python Pyqt 控件写成一个类，怎么放进到QMainwindow中？

Question

coding: utf-8

现在分别是两个窗口,如何把GripLayout2窗口整体嵌入到Mainwindows类中，显示一个界面？

import sys
from PyQt4 import QtGui
from PyQt4.QtGui import *

class Mainwindows(QMainWindow):
    def __init__(self):
        super(Mainwindows, self).__init__()
        self.resize(1024,768)

class GripLayout2(QtGui.QWidget):
    def __init__(self):
        super(GripLayout2, self).__init__()
        self.initUI()
    def initUI(self):
        title = QtGui.QLabel('Title')
        author = QtGui.QLabel('Author')
        review = QtGui.QLabel('Review')
        titleEdit = QtGui.QLineEdit()
        authorEdit = QtGui.QLineEdit()
        reviewEdit = QtGui.QTextEdit()
        grid = QtGui.QGridLayout()
        grid.setSpacing(10)
        grid.addWidget(title, 1, 0)
        grid.addWidget(titleEdit, 1, 1)
        grid.addWidget(author, 2, 0)
        grid.addWidget(authorEdit, 2, 1)
        grid.addWidget(review, 3, 0)
        grid.addWidget(reviewEdit, 3, 1, 5, 1)
        self.setLayout(grid)
        self.setWindowTitle('grid layout')
        self.resize(350, 300)

app = QtGui.QApplication(sys.argv)
ui = Mainwindows()
ui.show()
ex = GripLayout2()
ex.show()
sys.exit(app.exec_())

Answer 1

思路是：在 QMainWindow 里面创建一个 layout，然后把 GridLayout2 窗口加入 layout 里面（这个思路有点问题，我记错了）

在 PyQt4 里面，QMainWindow 自己本来已经有一个 layout 了，你只需要调用 setCentralWidget 给 QMainWindow 指定一个 widget 就好了。

题外话：建议用 PyQt5 + python3 来做练习。PyQt4 已经过去好久了，5 的资源应该更多一点。

代码如下：

import sys
from PyQt4 import QtGui
from PyQt4.QtGui import *


class GripLayout2(QtGui.QWidget):
    def __init__(self, parent=None):
        super(GripLayout2, self).__init__(parent)
        self.initUI()


    def initUI(self):
        title = QtGui.QLabel('Title')
        author = QtGui.QLabel('Author')
        review = QtGui.QLabel('Review')
        titleEdit = QtGui.QLineEdit()
        authorEdit = QtGui.QLineEdit()
        reviewEdit = QtGui.QTextEdit()
        grid = QtGui.QGridLayout()
        grid.setSpacing(10)
        grid.addWidget(title, 1, 0)
        grid.addWidget(titleEdit, 1, 1)
        grid.addWidget(author, 2, 0)
        grid.addWidget(authorEdit, 2, 1)
        grid.addWidget(review, 3, 0)
        grid.addWidget(reviewEdit, 3, 1, 5, 1)
        self.setLayout(grid)
        self.setWindowTitle('grid layout')
        self.resize(350, 300)


class Mainwindows(QMainWindow):
    def __init__(self):
        super(Mainwindows, self).__init__()
        self.resize(1024,768)

        self.subwidget = GripLayout2(self)
        self.setCentralWidget(self.subwidget)


app = QtGui.QApplication(sys.argv)
ui = Mainwindows()
ui.show()
sys.exit(app.exec_())