QtCore.QMetaObject.connectSlotsByName：根據objectName和signal自動綁定slot

 

 

from PyQt5.QtWidgets import (QWidget
            , QVBoxLayout , QHBoxLayout, 
             QLineEdit, QPushButton)

from PyQt5.QtCore import  pyqtSignal
from PyQt5 import QtCore
##############################################

# 參考大丸子的博客
#http://jimmykuu.sinaapp.com/blog/11






class LoginView(QWidget):
    
    ## 登錄界面時發送 關閉信號
    quitSignal = pyqtSignal()
    loginSignal = pyqtSignal(list)
    # server端沒有響應
    openFailureSignal = pyqtSignal()
    
    

    
    
    def __init__(self, parent=None):
        super(LoginView, self).__init__(parent)
        self.ids_receive = []
        
        self._init_ui()


        
    def _init_ui(self):    

        layout_button = QHBoxLayout()       
        layout_input = QHBoxLayout()       
        
        self.input_name = QLineEdit()
        self.input_pass = QLineEdit()
        
        
        button_login =  QPushButton("登錄")
        button_login.setObjectName("ok_button")
        
        button_quit  =  QPushButton("取消")
        button_hello  =  QPushButton("hello")
        self.button_hello = button_hello
        button_hello.setObjectName("hello_button")

        #button_login.clicked.connect(self.do_login)
        #button_quit.clicked.connect(self.loginQuit)
        
        layout_button.addWidget(button_login)
        layout_button.addWidget(button_quit)
        
        layout_input.addWidget(self.input_name)
        layout_input.addWidget(self.input_pass)
        layout_input.addWidget(self.button_hello)
        
  
        layout_main = QVBoxLayout()  
        self.setLayout(layout_main)
        layout_main.addLayout(layout_button)
        layout_main.addLayout(layout_input)
   
        # QMetaObject. connectSlotsByName(QObject)
        #網上百度到的說明:其作用是如其名稱一樣，用來將QObject 里的子孫QObject的某些信號按照其objectName連接到相應的槽上
        #       ,如 button_hello.setObjectName("hello_button")
        # 官網解釋用法: http://doc.qt.io/qt-5/qmetaobject.html#connectSlotsByName
        QtCore.QMetaObject.connectSlotsByName(self)
     
    def loginQuit(self):
        print ("cencel")
    
    #試試注銷掉該裝飾器
    # 有點奇怪啊，一旦注釋掉裝飾器,打印會執行兩次啊
    #QtCore.pyqtSlot(str, str)可以攜帶參數的
    @QtCore.pyqtSlot() 
    def on_hello_button_clicked(self):   
        print('on_pbHello_clicked')
       
    @QtCore.pyqtSlot()    
    def on_ok_button_clicked(self):
        print ("OK")
        self.loginSignal.emit([1, 2])
        

        
    def do_login(self):
        #獲取用戶和密碼文本框的內容
        u_name = self.input_name.text()
        u_pass =  self.input_pass.text()
        
       
        print('u_name', u_name, u_pass)
        
        

        
if __name__ == '__main__':

    import sys
    from PyQt5.QtWidgets import QApplication
    app = QApplication(sys.argv)    

    login = LoginView()
    login.show()

    sys.exit(app.exec_())