14. 资源文件的使用

# 自定义的信号类必须是Qobject类的子类
# 使用PyQt5.QtCore.pyqtSignal()为一个类定义新的信号
# pyqtSignal()
# 信号定义为类属性
# connect()关联槽函数，disconnect()断开关联，emit()发射信号

import sys
from PyQt5.QtCore import QObject, pyqtSlot, pyqtSignal


class Human(QObject):
    # 定义一个带str类型的信号
    nameChanged = pyqtSignal(str)
    # overload型信号有两种参数，int和str
    ageChanged = pyqtSignal([int],[str])

    def __init__(self,name=‘mike‘,age=10,parent=None):
        super().__init__(parent)
        self.setAge(age)
        self.setName(name)

    def setAge(self,age):
        self.__age = age
        self.ageChanged.emit(self.__age)    #发射int参数信号
        if age<=18:
            ageInfo = ‘你是少年‘
        elif 18<age<=35:
            ageInfo = ‘你是年轻人‘
        elif 35<age<=55:
            ageInfo = ‘你是中年人‘
        elif 55<age<=85:
            ageInfo = ‘你是老年人‘
        elif age>85:
            ageInfo = ‘你是老寿星‘
        self.ageChanged[str].emit(ageInfo)      # 发射str参数信号

    def setName(self,name):
        self.__name = name
        self.nameChanged.emit(self.__name)


class Responsor(QObject):
    @pyqtSlot(int)
    def do_ageChanged_int(self,age):
        print(‘你的年龄是：‘,str(age))

    @pyqtSlot(str)
    def do_ageChanged_str(self,ageInfo):
        print(ageInfo)

    @pyqtSlot(str)
    def do_nameChanged(self,name):
        print(‘Hello‘,name)


if __name__ == ‘__main__‘:
    print(‘创建对象时：‘)
    boy = Human(‘Boy‘, 16)
    res = Responsor()
    # 信号关联槽
    boy.nameChanged.connect(res.do_nameChanged)
    # overload信号，两个槽函数不能同名，关联时需要给信号加参数区分
    boy.ageChanged.connect(res.do_ageChanged_int)
    boy.ageChanged[str].connect(res.do_ageChanged_str)

    print(‘建立关联：‘)
    boy.setAge(35)      # 发射两个ageChanged信号
    boy.setName(‘lily‘) # 发射nameChanged信号

    # 断开关联
    boy.ageChanged[str].disconnect(res.do_ageChanged_str)
    print(‘断开关联：‘)

    boy.setAge(20)  # 发射两个ageChanged信号
    boy.setName(‘lucy‘)

import sys
from PyQt5.QtWidgets import QApplication, QWidget
from PyQt5.QtCore import pyqtSlot
from PyQt5.QtGui import QIcon

from ui_Widget import Ui_Widget
from human import Human


class QmyWidget(QWidget):
    def __init__(self,parent=None):
        super().__init__(parent)
        self.ui = Ui_Widget()         # 构建UI对象
        self.ui.setupUi(self)       # 构造UI

        self.boy = Human(‘boy‘, 16)
        self.boy.nameChanged.connect(self.do_nameChanged)
        self.boy.ageChanged.connect(self.do_ageChanged_int)
        self.boy.ageChanged[str].connect(self.do_ageChanged_str)

    # 由connectSlotsByName() 自动与组件的信号关联的槽函数
    def on_sliderSetAge_valueChanged(self, value):
        self.boy.setAge(value)

    def on_btnSetName_clicked(self):
        hisName = self.ui.editNameInput.text()
        self.boy.setName(hisName)

    # 自定义槽函数
    def do_nameChanged(self,name):
        self.ui.editNameHello.setText(‘Hello，‘+name)

    @pyqtSlot(int)
    def do_ageChanged_int(self,age):
        self.ui.editAgeInt.setText(str(age))

    @pyqtSlot(str)
    def do_ageChanged_str(self,info):
        self.ui.editAgeStr.setText(info)


if __name__ == ‘__main__‘:
    app = QApplication(sys.argv)

    icon = QIcon(":/icons/images/app.ico")
    app.setWindowIcon(icon)

    form = QmyWidget()
    form.show()
    sys.exit(app.exec_())