更新 PyQT 标签 [英] Updating PyQT label
本文介绍了更新 PyQT 标签的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我正在尝试使用计时器进行调度以更新网格中的某些值.下面是我尝试根据定时事件更新标签的示例.我已经成功地让它调用了该函数,但我无法更新标签.有什么想法吗?
I'm attempting to use a timer for scheduling to update certain values across the grid. Below is the example where I am attempting to update a label based on a timed event. I've successfully gotten it to call the function but I cannot update the label. Any thoughts?
import sys
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5 import QtCore, QtGui, QtWidgets
class App(QWidget):
def __init__(self):
super().__init__() #these values change where the main window is placed
self.title = 'This is my title'
self.left = 400
self.top = 400
self.width = 300
self.height = 200
self.initUI()
def initUI(self):
self.setWindowTitle(self.title)
self.setGeometry(self.left, self.top, self.width, self.height)
# call the gridlayout function
self.createGridLayout()
self.time_label.text = 'change the value'
windowLayout = QVBoxLayout()
windowLayout.addWidget(self.horizontalGroupBox)
self.setLayout(windowLayout)
self.show() #this sets the main window to the screen size
def createGridLayout(self):
time = self.getTime()
self.time_label = QLabel(time, self)
self.horizontalGroupBox = QGroupBox()
layout = QGridLayout()
layout.addWidget(QPushButton('1'),0,0)
layout.addWidget(QPushButton(time),0,1)
layout.addWidget(self.time_label,0,2)
self.horizontalGroupBox.setLayout(layout)
def getTime(self):
time = QTime.currentTime().toString()
return time
def updateTime():
App.time = QTime.currentTime().toString()
time = QTime.currentTime().toString()
print("Time: " + time)
# self.time_label = 'change the value'
# self..layout.time_label = 'asdf'
return time
def main():
app = QApplication(sys.argv)
ex = App()
timer=QtCore.QTimer()
timer.timeout.connect(App.updateTime)
timer.start(1000)
sys.exit(app.exec_())
if __name__ == '__main__':
# App.main()
main()
推荐答案
你的代码有一些错误,如果你想使用带有保留字 self
的类的属性,这个方法必须类的一个方法,为此它会改变:
Your code has some errors, if you want to use an attribute of the class with the reserved word self
, this method must be a method of the class, for this it changes:
def updateTime():
到
def updateTime(self):
如果你想改变一个 QLabel
的文本,你必须使用它的 setText()
.
If you want to change the text of a QLabel
you must use its setText()
.
import sys
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
class App(QWidget):
def __init__(self, parent=None):
super(App, self).__init__(parent=parent) # these values change where the main window is placed
self.title = 'This is my title'
self.left = 400
self.top = 400
self.width = 300
self.height = 200
self.initUI()
def initUI(self):
self.setWindowTitle(self.title)
self.setGeometry(self.left, self.top, self.width, self.height)
# call the gridlayout function
self.createGridLayout()
self.time_label.text = 'change the value'
windowLayout = QVBoxLayout()
windowLayout.addWidget(self.horizontalGroupBox)
self.setLayout(windowLayout)
self.show() # this sets the main window to the screen size
def createGridLayout(self):
time = self.getTime()
self.time_label = QLabel(time, self)
self.horizontalGroupBox = QGroupBox()
layout = QGridLayout()
layout.addWidget(QPushButton('1'), 0, 0)
layout.addWidget(QPushButton(time), 0, 1)
layout.addWidget(self.time_label, 0, 2)
self.horizontalGroupBox.setLayout(layout)
def getTime(self):
time = QTime.currentTime().toString()
return time
def updateTime(self):
time = QTime.currentTime().toString()
print("Time: " + time)
self.time_label.setText(time)
return time
def main():
app = QApplication(sys.argv)
ex = App()
timer = QTimer()
timer.timeout.connect(ex.updateTime)
timer.start(1000)
sys.exit(app.exec_())
if __name__ == '__main__':
main()
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