PyQt5 设计师。使按钮事件起作用
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【中文标题】PyQt5 设计师。使按钮事件起作用【英文标题】:PyQt5 Designer. Getting a button event to function 【发布时间】:2018-04-05 09:16:01 【问题描述】:我正在尝试使用 Qt Designer 让按钮事件处理程序工作。
我在 Python 3.6 中使用 Anaconda-Spyder
出现表单,但按钮btn_browse
不起作用。行编辑框有一个光标,你可以在里面输入。
从 ui 自动生成的 Python 文件如下。它被称为file_reader.py
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_Dialog(object):
def setupUi(self, Dialog):
Dialog.setObjectName("Dialog")
Dialog.resize(640, 320)
self.btn_browse = QtWidgets.QPushButton(Dialog)
self.btn_browse.setGeometry(QtCore.QRect(220, 50, 113, 32))
self.btn_browse.setObjectName("btn_browse")
self.lineEdit = QtWidgets.QLineEdit(Dialog)
self.lineEdit.setGeometry(QtCore.QRect(170, 120, 241, 131))
self.lineEdit.setObjectName("lineEdit")
self.retranslateUi(Dialog)
QtCore.QMetaObject.connectSlotsByName(Dialog)
def retranslateUi(self, Dialog):
_translate = QtCore.QCoreApplication.translate
Dialog.setWindowTitle(_translate("Dialog", "Dialog"))
self.btn_browse.setText(_translate("Dialog", "MyButton"))
我使用的代码(几乎来自 QtDesigner Docs 站点)是
from PyQt5 import QtGui
from PyQt5.QtWidgets import QDialog, QApplication
from file_reader import Ui_Dialog
class Dialog(QDialog):
def __init__(self):
super(Dialog, self).__init__()
# Set up the user interface from Designer.
self.ui = Ui_Dialog()
self.ui.setupUi(self)
# Make some local modifications.
self.ui.colorDepthCombo.addItem("2 colors (1 bit per pixel)")
# Connect up the buttons.
self.ui.btn_browse.clicked.connect(self.browse_folder)
def browse_folder(self):
#exit
print("Hello")
#self.textBrowser.clear() # In case there are any existing elements in the list
directory = QtGui.QFileDialog.getExistingDirectory(self,"Pick a folder")
# execute getExistingDirectory dialog and set the directory variable to be equal
# to the user selected directory
if directory: # if user didn't pick a directory don't continue
for file_name in os.listdir(directory): # for all files, if any, in the directory
self.listWidget.addItem(file_name) # add file to the listWidget
import sys
app = QApplication(sys.argv)
window = Dialog() #Also tried QDialog() here
ui = Ui_Dialog()
ui.setupUi(window)
window.show()
sys.exit(app.exec_())
我认为没有调用函数browse_folder
。我认为问题可能是使用的 QDialog 类而不是 QMainForm。我
我正在努力。另外,我不确定 ui 转换器中的 x 开关是做什么的。
我在这里看了几个答案,看不出我做错了什么。
【问题讨论】:
【参考方案1】:您的代码存在以下问题:
您创建的不是 Dialog 对象,而是一个填充有Ui_Dialog
的QDialog
,它没有browse_folder 方法或连接。
QFileDialog
是QtWidgets
的一部分,它不是QtGui
的一部分,您可能正在使用PyQt4
的示例。
我假设listWidget
来自Ui_Dialog
,所以您必须通过ui
登录。
from PyQt5.QtWidgets import QDialog, QApplication, QFileDialog
from file_reader import Ui_Dialog
import os
class Dialog(QDialog):
def __init__(self):
super(Dialog, self).__init__()
# Set up the user interface from Designer.
self.ui = Ui_Dialog()
self.ui.setupUi(self)
# Make some local modifications.
self.ui.colorDepthCombo.addItem("2 colors (1 bit per pixel)")
# Connect up the buttons.
self.ui.btn_browse.clicked.connect(self.browse_folder)
def browse_folder(self):
#exit
print("Hello")
#self.textBrowser.clear() # In case there are any existing elements in the list
directory = QFileDialog.getExistingDirectory(self,"Pick a folder")
# execute getExistingDirectory dialog and set the directory variable to be equal
# to the user selected directory
if directory: # if user didn't pick a directory don't continue
for file_name in os.listdir(directory): # for all files, if any, in the directory
self.ui.listWidget.addItem(file_name) # add file to the listWidget
import sys
app = QApplication(sys.argv)
window = Dialog()
window.show()
sys.exit(app.exec_())
【讨论】:
你的意思是 window = Dialog() 应该是 window=QDialog() 吗?这两种我都试过了。 @nerak99 你试过我建议的代码了吗? 嘿对不起eyllanesc。我不是这里的常客。在我注释掉'self.ui.colorDepthCombo.addItem(“2种颜色(每像素1位)”)'之后,我得到了某个地方。谢谢。是父类的 colorDepthCombo.additem() 方法吗?如果是这样,我应该通过 super() 或其他方式调用它 感谢您的“Skandix”。如何在我的班级中调用 QDialog 方法? @nerak99 QDialog不是方法,是类,调用它是什么意思?以上是关于PyQt5 设计师。使按钮事件起作用的主要内容,如果未能解决你的问题,请参考以下文章