mac install PyQt5

1. install brew

/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

2. install python3

brew install python3 brew info python3python3 -V

3. install sip & pyqt5

pip3 install sip
pip3 install pyqt

simple.py

import sys
from PyQt5.QtWidgets import QMainWindow, QTextEdit, QApplication, qApp, QAction
from PyQt5.QtGui import QIcon

class simple(QMainWindow):

    def __init__(self):
        super().__init__()
        self.initUI()

    def initUI(self):
        self.setWindowTitle(‘hello‘)
        self.setObjectName("helloWin")
        self.resize(500, 300)

if __name__ == ‘__main__‘:
    app = QApplication(sys.argv)
    ex = simple()
    ex.show()
    sys.exit(app.exec_())

simple2.py

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

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

class FirstWindow(QWidget):

    signal = pyqtSignal(str)
    def __init__(self, parent=None):
        # super这个用法是调用父类的构造函数
        # parent=None表示默认没有父Widget，如果指定父亲Widget，则调用之
        super(FirstWindow, self).__init__(parent)
        self.resize(100, 100)
        self.btn = QToolButton(self)
        self.btn.setText("click")
        self.signal.connect(self.sinCall)

    def sinCall(self, text):
        print("sin emit:", text)
        self.btn.setText(text)

    def closeEvent(self, event):
        result = QMessageBox.question(self,
                      "Confirm Exit...",
                      "Are you sure you want to exit ?",
                      QMessageBox.Yes| QMessageBox.No)
        event.ignore()

        if result == QMessageBox.Yes:
         event.accept()

class SecondWindow(QWidget):
    def __init__(self, parent=None):
        super(SecondWindow, self).__init__(parent)
        self.resize(200, 200)
        self.setStyleSheet("background: black")        

    def handle_click(self):
        if not self.isVisible():
            self.show()

    def handle_close(self):
        self.close()

if __name__ == "__main__":
    App = QApplication(sys.argv)
    ex = FirstWindow()
    s = SecondWindow()
    ex.btn.clicked.connect(s.handle_click)
    #ex.btn.clicked.connect(ex.hide)
    ex.signal.emit("signal text")
    ex.show()
    sys.exit(App.exec_())

4. install Qt (可选， 方便做界面，类似winform做界面用: 界面可视化工具，可以很方便的设计UI，所见即所得)
　　a. install xcode
　　b. download Qt https://www.qt.io/download/ 

5. install pycharm(可选， IDE， 方便开发： 可集成Qt； Qt的ui文件转py； 直接运行python)
　　a. 配置Qt Designer:   Qt的界面可视化工具，可以很方便的设计UI，所见即所得

1. 打开 PyCharm 的设置
2. 找到 Tools -> External Tools
3. 点击 + -> Create Tool
   
   
   
   　　b. 配置PyUIC:   这个工具可以把Qt Designer的UI文件，转换成Py文件

   python -m PyQt5.uic.pyuic $FileName$ -o $FileNameWithoutExtension$.py

   

   c. 右键菜单中选择 External Tools 即可        

6.install pyinstaller (可选， python转可执行文件：exe， pkg）)

pip3 install pyinstaller
pyinstaller -F -w {PyFile}.py