目录
一.对象属性
单击一个物体，我们可以看到一个对象的属性。
可能没有学过VB或者易语言的人看我这篇文章，所以我就不做对比惹。
●objectName，控件对象名称（你写代码的时候如何称呼它）
●geometry,相对坐标系（XY是相对于该庄口的位置，后面的就是这个东西的大小）
●minimumSize、maximumSize 最小最大的宽度、高度。如果想让程序不受缩放影响，那么久设置成一样的数值
●font，字体
●cursor，光标，可选
●windowTitle、text等，是用户可见的那种显示的标识
等不作过多的记述。
这只是个入门，后面他们的应用的时候会再涉及。
二.今天学到的类型
1.事件绑定（事件转移）
将一个窗口的按钮绑一个函数：
self.pushButton.clicked.connect(self.click1)2.编辑框插入
self.lineEdit.insert('0')3.编辑框置文本
self.lineEdit.setText("")4.编辑框取文本
self.lineEdit.text()三.一个计算器
我不知道怎么学了，信号槽后面再学，先做一个计算器
先绘图，布局
添加代码，运行起来：
然后，我们本来是因该新写一个类，然后继承该类，然后添加我们的新东西，可是，我不会。所以就在窗口的初始化代码里面，添加我们的函数和我们的事件绑定。
像这样：
self.pushButton.clicked.connect(self.click1)
def click1(self):
self.lineEdit.insert('1')然后，这是一个计算器的代码，可以看看：
import sys
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(358, 287)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.pushButton = QtWidgets.QPushButton(self.centralwidget)
self.pushButton.setEnabled(True)
self.pushButton.setGeometry(QtCore.QRect(50, 60, 61, 51))
self.pushButton.setObjectName("pushButton")
self.pushButton_2 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_2.setEnabled(True)
self.pushButton_2.setGeometry(QtCore.QRect(110, 60, 61, 51))
self.pushButton_2.setObjectName("pushButton_2")
self.pushButton_3 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_3.setEnabled(True)
self.pushButton_3.setGeometry(QtCore.QRect(170, 60, 61, 51))
self.pushButton_3.setObjectName("pushButton_3")
self.pushButton_4 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_4.setEnabled(True)
self.pushButton_4.setGeometry(QtCore.QRect(50, 110, 61, 51))
self.pushButton_4.setObjectName("pushButton_4")
self.pushButton_5 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_5.setEnabled(True)
self.pushButton_5.setGeometry(QtCore.QRect(110, 110, 61, 51))
self.pushButton_5.setObjectName("pushButton_5")
self.pushButton_6 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_6.setEnabled(True)
self.pushButton_6.setGeometry(QtCore.QRect(170, 110, 61, 51))
self.pushButton_6.setObjectName("pushButton_6")
self.pushButton_7 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_7.setEnabled(True)
self.pushButton_7.setGeometry(QtCore.QRect(50, 160, 61, 51))
self.pushButton_7.setObjectName("pushButton_7")
self.pushButton_8 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_8.setEnabled(True)
self.pushButton_8.setGeometry(QtCore.QRect(110, 160, 61, 51))
self.pushButton_8.setObjectName("pushButton_8")
self.pushButton_9 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_9.setEnabled(True)
self.pushButton_9.setGeometry(QtCore.QRect(170, 160, 61, 51))
self.pushButton_9.setObjectName("pushButton_9")
self.lineEdit = QtWidgets.QLineEdit(self.centralwidget)
self.lineEdit.setGeometry(QtCore.QRect(10, 20, 341, 31))
self.lineEdit.setText("")
self.lineEdit.setMaxLength(99999999)
self.lineEdit.setObjectName("lineEdit")
self.pushButton_10 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_10.setEnabled(True)
self.pushButton_10.setGeometry(QtCore.QRect(230, 60, 61, 51))
self.pushButton_10.setObjectName("pushButton_10")
self.pushButton_11 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_11.setEnabled(True)
self.pushButton_11.setGeometry(QtCore.QRect(230, 110, 61, 51))
self.pushButton_11.setObjectName("pushButton_11")
self.pushButton_12 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_12.setEnabled(True)
self.pushButton_12.setGeometry(QtCore.QRect(230, 160, 61, 51))
self.pushButton_12.setObjectName("pushButton_12")
self.pushButton_13 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_13.setEnabled(True)
self.pushButton_13.setGeometry(QtCore.QRect(230, 210, 61, 51))
self.pushButton_13.setObjectName("pushButton_13")
self.pushButton_14 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_14.setEnabled(True)
self.pushButton_14.setGeometry(QtCore.QRect(50, 210, 61, 51))
self.pushButton_14.setObjectName("pushButton_14")
self.pushButton_15 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_15.setEnabled(True)
self.pushButton_15.setGeometry(QtCore.QRect(170, 210, 61, 51))
self.pushButton_15.setObjectName("pushButton_15")
self.pushButton_16 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_16.setEnabled(True)
self.pushButton_16.setGeometry(QtCore.QRect(110, 210, 61, 51))
self.pushButton_16.setObjectName("pushButton_16")
MainWindow.setCentralWidget(self.centralwidget)
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", "这是测试计算器"))
self.pushButton.setText(_translate("MainWindow", "1"))
self.pushButton_2.setText(_translate("MainWindow", "2"))
self.pushButton_3.setText(_translate("MainWindow", "3"))
self.pushButton_4.setText(_translate("MainWindow", "4"))
self.pushButton_5.setText(_translate("MainWindow", "5"))
self.pushButton_6.setText(_translate("MainWindow", "6"))
self.pushButton_7.setText(_translate("MainWindow", "7"))
self.pushButton_8.setText(_translate("MainWindow", "8"))
self.pushButton_9.setText(_translate("MainWindow", "9"))
self.pushButton_10.setText(_translate("MainWindow", "+"))
self.pushButton_11.setText(_translate("MainWindow", "-"))
self.pushButton_12.setText(_translate("MainWindow", "×"))
self.pushButton_13.setText(_translate("MainWindow", "÷"))
self.pushButton_14.setText(_translate("MainWindow", "←"))
self.pushButton_15.setText(_translate("MainWindow", "="))
self.pushButton_16.setText(_translate("MainWindow", "0"))
self.pushButton.clicked.connect(self.click1)
self.pushButton_2.clicked.connect(self.click2)
self.pushButton_3.clicked.connect(self.click3)
self.pushButton_4.clicked.connect(self.click4)
self.pushButton_5.clicked.connect(self.click5)
self.pushButton_6.clicked.connect(self.click6)
self.pushButton_7.clicked.connect(self.click7)
self.pushButton_8.clicked.connect(self.click8)
self.pushButton_9.clicked.connect(self.click9)
self.pushButton_16.clicked.connect(self.click0)
self.pushButton_10.clicked.connect(self.clickp)
self.pushButton_11.clicked.connect(self.clickm)
self.pushButton_12.clicked.connect(self.clickc)
self.pushButton_13.clicked.connect(self.clickd)
self.pushButton_14.clicked.connect(self.clickclear)
self.pushButton_15.clicked.connect(self.clicke)
def click0(self):
self.lineEdit.insert('0')
def click1(self):
self.lineEdit.insert('1')
def click2(self):
self.lineEdit.insert('2')
def click3(self):
self.lineEdit.insert('3')
def click4(self):
self.lineEdit.insert('4')
def click5(self):
self.lineEdit.insert('5')
def click6(self):
self.lineEdit.insert('6')
def click7(self):
self.lineEdit.insert('7')
def click8(self):
self.lineEdit.insert('8')
def click9(self):
self.lineEdit.insert('9')
def clickp(self):
self.lineEdit.insert('+')
def clickm(self):
self.lineEdit.insert('-')
def clickc(self):
self.lineEdit.insert('*')
def clickd(self):
self.lineEdit.insert('/')
def clickclear(self):
self.lineEdit.setText("")
def clicke(self):
print(eval(self.lineEdit.text()))
text = self.lineEdit.text()
self.lineEdit.setText('%s= %.2f' % (text, eval(text)))
if __name__ == '__main__':
app = QtWidgets.QApplication(sys.argv) # 创建一个QApplication，也就是你要开发的软件app
MainWindow = QtWidgets.QMainWindow() # 创建一个QMainWindow，用来装载你需要的各种组件、控件
ui = Ui_MainWindow() # ui是Ui_MainWindow()类的实例化对象，Ui_MainWindow需要根据你的实例化对象的objectname，默认是MainWindow。
ui.setupUi(MainWindow) # 执行类中的setupUi方法，方法的参数是第二步中创建的QMainWindow
MainWindow.show() # 执行QMainWindow的show()方法，显示这个QMainWindow
sys.exit(app.exec_()) # 使用exit()或者点击关闭按钮退出QApp这个要多靠积累，积累对象的操作函数，说白了就是靠背。
