PyQt5使用QTimer实现电子时钟

class MyTimer(QWidget):
  def __init__(self, parent = None):  
    # ......
    
    #新建一个QTimer对象    
    self.timer = QTimer()   
    self.timer.setInterval(1000)    
    self.timer.start()
     
    # 信号连接到槽    
    self.timer.timeout.connect(self.onTimerOut)

  # 定义槽
  def onTimerOut(self):    
    self.lcd.display(time.strftime("%X",time.localtime()))

import sys
import time
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *

class MyTimer(QWidget):
  def __init__(self, parent = None):
    super(MyTimer, self).__init__(parent)   
    self.resize(200, 100)   
    self.setWindowTitle("QTimerDemo")
    
    self.lcd = QLCDNumber()   
    self.lcd.setDigitCount(10)   
    self.lcd.setMode(QLCDNumber.Dec)
    self.lcd.setSegmentStyle(QLCDNumber.Flat)
    self.lcd.display(time.strftime("%X",time.localtime()))

    layout = QVBoxLayout()
    layout.addWidget(self.lcd)    
    self.setLayout(layout)
    
    #新建一个QTimer对象    
    self.timer = QTimer()   
    self.timer.setInterval(1000)    
    self.timer.start()
     
    # 信号连接到槽    
    self.timer.timeout.connect(self.onTimerOut)

  # 定义槽
  def onTimerOut(self):    
    self.lcd.display(time.strftime("%X",time.localtime()))


    
app = QApplication(sys.argv)
t = MyTimer()
t.show()
sys.exit(app.exec_())

class MyTimer(QWidget):
  def __init__(self, parent = None):
    # ......
    
    #新建一个QTimer对象    
    self.timer = QBasicTimer() # QTimer()貌似不行，不知何故？
    self.timer.start(1000, self) 
  
  # 覆写计时器事件处理函数timerEvent()
  def timerEvent(self, event):
    self.lcd.display(time.strftime("%X",time.localtime()))

import sys
import time
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *

class MyTimer(QWidget):
  def __init__(self, parent = None):
    super(MyTimer, self).__init__(parent)   
    self.resize(200, 100)   
    self.setWindowTitle("QTimerDemo")
    
    self.lcd = QLCDNumber()   
    self.lcd.setDigitCount(10)   
    self.lcd.setMode(QLCDNumber.Dec)
    self.lcd.setSegmentStyle(QLCDNumber.Flat)
    self.lcd.display(time.strftime("%X",time.localtime()))

    layout = QVBoxLayout()
    layout.addWidget(self.lcd)    
    self.setLayout(layout)
    
    #新建一个QTimer对象    
    self.timer = QBasicTimer() # QTimer()貌似不行，不知何故？
    self.timer.start(1000, self) 
  
  # 覆写计时器事件处理函数timerEvent()
  def timerEvent(self, event):
    if event.timerId() == self.timer.timerId():
      self.lcd.display(time.strftime("%X",time.localtime()))
    else:
      super(WigglyWidget, self).timerEvent(event)

    
app = QApplication(sys.argv)
t = MyTimer()
t.show()
sys.exit(app.exec_())