python_Qtimer学习_python qtimer

from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
import sys
from datetime import datetime
 
class WinTimer(QWidget):
    def __init__(self,parent=None):
        super(WinTimer,self).__init__(parent)
 
        ###界面显示
        self.label_start=QLabel("开始时间:")
        self.label_curr=QLabel("当前时间:")
        self.label_total=QLabel("时间总计:")
        self.startBtn=QPushButton("开始")
        self.endBtn=QPushButton("停止")
        self.endBtn.setEnabled(False)
 
        ##时间变量
        self.start_time=QDateTime.currentDateTime()
        self.stop_time = QDateTime.currentDateTime()
 
        ###定时器
        self.timer=QTimer()
        self.timer.timeout.connect(self.currTime)
 
        layout=QGridLayout()
        layout.addWidget(self.label_start,0,0,1,2)
        layout.addWidget(self.label_curr, 1,0,1,2)
        layout.addWidget(self.label_total, 2,0,1,2)
        layout.addWidget(