import sys
from PyQt5.Qt import *
class CLabel(QLabel):
def sizeHint(self):
return QSize(200, 200)
def minimumSizeHint(self):
return QSize(100, 100)
class Window(QWidget):
def __init__(self):
super().__init__()
self.setup_ui()
def setup_ui(self):
self.setWindowTitle("Qt桌面应用程序")
self.resize(400, 400)
self.label_1 = QLabel()
self.label_1.setText("标签1")
self.label_1.setStyleSheet("background-color:CornflowerBlue")
self.label_2 = QLabel()
self.label_2.setText("标签2")
self.label_2.setStyleSheet("background-color:DarkSeaGreen")
self.label_3 = QLabel()
self.label_3.setText("标签3")
self.label_3.setStyleSheet("background-color:HotPink")
self.label_4 = QLabel()
self.label_4.setText("标签4")
self.label_4.setStyleSheet("background-color:CornflowerBlue")
self.label_5 = QLabel()
self.label_5.setText("标签5")
self.label_5.setStyleSheet("background-color:DarkSeaGreen")
self.label_6 = QLabel()
self.label_6.setText("标签6")
self.label_6.setStyleSheet("background-color:HotPink")
self.box_layout_1 = QBoxLayout(QBoxLayout.TopToBottom)
self.box_layout_1.addWidget(self.label_1)
self.box_layout_1.addWidget(self.label_2)
self.box_layout_1.addWidget(self.label_3)
self.setLayout(self.box_layout_1)
self.button_1 = QPushButton()
self.button_1.setText("B")
self.box_layout_1.addWidget(self.button_1)
def button_clicked():
# self.box_layout_1.removeWidget(self.label_1)
# self.label_1 = CLabel()
# self.label_1.setText("标签1")
# self.label_1.setStyleSheet("background-color:CornflowerBlue")
# self.box_layout_1.insertWidget(0, self.label_1)
# self.label_1.setSizePolicy(QSizePolicy.Fixed,QSizePolicy.Fixed)
# self.label_1.setSizePolicy(QSizePolicy.Minimum,QSizePolicy.Minimum)
# self.label_1.setSizePolicy(QSizePolicy.Maximum,QSizePolicy.Maximum)
# self.label_1.setSizePolicy(QSizePolicy.Preferred,QSizePolicy.Preferred)
# self.label_1.setSizePolicy(QSizePolicy.Expanding,QSizePolicy.Expanding)
# self.label_1.setSizePolicy(QSizePolicy.MinimumExpanding,QSizePolicy.MinimumExpanding)
# self.label_1.setSizePolicy(QSizePolicy.Ignored,QSizePolicy.Ignored)
self.size_policy = QSizePolicy()
self.size_policy.setRetainSizeWhenHidden(True)
# QSizePolicy设置Ignored后，控件最小可以消失
self.size_policy.setVerticalPolicy(QSizePolicy.Ignored)
self.size_policy.setHorizontalPolicy(QSizePolicy.Ignored)
self.label_1.setSizePolicy(self.size_policy)
self.label_1.hide()
self.button_1.clicked.connect(button_clicked)
if __name__ == '__main__':
app = QApplication(sys.argv)
window = Window()
window.show()
sys.exit(app.exec_())
