如何访问框架的元素，如果这些元素放置在布局上 (HBoxLayout())

Question

我正在创建一个 window，它允许我在按下按钮时添加一个文本框数组，但是当我按下按钮并调用该函数时，我收到一个错误消息，上面写着'IndicSelectWindow' 对象没有属性 "whatever "。我尝试其他更简单的方法，比如更改标签上的内容，但我也无法访问标签。我该怎么做才能修复它？请...:(

import sys
from PyQt4.QtGui import *


class IndicSelectWindow(QDialog):

    def __init__(self, parent=None):
        super(IndicSelectWindow, self).__init__(parent=parent)
        # cero un layout vertical para las matrices
        layoutmatrices = QVBoxLayout()
        ##########################

        # create the area for the matrix
        scrollarea = QScrollArea()
        scrollarea.setWidgetResizable(True)
        widgetdelscrollarea = QWidget()
        layoutgrilla = QGridLayout(widgetdelscrollarea)
        scrollarea.setWidget(widgetdelscrollarea)
        ###########################

        # now now place elements in the array layout
        #the elements consist of a layout where the buttons are placed and another layout where the area is placed
        layoutelementosmatriz1 = QHBoxLayout()
        labelm1 = QLabel("Matriz 1")
        labelmf1 = QLabel("Filas")
        labelmc1 = QLabel("Columnas")
        botonm1 = QPushButton("Aceptar")
        text_m1f = QLineEdit()
        text_m1c = QLineEdit()
        layoutelementosmatriz1.addWidget(labelm1)
        layoutelementosmatriz1.addWidget(labelmf1)
        layoutelementosmatriz1.addWidget(text_m1f)
        layoutelementosmatriz1.addWidget(labelmc1)
        layoutelementosmatriz1.addWidget(text_m1c)
        layoutelementosmatriz1.addWidget(botonm1)
        layoutelementosmatriz1.setSpacing(20)

        botonm1.clicked.connect(lambda: self.create_matrix())  ##eventos

        layoutmatrices.addLayout(layoutelementosmatriz1)
        layoutmatrices.addWidget(scrollarea)

        ####################################3 i create the layout for the frame
        layoutgeneral = QHBoxLayout()
        self.setLayout(layoutgeneral)
        self.resize(800, 500)
        #################################
        # I add the elements to the frame
        layoutgeneral.addLayout(layoutmatrices)
        ###################################


    def create_matrix(self): #this method I use to fill the array with "QLineEdit"
        self.labelm1.setText("gdsgs")
        for i in range(10):
            for j in range(10):
                self.layoutgrilla.addWidget(QLineEdit(), i, j) #line 18


if __name__ == '__main__':
    app = QApplication(sys.argv)
    w = IndicSelectWindow()
    w.show()
    sys.exit(app.exec_())

Answer 1

问题是因为变量只能在它们创建的上下文中访问，在您的代码构造函数的情况下。在整个class中只有classes的成员是可访问的，为此我们必须将self放在变量名中，例如：

layoutgrilla

到

self.layoutgrilla

如何访问框架的元素，如果这些元素放置在布局上 (HBoxLayout())

how to access the elements of a frame, if these are placed on layouts (HBoxLayout())

python

pyqt

pyqt4

qlabel

pyqt5