python 按钮点击关闭窗口的实现

1、简介

1)使用 python 创建主窗口

2)设置标题栏图标,文字

3)设置状态栏图标文字

4)将窗口移动到屏幕中间

2、功能实现

1) QtDesign 实现

就是 先画 ui 然后转python

# -*- coding: utf-8 -*-

# Form implementation generated from reading ui file 'untitled.ui'

#

# Created by: PyQt5 UI code generator 5.11.3

#

# WARNING! All changes made in this file will be lost!

import sys

from PyQt5 import QtCore, QtGui, QtWidgets

from PyQt5.QtWidgets import QApplication

class Ui_MainWindow(object):

def setupUi(self, MainWindow):

MainWindow.setObjectName("MainWindow")

MainWindow.resize(800, 600) # 设置窗口大小

self.centralwidget = QtWidgets.QWidget(MainWindow)

self.centralwidget.setObjectName("centralwidget")

self.verticalLayoutWidget = QtWidgets.QWidget(self.centralwidget)

self.verticalLayoutWidget.setGeometry(QtCore.QRect(20, 20, 100, 60)) #设置 按钮位置大小

self.verticalLayoutWidget.setObjectName("verticalLayoutWidget")

self.verticalLayout = QtWidgets.QVBoxLayout(self.verticalLayoutWidget)

self.verticalLayout.setContentsMargins(0, 0, 0, 0)

self.verticalLayout.setObjectName("verticalLayout")

self.pushButton = QtWidgets.QPushButton(self.verticalLayoutWidget)

self.pushButton.setObjectName("pushButton")

self.pushButton.clicked.connect(self.onButtonClick) #绑定按键点击事件

self.verticalLayout.addWidget(self.pushButton)

MainWindow.setCentralWidget(self.centralwidget)

self.menubar = QtWidgets.QMenuBar(MainWindow)

self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 23))

self.menubar.setObjectName("menubar")

MainWindow.setMenuBar(self.menubar)

self.statusbar = QtWidgets.QStatusBar(MainWindow)

self.statusbar.setObjectName("statusbar")

MainWindow.setStatusBar(self.statusbar)

self.retranslateUi(MainWindow)

QtCore.QMetaObject.connectSlotsByName(MainWindow)

def retranslateUi(self, MainWindow):

_translate = QtCore.QCoreApplication.translate

MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))

self.pushButton.setText(_translate("MainWindow", "关闭窗口")) # 设置按钮文字

def onButtonClick(self):

# sender 是发送信号的对象,此处发送信号的对象是button1按钮

sender = self.sender()

print(sender.text() + ' 被按下了')

qApp = QApplication.instance()

qApp.quit() # 关闭窗口

if __name__ == '__main__':

app = QtWidgets.QApplication(sys.argv)

MainWindow = QtWidgets.QMainWindow()

ui = Ui_MainWindow()

ui.setupUi(MainWindow)

MainWindow.show()

sys.exit(app.exec_())

可以设置 按钮位置和大小,但是速度有点慢

2)使用 python 直接写出来

速度快一些,但是还没有掌握怎么设置按钮大小和位置··

# -*- coding: utf-8 -*-

'''

【简介】

PyQT5中主窗口例子

'''

import sys

from PyQt5.QtWidgets import QMainWindow , QApplication, QDesktopWidget,QPushButton,QHBoxLayout,QWidget

from PyQt5.QtGui import QIcon

class MainWidget(QMainWindow):

def __init__(self,parent=None):

super(MainWidget,self).__init__(parent)

# 设置主窗体标签

self.setWindowTitle("QMainWindow 例子") #设置主窗口文字

self.resize(400, 200) #设置主窗口大小

self.status = self.statusBar() #获取主窗口状态栏

self.status.showMessage("这是状态栏提示",5000) #设置主窗口状态栏文字

self.center() # 调用将窗口设置中间函数

self.button1 = QPushButton('关闭主窗口') #实例化一个 按键

self.button1.setStyleSheet("background-color: red") # 设置按钮的风格和颜色

self.button1.clicked.connect(self.onButtonClick) #绑定按键点击事件

layout = QHBoxLayout()

layout.addWidget(self.button1)

main_frame = QWidget()

main_frame.setLayout(layout)

self.setCentralWidget(main_frame)

def onButtonClick(self ):

#sender 是发送信号的对象,此处发送信号的对象是button1按钮

sender = self.sender()

print( sender.text() + ' 被按下了' )

qApp = QApplication.instance()

qApp.quit()

def center(self):

screen = QDesktopWidget().screenGeometry() # 获取当前屏幕对象

size = self.geometry() # 获取窗口尺寸数据

self.move((screen.width() - size.width()) / 2, (screen.height() - size.height()) / 2) # 根据屏幕尺寸 和 窗口尺寸计算 相应位置

if __name__ == "__main__":

app = QApplication(sys.argv)

app.setWindowIcon(QIcon("./images/cartoon1.ico")) #设置主窗口的图标

main = MainWidget() #获取主窗口对象

main.show()

sys.exit(app.exec_())

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