pythonmain.exe上有按钮

水平有限，欢迎建议和挑错

PyQt5中按钮是一个QpushButton，可以提供一个点击的按钮来触发摸一个事件。

按钮可以显示图片或者文字。

创建按钮

我们在第一节的mainwindow上创建一个按钮，代码如下：

from PyQt5 import QtCore, QtGui, QtWidgets

from PyQt5.QtGui import QIcon

class Ui_mainWindow(object):

def setupUi(self, mainWindow):

mainWindow.setObjectName("mainWindow")

mainWindow.setWindowModality(QtCore.Qt.WindowModal)

mainWindow.resize(624, 511)

self.centralWidget = QtWidgets.QWidget(mainWindow)

self.centralWidget.setObjectName("centralWidget")

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

self.pushButton.setGeometry(QtCore.QRect(240, 240, 75, 23))

self.pushButton.setObjectName("pushButton")

mainWindow.setCentralWidget(self.centralWidget)

self.retranslateUi(mainWindow)

QtCore.QMetaObject.connectSlotsByName(mainWindow)

def retranslateUi(self, mainWindow):

_translate = QtCore.QCoreApplication.translate

mainWindow.setWindowTitle('您好')

mainWindow.setWindowIcon(QIcon('logo.png'))

if __name__ == "__main__":

import sys

app = QtWidgets.QApplication(sys.argv)

mainWindow = QtWidgets.QMainWindow()

ui = Ui_mainWindow()

ui.setupUi(mainWindow)

mainWindow.show()

sys.exit(app.exec_())

image

这里只是单单创建一个按钮，按钮点击并没有任何作用。

同样按钮也可以进行各种设置。

image

除了上图几种方法，再介绍另外几种方法。

(1)设置字体大小，加粗，字型

font = QtGui.QFont()

font.setFamily('微软雅黑')

font.setBold(True)

font.setPointSize(13)

font.setWeight(75)

self.pushButton.setFont(font)

这个方法是通用的。几乎PyQt其他组件也能用。

image

(2)设置图片

icon = QtGui.QIcon()

icon.addPixmap(QtGui.QPixmap("logo.png"), QtGui.QIcon.Normal, QtGui.QIcon.Off)

self.pushButton.setIcon(icon)

self.pushButton.setIconSize(QtCore.QSize(50, 80))

self.pushButton.setAutoRepeatDelay(200)

image

无图代码

from PyQt5 import QtCore, QtGui, QtWidgets

from PyQt5.QtGui import QIcon

class Ui_mainWindow(object):

def setupUi(self, mainWindow):

mainWindow.setObjectName("mainWindow")

mainWindow.setWindowModality(QtCore.Qt.WindowModal)

mainWindow.resize(624, 511)

self.centralWidget = QtWidgets.QWidget(mainWindow)

self.centralWidget.setObjectName("centralWidget")

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

self.pushButton.setGeometry(QtCore.QRect(240, 240,200, 53))

self.pushButton.setObjectName("pushButton")

self.pushButton.setText("一颗数据小白菜")

# self.pushButton.setFlat(True)

self.pushButton.setStyleSheet("background-color: rgb(164, 185, 255)"

"border-color: rgb(170, 150, 163)"

"font: 75 12pt \"Arial Narrow\""

"color: rgb(126, 255, 46)")

mainWindow.setCentralWidget(self.centralWidget)

self.retranslateUi(mainWindow)

QtCore.QMetaObject.connectSlotsByName(mainWindow)

def retranslateUi(self, mainWindow):

_translate = QtCore.QCoreApplication.translate

mainWindow.setWindowTitle('您好')

mainWindow.setWindowIcon(QIcon('logo.png'))

if __name__ == "__main__":

import sys

app = QtWidgets.QApplication(sys.argv)

mainWindow = QtWidgets.QMainWindow()

ui = Ui_mainWindow()

ui.setupUi(mainWindow)

mainWindow.show()

sys.exit(app.exec_())

image

有图代码

from PyQt5 import QtCore, QtGui, QtWidgets

from PyQt5.QtGui import QIcon

class Ui_mainWindow(object):

def setupUi(self, mainWindow):

mainWindow.setObjectName("mainWindow")

mainWindow.setWindowModality(QtCore.Qt.WindowModal)

mainWindow.resize(624, 511)

self.centralWidget = QtWidgets.QWidget(mainWindow)

self.centralWidget.setObjectName("centralWidget")

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

self.pushButton.setGeometry(QtCore.QRect(240, 240,200, 53))

self.pushButton.setObjectName("pushButton")

self.pushButton.setText("一颗数据小白菜")

# self.pushButton.setFlat(True)

self.pushButton.setStyleSheet("background-color: rgb(164, 185, 255)"

"border-color: rgb(170, 150, 163)"

"font: 75 12pt \"Arial Narrow\""

"color: rgb(126, 255, 46)")

icon = QtGui.QIcon()

icon.addPixmap(QtGui.QPixmap("logo.png"), QtGui.QIcon.Normal, QtGui.QIcon.Off)

self.pushButton.setIcon(icon)

self.pushButton.setIconSize(QtCore.QSize(50, 80))

self.pushButton.setAutoRepeatDelay(200)

mainWindow.setCentralWidget(self.centralWidget)

self.retranslateUi(mainWindow)

QtCore.QMetaObject.connectSlotsByName(mainWindow)

def retranslateUi(self, mainWindow):

_translate = QtCore.QCoreApplication.translate

mainWindow.setWindowTitle('您好')

mainWindow.setWindowIcon(QIcon('logo.png'))

if __name__ == "__main__":

import sys

app = QtWidgets.QApplication(sys.argv)

mainWindow = QtWidgets.QMainWindow()

ui = Ui_mainWindow()

ui.setupUi(mainWindow)

mainWindow.show()

sys.exit(app.exec_())

image

绑定按钮事件

我们给按钮绑定触发时间，用：

pushbutton.clicked.connect()

(1)退出事件

我们给按钮绑定退出事件:

self.pushButton.clicked.connect(mainWindow.close)

image

所以要先 new 一个widget然后调用:

void setCentralWidget( QWidget* widget)

例如：我们在mainwindow中添加2个控件：QLabel 和QLineEdit:

cenWidget = new QWidget(this)//this is point to QMainWindow

setCentralWidget(cenWidget)

QHBoxLayout* H = new QHBoxLayout(cenWidget)

label = new QLabel(cenWidget)

lineEdit = new QLineEdit(cenWidget)

H->addWidget(label)

H->addWidget(label)

Question2:

转载，仅供参考。

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