来自其他 class 的 PyQt4 setText 动态与 link 脚本
PyQt4 setText dynamic from other class with a link script
一切正常，而不是这种不便。
我试图设置文本，但它不起作用。
每次新扫描都应该显示从标签扫描的新文本，但它是来自 RFID 脚本的全局变量的相同文本。
from PyQt4 import QtCore, QtGui
from ui_mainwindow import Ui_MainWindow
import threading
import RPi.GPIO as GPIO
import MFRC522
import signal
import time
class MainWindow(QtGui.QMainWindow):
state1, state2, state3, state4 = range(4)
stateChanged = QtCore.pyqtSignal(int)
def __init__(self, parent=None):
QtGui.QMainWindow.__init__(self, parent)
self.ui = Ui_MainWindow()
self.ui.setupUi(self)
self.stateChanged.connect(self.onChangeState)
threading.Thread(target=self.reading, daemon=True).start()
def onChangeState(self, state):
MIFAREReader = MFRC522.MFRC522()
if state == MainWindow.state1:
self.ui.label_4.setText(MIFAREReader.tagId) ###-->text from RFID script
self.ui.label_2.setText(MIFAREReader.tagName) ###-->text from RFID script
self.ui.label_3.setText(MIFAREReader.tagDetails) ###-->text from RFID script
self.ui.label_3.show()
self.ui.label_2.show()
self.ui.label_4.show()
self.ui.groupBox.setStyleSheet("background: white;\n"
"border-style: solid;\n"
"border-width: 1px;\n"
"border-radius: 20px;")
elif state == MainWindow.state2:
self.ui.label_3.hide()
self.ui.label_2.hide()
self.ui.label_4.hide()
self.ui.groupBox.setStyleSheet("background: white url(scan.png) no-repeat center;\n"
"border-style: solid;\n"
"border-width: 1px;\n"
"border-radius: 20px;")
elif state == MainWindow.state3:
self.ui.groupBox.setStyleSheet("background: white url(accsd.png) no-repeat center;\n"
"border-style: solid;\n"
"border-width: 1px;\n"
"border-radius: 20px;")
elif state == MainWindow.state4:
self.ui.groupBox.setStyleSheet("background: white url(scan.png) no-repeat center;\n"
"border-style: solid;\n"
"border-width: 1px;\n"
"border-radius: 20px;")
def reading(self):
### Event Functions ###
continue_reading = True
# Hook the SIGINT
#signal.signal(signal.SIGINT, end_read)
# Create an object of the class MFRC522
MIFAREReader = MFRC522.MFRC522()
# This loop keeps checking for chips. If one is near it will get the UID and authenticate
while continue_reading:
# Scan for cards
(status,TagType) = MIFAREReader.MFRC522_Request(MIFAREReader.PICC_REQIDL)
# Get the UID of the card
(status,uid) = MIFAREReader.MFRC522_Anticoll()
# If we have the UID, continue
if status == MIFAREReader.MI_OK:
# This is the default key for authentication
key = [0xFF,0xFF,0xFF,0xFF,0xFF,0xFF]
# Select the scanned tag
MIFAREReader.MFRC522_SelectTag(uid)
# Authenticate
status = MIFAREReader.MFRC522_Auth(MIFAREReader.PICC_AUTHENT1A, 8, key, uid)
# Check if authenticated
if status == MIFAREReader.MI_OK:
MIFAREReader.MFRC522_Read(8)
self.stateChanged.emit(MainWindow.state1)
time.sleep(3)
MIFAREReader.MFRC522_StopCrypto1()
self.stateChanged.emit(MainWindow.state2)
else:
self.stateChanged.emit(MainWindow.state3)
time.sleep(2)
self.stateChanged.emit(MainWindow.state4)
if __name__ == "__main__":
import sys
app = QtGui.QApplication(sys.argv)
w = MainWindow()
w.show()
sys.exit(app.exec_())
这是我想从 RFID 脚本在 GUI 中打印的文本代码。
class MFRC522():
#Strings for GUI
tagId = "txt"
tagName = "txt"
tagDetails = "txt"
#########
#########
#########
#########
def MFRC522_Read(self, blockAddr):
self.tagId = "Product ID: "
self.tagName = "Product Name: "
self.tagDetails = "Product Details: "
recvData = []
recvData.append(self.PICC_READ)
recvData.append(blockAddr)
pOut = self.CalulateCRC(recvData)
recvData.append(pOut[0])
recvData.append(pOut[1])
(status, backData, backLen) = self.MFRC522_ToCard(self.PCD_TRANSCEIVE, recvData)
if not(status == self.MI_OK):
message = "Error while reading!"
## print (message)
i = 0
backDataText = ""
if len(backData) == 16:
for x in range(0, len(backData)):
backDataText = backDataText + chr(int(backData[x]))
for iA in range(len(self.indexMark)):
numbersFound = re.search(r'\d+', backDataText)
DataTextNumeric = numbersFound.group()
DataTextNumeric = int(DataTextNumeric)
if DataTextNumeric == self.indexMark[iA]:
message = "Product Code: %s \n Product Name: %s \n Details: %s" % (backDataText, self.productsName[iA], self.productsDetails[iA])
Id = DataTextNumeric
Name = self.productsName[iA]
Details = self.productsDetails[iA]
## print (message)
break
self.tagId += str(Id)
self.tagName += Name
self.tagDetails += Details
print (self.tagId) ###-->"Product ID: ####" this prints in the console
every time I scan a new thing, so the code works
代码很好，但我无法理解它是如何工作的。每次我读取一个新标签时，GUI 上的消息是 RFID 脚本中的全局变量值未更改。我没有那么多经验，很抱歉。
在 onChangeState() 中添加以下行：
MIFAREReader = MFRC522.MFRC522()
你正在创建另一个对象，它与 reading() 中创建的对象不同，因此不会有 RFID 信息，这让我认为你必须加强你的 OOP 概念。
如您在上一个问题中所述，应使用以下信号发送数据：
from PyQt4 import QtCore, QtGui
from ui_mainwindow import Ui_MainWindow
import threading
import RPi.GPIO as GPIO
import MFRC522
import signal
import time
class MainWindow(QtGui.QMainWindow):
state1, state2, state3, state4 = range(4)
stateChanged = QtCore.pyqtSignal(int)
infoChanged = QtCore.pyqtSignal(str, str, str)
def __init__(self, parent=None):
QtGui.QMainWindow.__init__(self, parent)
self.ui = Ui_MainWindow()
self.ui.setupUi(self)
self.infoChanged.connect(self.onInfoChanged)
self.stateChanged.connect(self.onChangeState)
threading.Thread(target=self.reading, daemon=True).start()
def onInfoChanged(self, text1, text2, text3):
self.ui.label_4.setText(text1) ###-->text from RFID script
self.ui.label_2.setText(text2) ###-->text from RFID script
self.ui.label_3.setText(text3) ###-->text from RFID script
def onChangeState(self, state):
if state == MainWindow.state1:
self.ui.label_3.show()
self.ui.label_2.show()
self.ui.label_4.show()
self.ui.groupBox.setStyleSheet("background: white;\n"
"border-style: solid;\n"
"border-width: 1px;\n"
"border-radius: 20px;")
elif state == MainWindow.state2:
self.ui.label_3.hide()
self.ui.label_2.hide()
self.ui.label_4.hide()
self.ui.groupBox.setStyleSheet("background: white url(scan.png) no-repeat center;\n"
"border-style: solid;\n"
"border-width: 1px;\n"
"border-radius: 20px;")
elif state == MainWindow.state3:
self.ui.groupBox.setStyleSheet("background: white url(accsd.png) no-repeat center;\n"
"border-style: solid;\n"
"border-width: 1px;\n"
"border-radius: 20px;")
elif state == MainWindow.state4:
self.ui.groupBox.setStyleSheet("background: white url(scan.png) no-repeat center;\n"
"border-style: solid;\n"
"border-width: 1px;\n"
"border-radius: 20px;")
def reading(self):
### Event Functions ###
continue_reading = True
# Hook the SIGINT
#signal.signal(signal.SIGINT, end_read)
# Create an object of the class MFRC522
MIFAREReader = MFRC522.MFRC522()
# This loop keeps checking for chips. If one is near it will get the UID and authenticate
while continue_reading:
# Scan for cards
(status,TagType) = MIFAREReader.MFRC522_Request(MIFAREReader.PICC_REQIDL)
# Get the UID of the card
(status,uid) = MIFAREReader.MFRC522_Anticoll()
# If we have the UID, continue
if status == MIFAREReader.MI_OK:
# This is the default key for authentication
key = [0xFF,0xFF,0xFF,0xFF,0xFF,0xFF]
# Select the scanned tag
MIFAREReader.MFRC522_SelectTag(uid)
# Authenticate
status = MIFAREReader.MFRC522_Auth(MIFAREReader.PICC_AUTHENT1A, 8, key, uid)
# Check if authenticated
if status == MIFAREReader.MI_OK:
MIFAREReader.MFRC522_Read(8)
self.stateChanged.emit(MainWindow.state1)
# send data via signal
self.infoChanged.emit(MIFAREReader.tagId, MIFAREReader.tagName, MIFAREReader.tagDetails)
time.sleep(3)
MIFAREReader.MFRC522_StopCrypto1()
self.stateChanged.emit(MainWindow.state2)
else:
self.stateChanged.emit(MainWindow.state3)
time.sleep(2)
self.stateChanged.emit(MainWindow.state4)
if __name__ == "__main__":
import sys
app = QtGui.QApplication(sys.argv)
w = MainWindow()
w.show()
sys.exit(app.exec_())
一切正常，而不是这种不便。 我试图设置文本，但它不起作用。 每次新扫描都应该显示从标签扫描的新文本，但它是来自 RFID 脚本的全局变量的相同文本。
from PyQt4 import QtCore, QtGui
from ui_mainwindow import Ui_MainWindow
import threading
import RPi.GPIO as GPIO
import MFRC522
import signal
import time
class MainWindow(QtGui.QMainWindow):
state1, state2, state3, state4 = range(4)
stateChanged = QtCore.pyqtSignal(int)
def __init__(self, parent=None):
QtGui.QMainWindow.__init__(self, parent)
self.ui = Ui_MainWindow()
self.ui.setupUi(self)
self.stateChanged.connect(self.onChangeState)
threading.Thread(target=self.reading, daemon=True).start()
def onChangeState(self, state):
MIFAREReader = MFRC522.MFRC522()
if state == MainWindow.state1:
self.ui.label_4.setText(MIFAREReader.tagId) ###-->text from RFID script
self.ui.label_2.setText(MIFAREReader.tagName) ###-->text from RFID script
self.ui.label_3.setText(MIFAREReader.tagDetails) ###-->text from RFID script
self.ui.label_3.show()
self.ui.label_2.show()
self.ui.label_4.show()
self.ui.groupBox.setStyleSheet("background: white;\n"
"border-style: solid;\n"
"border-width: 1px;\n"
"border-radius: 20px;")
elif state == MainWindow.state2:
self.ui.label_3.hide()
self.ui.label_2.hide()
self.ui.label_4.hide()
self.ui.groupBox.setStyleSheet("background: white url(scan.png) no-repeat center;\n"
"border-style: solid;\n"
"border-width: 1px;\n"
"border-radius: 20px;")
elif state == MainWindow.state3:
self.ui.groupBox.setStyleSheet("background: white url(accsd.png) no-repeat center;\n"
"border-style: solid;\n"
"border-width: 1px;\n"
"border-radius: 20px;")
elif state == MainWindow.state4:
self.ui.groupBox.setStyleSheet("background: white url(scan.png) no-repeat center;\n"
"border-style: solid;\n"
"border-width: 1px;\n"
"border-radius: 20px;")
def reading(self):
### Event Functions ###
continue_reading = True
# Hook the SIGINT
#signal.signal(signal.SIGINT, end_read)
# Create an object of the class MFRC522
MIFAREReader = MFRC522.MFRC522()
# This loop keeps checking for chips. If one is near it will get the UID and authenticate
while continue_reading:
# Scan for cards
(status,TagType) = MIFAREReader.MFRC522_Request(MIFAREReader.PICC_REQIDL)
# Get the UID of the card
(status,uid) = MIFAREReader.MFRC522_Anticoll()
# If we have the UID, continue
if status == MIFAREReader.MI_OK:
# This is the default key for authentication
key = [0xFF,0xFF,0xFF,0xFF,0xFF,0xFF]
# Select the scanned tag
MIFAREReader.MFRC522_SelectTag(uid)
# Authenticate
status = MIFAREReader.MFRC522_Auth(MIFAREReader.PICC_AUTHENT1A, 8, key, uid)
# Check if authenticated
if status == MIFAREReader.MI_OK:
MIFAREReader.MFRC522_Read(8)
self.stateChanged.emit(MainWindow.state1)
time.sleep(3)
MIFAREReader.MFRC522_StopCrypto1()
self.stateChanged.emit(MainWindow.state2)
else:
self.stateChanged.emit(MainWindow.state3)
time.sleep(2)
self.stateChanged.emit(MainWindow.state4)
if __name__ == "__main__":
import sys
app = QtGui.QApplication(sys.argv)
w = MainWindow()
w.show()
sys.exit(app.exec_())
这是我想从 RFID 脚本在 GUI 中打印的文本代码。
class MFRC522():
#Strings for GUI
tagId = "txt"
tagName = "txt"
tagDetails = "txt"
#########
#########
#########
#########
def MFRC522_Read(self, blockAddr):
self.tagId = "Product ID: "
self.tagName = "Product Name: "
self.tagDetails = "Product Details: "
recvData = []
recvData.append(self.PICC_READ)
recvData.append(blockAddr)
pOut = self.CalulateCRC(recvData)
recvData.append(pOut[0])
recvData.append(pOut[1])
(status, backData, backLen) = self.MFRC522_ToCard(self.PCD_TRANSCEIVE, recvData)
if not(status == self.MI_OK):
message = "Error while reading!"
## print (message)
i = 0
backDataText = ""
if len(backData) == 16:
for x in range(0, len(backData)):
backDataText = backDataText + chr(int(backData[x]))
for iA in range(len(self.indexMark)):
numbersFound = re.search(r'\d+', backDataText)
DataTextNumeric = numbersFound.group()
DataTextNumeric = int(DataTextNumeric)
if DataTextNumeric == self.indexMark[iA]:
message = "Product Code: %s \n Product Name: %s \n Details: %s" % (backDataText, self.productsName[iA], self.productsDetails[iA])
Id = DataTextNumeric
Name = self.productsName[iA]
Details = self.productsDetails[iA]
## print (message)
break
self.tagId += str(Id)
self.tagName += Name
self.tagDetails += Details
print (self.tagId) ###-->"Product ID: ####" this prints in the console
every time I scan a new thing, so the code works
代码很好，但我无法理解它是如何工作的。每次我读取一个新标签时，GUI 上的消息是 RFID 脚本中的全局变量值未更改。我没有那么多经验，很抱歉。
在 onChangeState() 中添加以下行：
MIFAREReader = MFRC522.MFRC522()
你正在创建另一个对象，它与 reading() 中创建的对象不同，因此不会有 RFID 信息，这让我认为你必须加强你的 OOP 概念。
如您在上一个问题中所述，应使用以下信号发送数据：
from PyQt4 import QtCore, QtGui
from ui_mainwindow import Ui_MainWindow
import threading
import RPi.GPIO as GPIO
import MFRC522
import signal
import time
class MainWindow(QtGui.QMainWindow):
state1, state2, state3, state4 = range(4)
stateChanged = QtCore.pyqtSignal(int)
infoChanged = QtCore.pyqtSignal(str, str, str)
def __init__(self, parent=None):
QtGui.QMainWindow.__init__(self, parent)
self.ui = Ui_MainWindow()
self.ui.setupUi(self)
self.infoChanged.connect(self.onInfoChanged)
self.stateChanged.connect(self.onChangeState)
threading.Thread(target=self.reading, daemon=True).start()
def onInfoChanged(self, text1, text2, text3):
self.ui.label_4.setText(text1) ###-->text from RFID script
self.ui.label_2.setText(text2) ###-->text from RFID script
self.ui.label_3.setText(text3) ###-->text from RFID script
def onChangeState(self, state):
if state == MainWindow.state1:
self.ui.label_3.show()
self.ui.label_2.show()
self.ui.label_4.show()
self.ui.groupBox.setStyleSheet("background: white;\n"
"border-style: solid;\n"
"border-width: 1px;\n"
"border-radius: 20px;")
elif state == MainWindow.state2:
self.ui.label_3.hide()
self.ui.label_2.hide()
self.ui.label_4.hide()
self.ui.groupBox.setStyleSheet("background: white url(scan.png) no-repeat center;\n"
"border-style: solid;\n"
"border-width: 1px;\n"
"border-radius: 20px;")
elif state == MainWindow.state3:
self.ui.groupBox.setStyleSheet("background: white url(accsd.png) no-repeat center;\n"
"border-style: solid;\n"
"border-width: 1px;\n"
"border-radius: 20px;")
elif state == MainWindow.state4:
self.ui.groupBox.setStyleSheet("background: white url(scan.png) no-repeat center;\n"
"border-style: solid;\n"
"border-width: 1px;\n"
"border-radius: 20px;")
def reading(self):
### Event Functions ###
continue_reading = True
# Hook the SIGINT
#signal.signal(signal.SIGINT, end_read)
# Create an object of the class MFRC522
MIFAREReader = MFRC522.MFRC522()
# This loop keeps checking for chips. If one is near it will get the UID and authenticate
while continue_reading:
# Scan for cards
(status,TagType) = MIFAREReader.MFRC522_Request(MIFAREReader.PICC_REQIDL)
# Get the UID of the card
(status,uid) = MIFAREReader.MFRC522_Anticoll()
# If we have the UID, continue
if status == MIFAREReader.MI_OK:
# This is the default key for authentication
key = [0xFF,0xFF,0xFF,0xFF,0xFF,0xFF]
# Select the scanned tag
MIFAREReader.MFRC522_SelectTag(uid)
# Authenticate
status = MIFAREReader.MFRC522_Auth(MIFAREReader.PICC_AUTHENT1A, 8, key, uid)
# Check if authenticated
if status == MIFAREReader.MI_OK:
MIFAREReader.MFRC522_Read(8)
self.stateChanged.emit(MainWindow.state1)
# send data via signal
self.infoChanged.emit(MIFAREReader.tagId, MIFAREReader.tagName, MIFAREReader.tagDetails)
time.sleep(3)
MIFAREReader.MFRC522_StopCrypto1()
self.stateChanged.emit(MainWindow.state2)
else:
self.stateChanged.emit(MainWindow.state3)
time.sleep(2)
self.stateChanged.emit(MainWindow.state4)
if __name__ == "__main__":
import sys
app = QtGui.QApplication(sys.argv)
w = MainWindow()
w.show()
sys.exit(app.exec_())