PyQt5-QSlider（滑动条）控件使用

 1 #QSplider（滑动条）控件的使用
 2 from PyQt5.QtWidgets import  QVBoxLayout,QWidget,QApplication ,QHBoxLayout,QSpinBox,QSlider,QLabel
 3 
 4 from PyQt5.QtGui import QIcon,QPixmap,QFont
 5 from PyQt5.QtCore import  Qt
 6 
 7 import sys
 8 
 9 class WindowClass(QWidget):
10 
11     def __init__(self,parent=None):
12 
13         super(WindowClass, self).__init__(parent)
14         layout=QVBoxLayout()
15         self.label_0 = QLabel()
16         self.label_0.setText("文本字体大小为：")
17 
18         self.label=QLabel()
19         self.label.setFont(QFont(None,20))
20 
21         self.splider=QSlider(Qt.Horizontal)
22         self.splider.valueChanged.connect(self.valChange)
23         self.splider.setMinimum(20)#最小值
24         self.splider.setMaximum(60)#最大值
25         self.splider.setSingleStep(2)#步长
26         self.splider.setTickPosition(QSlider.TicksBelow)#设置刻度位置，在下方
27         self.splider.setTickInterval(5)#设置刻度间隔
28 
29         layout.addWidget(self.splider)
30         layout.addWidget(self.label_0)
31         layout.addWidget(self.label)
32         self.resize(500,500)
33         self.setLayout(layout)
34 
35     def valChange(self):
36         print(self.splider.value())
37         self.label.setNum(self.splider.value())#注意这里别setText 会卡死
38         self.label_0.setFont(QFont("微软雅黑",self.splider.value()))
39 
40 if __name__=="__main__":
41     app=QApplication(sys.argv)
42     win=WindowClass()
43     win.show()
44     sys.exit(app.exec_())