Qt Designer 修改窗体大小改变控件位置

一.新建一个窗体

用qt designer 新建一个QWidget窗体， 在窗体中右键

选择布局， 发现布局是选择不了的，这个是因为窗体里面没有添加控件， 任意添加空间后便可选择 右键-- 布局-- 水平布局/垂直布局 等

二. 添加控件

我们添加一个group box 控件， 然后 右键 选择 布局 -- 垂直布局

在添加一个horizontalLayout， 再给horizontalLayout里面添加两个button按钮

向group box 里面添加一个label 和 botton

然后在group box 的里面选择右键 -- 布局 -- 水平布局

三. 添加spacers效果 

我们给group box 里面的两个控件直接添加一个horizontalSpacer

给group box 和horizontalLayout 直接添加一个verticalSpacer

在这里说明下spacers 缩放类型 sizeType

Expanding ： 可自行增大和收缩

Fixed：不能放大或缩小

Minimum：不能小于sizeHint尺寸，可放大（若设置了最大尺寸）

Maximum：不能放大，可缩小到允许的最小尺寸（若setMinimumSize(10,10)只能缩小到（10，10））

Preferred：控件的sizeHint是他的Hint,可以放大或缩小

四. 生成ui与py

spacersLayouts.ui文件：

 <?xml version="1.0" encoding="UTF-8"?>
 <ui version="4.0">
  <class>Form</class>
  <widget class="QWidget" name="Form">
   <property name="geometry">
    <rect>
     <x>0</x>
     <y>0</y>
     <width>518</width>
     <height>429</height>
    </rect>
   </property>
   <property name="windowTitle">
    <string>Form</string>
   </property>
   <layout class="QVBoxLayout" name="verticalLayout">
    <item>
     <widget class="QGroupBox" name="groupBox">
      <property name="minimumSize">
       <size>
        <width>0</width>
        <height>100</height>
       </size>
      </property>
      <property name="maximumSize">
       <size>
        <width>16777215</width>
        <height>200</height>
       </size>
      </property>
      <property name="title">
       <string>分组</string>
      </property>
      <layout class="QHBoxLayout" name="horizontalLayout">
       <item>
        <widget class="QLabel" name="label">
         <property name="text">
          <string>左侧</string>
         </property>
        </widget>
       </item>
       <item>
        <spacer name="horizontalSpacer_2">
         <property name="orientation">
          <enum>Qt::Horizontal</enum>
         </property>
         <property name="sizeHint" stdset="0">
          <size>
           <width>40</width>
           <height>20</height>
          </size>
         </property>
        </spacer>
       </item>
       <item>
        <widget class="QPushButton" name="pushButton_2">
         <property name="text">
          <string>右侧</string>
         </property>
        </widget>
       </item>
      </layout>
     </widget>
    </item>
    <item>
     <spacer name="verticalSpacer">
      <property name="orientation">
       <enum>Qt::Vertical</enum>
      </property>
      <property name="sizeType">
       <enum>QSizePolicy::Expanding</enum>
      </property>
      <property name="sizeHint" stdset="0">
       <size>
        <width>20</width>
        <height>100</height>
       </size>
      </property>
     </spacer>
    </item>
    <item>
     <layout class="QHBoxLayout" name="horizontalLayout_2">
      <property name="spacing">
       <number>6</number>
      </property>
      <item>
       <spacer name="horizontalSpacer">
        <property name="orientation">
         <enum>Qt::Horizontal</enum>
        </property>
        <property name="sizeHint" stdset="0">
         <size>
          <width>40</width>
          <height>20</height>
         </size>
        </property>
       </spacer>
      </item>
      <item>
       <widget class="QPushButton" name="pushButton_3">
        <property name="text">
         <string>确定</string>
        </property>
       </widget>
      </item>
      <item>
       <widget class="QPushButton" name="pushButton_4">
        <property name="text">
         <string>取消</string>
        </property>
       </widget>
      </item>
     </layout>
    </item>
   </layout>
  </widget>
  <resources/>
  <connections/>
 </ui>

生成的spacersLayouts.py 文件

 # -*- coding: utf-8 -*-

 # Form implementation generated from reading ui file 'spacersLayouts.ui'
 #
 # Created: Tue Mar 03 15:44:16 2015
 #      by: PyQt4 UI code generator 4.10.3
 #
 # WARNING! All changes made in this file will be lost!

 from PyQt4 import QtCore, QtGui

 try:
     _fromUtf8 = QtCore.QString.fromUtf8
 except AttributeError:
     def _fromUtf8(s):
         return s

 try:
     _encoding = QtGui.QApplication.UnicodeUTF8
     def _translate(context, text, disambig):
         return QtGui.QApplication.translate(context, text, disambig, _encoding)
 except AttributeError:
     def _translate(context, text, disambig):
         return QtGui.QApplication.translate(context, text, disambig)

 class Ui_Form(object):
     def setupUi(self, Form):
         Form.setObjectName(_fromUtf8("Form"))
         Form.resize(518, 429)
         self.verticalLayout = QtGui.QVBoxLayout(Form)
         self.verticalLayout.setObjectName(_fromUtf8("verticalLayout"))
         self.groupBox = QtGui.QGroupBox(Form)
         self.groupBox.setMinimumSize(QtCore.QSize(0, 100))
         self.groupBox.setMaximumSize(QtCore.QSize(16777215, 200))
         self.groupBox.setObjectName(_fromUtf8("groupBox"))
         self.horizontalLayout = QtGui.QHBoxLayout(self.groupBox)
         self.horizontalLayout.setObjectName(_fromUtf8("horizontalLayout"))
         self.label = QtGui.QLabel(self.groupBox)
         self.label.setObjectName(_fromUtf8("label"))
         self.horizontalLayout.addWidget(self.label)
         spacerItem = QtGui.QSpacerItem(40, 20, QtGui.QSizePolicy.Expanding, QtGui.QSizePolicy.Minimum)
         self.horizontalLayout.addItem(spacerItem)
         self.pushButton_2 = QtGui.QPushButton(self.groupBox)
         self.pushButton_2.setObjectName(_fromUtf8("pushButton_2"))
         self.horizontalLayout.addWidget(self.pushButton_2)
         self.verticalLayout.addWidget(self.groupBox)
         spacerItem1 = QtGui.QSpacerItem(20, 100, QtGui.QSizePolicy.Minimum, QtGui.QSizePolicy.Expanding)
         self.verticalLayout.addItem(spacerItem1)
         self.horizontalLayout_2 = QtGui.QHBoxLayout()
         self.horizontalLayout_2.setSpacing(6)
         self.horizontalLayout_2.setObjectName(_fromUtf8("horizontalLayout_2"))
         spacerItem2 = QtGui.QSpacerItem(40, 20, QtGui.QSizePolicy.Expanding, QtGui.QSizePolicy.Minimum)
         self.horizontalLayout_2.addItem(spacerItem2)
         self.pushButton_3 = QtGui.QPushButton(Form)
         self.pushButton_3.setObjectName(_fromUtf8("pushButton_3"))
         self.horizontalLayout_2.addWidget(self.pushButton_3)
         self.pushButton_4 = QtGui.QPushButton(Form)
         self.pushButton_4.setObjectName(_fromUtf8("pushButton_4"))
         self.horizontalLayout_2.addWidget(self.pushButton_4)
         self.verticalLayout.addLayout(self.horizontalLayout_2)

         self.retranslateUi(Form)
         QtCore.QMetaObject.connectSlotsByName(Form)

     def retranslateUi(self, Form):
         Form.setWindowTitle(_translate("Form", "Form", None))
         self.groupBox.setTitle(_translate("Form", "分组", None))
         self.label.setText(_translate("Form", "左侧", None))
         self.pushButton_2.setText(_translate("Form", "右侧", None))
         self.pushButton_3.setText(_translate("Form", "确定", None))
         self.pushButton_4.setText(_translate("Form", "取消", None))

 if __name__ == "__main__":
     import sys
     app = QtGui.QApplication(sys.argv)
     Form = QtGui.QWidget()
     ui = Ui_Form()
     ui.setupUi(Form)
     Form.show()
     sys.exit(app.exec_())

效果：