只能移除最后一个QLabel。其余的QLabel仍然保留。

我如何移除所有的QLabel？

  1. class Main(QMainWindow):
  2.     
  3.     def __init__(self):
  4.         super().__init__()
  5.         
  6.         # 整体布局
  7.         layout = QVBoxLayout()
  8.         self.setStyleSheet("background-color:white")                
  9.         self.card_layout6 = QHBoxLayout()   
  10.         
  11.         self.card_w6 = QLabel() 
  12.         self.card_w6.setPixmap(QPixmap("card.bmp"))
  13.         self.card_layout6.addWidget(self.card_w6)
  14.         layout.addLayout(self.card_layout6)
  15.         
  16.         bt1_layout = QtWidgets.QGridLayout()
  17.         bt1_layout.setContentsMargins(0,0,0,20)
  18.         layout.addLayout(bt1_layout)
  19.         self.setGeometry(500, 100, 330, 200)  
  20.         
  21.         height = 800
  22.         width = 800
  23.         self.setFixedHeight(height)
  24.         self.setFixedWidth(width)
  25.         
  26.         self.request_bt = QPushButton("添加卡片")
  27.         self.request_bt.setStyleSheet("background-color:lightblue")        
  28.         self.request_bt.clicked.connect(self.add_card_layout6)
  29.         bt1_layout.addWidget(self.request_bt,0,0)
  30.         
  31.         # 用于卡片移除的PushButton
  32.         remove_bt = QPushButton("移除卡片")
  33.         remove_bt.setStyleSheet("background-color:pink")        
  34.         bt1_layout.addWidget(remove_bt,3,0)
  35.         remove_bt.clicked.connect(self.card_removal)
  36.         
  37.         # 整体布局        
  38.         self.container = QWidget()
  39.         self.container.setLayout(layout)
  40.         self.setCentralWidget(self.container)       
  41.         self.show()
  42.         
  43.     def add_card_layout6(self):  
  44.         global card_w6
  45.         self.card_w6 = QLabel() 
  46.         self.card_w6.setPixmap(QPixmap("card.bmp"))
  47.         self.card_layout6.addWidget(self.card_w6)
  48.      
  49.     def card_removal(self):
  50.          self.card_w6.clear()

注意：我已经移除了HTML实体编码（如"）以及修复了self.card_w6的全局引用。

英文:

I am trying to make a card game. After 1 game, I need to clear QLabel to start new game.
Following is the summery that I am debugging.

I want to clear all QLabel with QPushButton operation. But actually I could remove only the last Qlabel. Rest of QLabel still stay.
How Can I remove all QLabel?

  1. class Main(QMainWindow):
  2.     
  3.     def __init__(self):
  4.         super().__init__()
  5.         
  6.         #overall layout
  7.         layout = QVBoxLayout()
  8.         self.setStyleSheet("background-color:white")                
  9.         self.card_layout6 = QHBoxLayout()   
  10.         
  11.         self.card_w6 = QLabel() 
  12.         self.card_w6.setPixmap(QPixmap("card.bmp"))
  13.         self.card_layout6.addWidget(self.card_w6)
  14.         layout.addLayout(self.card_layout6)
  15.         
  16.         bt1_layout = QtWidgets.QGridLayout()
  17.         bt1_layout.setContentsMargins(0,0,0,20)
  18.         layout.addLayout(bt1_layout)
  19.         self.setGeometry(500, 100, 330, 200)  
  20.         
  21.         height = 800
  22.         width = 800
  23.         self.setFixedHeight(height)
  24.         self.setFixedWidth(width)
  25.         
  26.         self.request_bt = QPushButton("add card")
  27.         self.request_bt.setStyleSheet("background-color:lightblue")        
  28.         self.request_bt.clicked.connect(self.add_card_layout6)
  29.         bt1_layout.addWidget(self.request_bt,0,0)
  30.         
  31.         
  32.         # Pushbutton for card removal 
  33.         remove_bt = QPushButton("card reomve")
  34.         remove_bt.setStyleSheet("background-color:pink")        
  35.         bt1_layout.addWidget(remove_bt,3,0)
  36.         remove_bt.clicked.connect(self.card_removal)
  37.         
  38.         #overall layout        
  39.         self.container = QWidget()
  40.         self.container.setLayout(layout)
  41.         self.setCentralWidget(self.container)       
  42.         self.show()
  43.         
  44.     def add_card_layout6(self):  
  45.         global card_w6
  46.         self.card_w6 = QLabel() 
  47.         self.card_w6.setPixmap(QPixmap("card.bmp"))
  48.         self.card_layout6.addWidget(self.card_w6)
  49.      
  50.     def card_removal(self):
  51.          self.card_w6.clear()
  52.

答案1

得分: -1

创建一个名为self.cards的QLabels列表，如下所示：self.cards = []，然后将self.cards.append(card_w6)添加到其中。

> QObject::deleteLater()
>安排此对象进行删除。
>当控制返回到事件循环时，对象将被删除。

  1. import sys
  2. from PyQt5 import QtCore, QtGui, QtWidgets
  3. from PyQt5.Qt import *
  5. class Main(QMainWindow):
  6.     def __init__(self):
  7.         super().__init__()
  9.         self.container = QWidget()
  10.         self.setCentralWidget(self.container)
  11.         self.setStyleSheet("background-color: blue")
  13.         self.card_w6 = QLabel()
  14.         self.card_w6.setPixmap(QPixmap("lena.jpg").scaled(200, 200))
  16.         self.card_layout6 = QGridLayout()
  17.         self.card_layout6.addWidget(self.card_w6, 0, 0)
  18.         self.card_layout6.setColumnStretch(33, 1)
  20.         layout = QVBoxLayout(self.container)
  21.         layout.addLayout(self.card_layout6)
  23.         bt1_layout = QtWidgets.QGridLayout()
  24.         bt1_layout.setContentsMargins(0, 0, 0, 20)
  25.         layout.addLayout(bt1_layout)
  27.         self.request_bt = QPushButton("add card")
  28.         self.request_bt.setStyleSheet("background-color:lightblue")
  29.         self.request_bt.clicked.connect(self.add_card_layout6)
  30.         bt1_layout.addWidget(self.request_bt, 0, 0)
  32.         # 用于卡片移除的按钮  调试目的
  33.         remove_bt = QPushButton("card remove")
  34.         remove_bt.setStyleSheet("background-color:pink")
  35.         bt1_layout.addWidget(remove_bt, 3, 0)
  36.         remove_bt.clicked.connect(self.card_removal)
  38.         self.cards = []  # +++
  39.         self.i = 1  # +++
  41.     def add_card_layout6(self):
  42.         # ?      global card_w6
  43.         card_w6 = QLabel()
  44.         card_w6.setPixmap(QPixmap("Ok.png").scaled(135, 170))
  46.         self.card_layout6.addWidget(card_w6, 0, self.i)
  47.         self.i += 1
  48.         self.cards.append(card_w6)
  50.     def card_removal(self):
  51.         #        self.card_w6.clear()
  53.         for card in self.cards:  # +++
  54.             card.deleteLater()  # +++
  55.         self.cards = []  # +++
  56.         self.i = 1
  59. if __name__ == "__main__":
  60.     app = QApplication(sys.argv)
  61.     window = Main()
  62.     window.resize(800, 600)
  63.     window.show()
  64.     sys.exit(app.exec())

如何在多次添加后删除QLabel。

英文:

Create a list of your QLabels like self.cards = [] and add self.cards.append(card_w6) to it.

> QObject::deleteLater()
>Schedules this object for deletion.
>The object will be deleted when control returns to the event loop.

  1. import sys
  2. from PyQt5 import QtCore, QtGui, QtWidgets
  3. from PyQt5.Qt import *
  4. class Main(QMainWindow):
  5. def __init__(self):
  6. super().__init__()
  7. self.container = QWidget()
  8. self.setCentralWidget(self.container)    
  9. self.setStyleSheet("background-color: blue") 
  10. self.card_w6 = QLabel() 
  11. self.card_w6.setPixmap(QPixmap("lena.jpg").scaled(200, 200))
  12. self.card_layout6 = QGridLayout()                           # + QGridLayout
  13. self.card_layout6.addWidget(self.card_w6, 0, 0)
  14. self.card_layout6.setColumnStretch(33, 1)                   # +
  15. layout = QVBoxLayout(self.container)
  16. layout.addLayout(self.card_layout6)
  17. bt1_layout = QtWidgets.QGridLayout()
  18. bt1_layout.setContentsMargins(0, 0, 0, 20)
  19. layout.addLayout(bt1_layout)
  20. self.request_bt = QPushButton("add card")
  21. self.request_bt.setStyleSheet("background-color:lightblue")        
  22. self.request_bt.clicked.connect(self.add_card_layout6)
  23. bt1_layout.addWidget(self.request_bt, 0, 0)
  24. # Pushbutton for card removal  ####debugging purpose        
  25. remove_bt = QPushButton("card reomve")
  26. remove_bt.setStyleSheet("background-color:pink")        
  27. bt1_layout.addWidget(remove_bt, 3, 0)
  28. remove_bt.clicked.connect(self.card_removal)
  29. self.cards = []                                              # +++
  30. self.i = 1                                                   # +++
  31. def add_card_layout6(self):  
  32. # ?      global card_w6
  33. card_w6 = QLabel() 
  34. card_w6.setPixmap(QPixmap("Ok.png").scaled(135, 170))
  35. self.card_layout6.addWidget(card_w6, 0, self.i)               # +
  36. self.i += 1                                                   # +
  37. self.cards.append(card_w6)                                    # +
  38. def card_removal(self):
  39. #        self.card_w6.clear()
  40. for card in self.cards:                                       # +++
  41. card.deleteLater()                                        # +++
  42. self.cards = []                                               # +++
  43. self.i = 1
  44. if __name__ == "__main__":
  45. app = QApplication(sys.argv)
  46. window = Main()
  47. window.resize(800, 600)
  48. window.show()
  49. sys.exit(app.exec())

如何在多次添加后删除QLabel。

huangapple
  • 本文由 发表于 2023年6月11日 21:32:24
  • 转载请务必保留本文链接：https://go.coder-hub.com/76450711.html
  • deletelater
  • pyqt
  • pyqt5
  • python
  • qlabel
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