QtDesigner布局未拉伸（预览与GUI不同）

Question

我在QtDesigner 5.6.2中做了以下布局，在QtDesigner GUI中看起来不错：

基本上，我希望按钮与文本一样宽（加上边距），垂直方向上它们应该尽可能地扩展，但它们应该保持在左侧

剩余的空间应该是一个水平布局，其中包含几个滑块，并且与水平布局的典型情况一样，它们在水平方向上“均匀分布”

但是当我点击表单/预览时。。。在应用程序中（或使用下面的sample.py代码），我得到以下信息：

基本上，所有的东西都在中心被“压缩”，我不明白为什么会这样

如何使预览与QtDesigner中的相同

test1.ui

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>MainWindow</class>
 <widget class="QMainWindow" name="MainWindow">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>579</width>
    <height>332</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string>MainWindow</string>
  </property>
  <widget class="QWidget" name="centralwidget">
   <layout class="QGridLayout" name="gridLayout">
    <item row="0" column="0">
     <layout class="QHBoxLayout" name="horizontalLayout" stretch="0,1">
      <item>
       <layout class="QVBoxLayout" name="verticalLayout">
        <item>
         <widget class="QPushButton" name="pushButton">
          <property name="sizePolicy">
           <sizepolicy hsizetype="Maximum" vsizetype="Minimum">
            <horstretch>0</horstretch>
            <verstretch>0</verstretch>
           </sizepolicy>
          </property>
          <property name="text">
           <string>PushButton</string>
          </property>
         </widget>
        </item>
        <item>
         <widget class="QPushButton" name="pushButton_2">
          <property name="sizePolicy">
           <sizepolicy hsizetype="Maximum" vsizetype="Minimum">
            <horstretch>0</horstretch>
            <verstretch>0</verstretch>
           </sizepolicy>
          </property>
          <property name="text">
           <string>PushButton</string>
          </property>
         </widget>
        </item>
       </layout>
      </item>
      <item>
       <layout class="QHBoxLayout" name="horizontalLayout_2">
        <item>
         <widget class="QSlider" name="verticalSlider_2">
          <property name="orientation">
           <enum>Qt::Vertical</enum>
          </property>
         </widget>
        </item>
        <item>
         <widget class="QSlider" name="verticalSlider_3">
          <property name="orientation">
           <enum>Qt::Vertical</enum>
          </property>
         </widget>
        </item>
        <item>
         <widget class="QSlider" name="verticalSlider_4">
          <property name="orientation">
           <enum>Qt::Vertical</enum>
          </property>
         </widget>
        </item>
        <item>
         <widget class="QSlider" name="verticalSlider_5">
          <property name="orientation">
           <enum>Qt::Vertical</enum>
          </property>
         </widget>
        </item>
        <item>
         <widget class="QSlider" name="verticalSlider">
          <property name="orientation">
           <enum>Qt::Vertical</enum>
          </property>
         </widget>
        </item>
       </layout>
      </item>
     </layout>
    </item>
   </layout>
  </widget>
  <widget class="QMenuBar" name="menubar">
   <property name="geometry">
    <rect>
     <x>0</x>
     <y>0</y>
     <width>579</width>
     <height>21</height>
    </rect>
   </property>
  </widget>
  <widget class="QStatusBar" name="statusbar"/>
 </widget>
 <resources/>
 <connections/>
</ui>

test1.py

import sys
from PyQt5 import QtCore, QtWidgets, QtGui, uic
from PyQt5.QtCore import pyqtSlot

class MyMainWindow(QtWidgets.QMainWindow):
  def __init__(self):
    super(MyMainWindow, self).__init__()
    uic.loadUi('test1.ui', self)
    self.show()

def main():
  app = QtWidgets.QApplication(sys.argv)
  window = MyMainWindow()
  sys.exit(app.exec_())

if __name__ == "__main__":
  main()

Answer 1

预览不一定与设计相同，因为在预览中元素相互作用。解决方案还包括通过将水平尺寸策略更改为“最小值”，使QSLIDER水平扩展：

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>MainWindow</class>
 <widget class="QMainWindow" name="MainWindow">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>579</width>
    <height>332</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string>MainWindow</string>
  </property>
  <widget class="QWidget" name="centralwidget">
   <layout class="QGridLayout" name="gridLayout">
    <item row="0" column="0">
     <layout class="QHBoxLayout" name="horizontalLayout" stretch="0,1">
      <item>
       <layout class="QVBoxLayout" name="verticalLayout">
        <item>
         <widget class="QPushButton" name="pushButton">
          <property name="sizePolicy">
           <sizepolicy hsizetype="Maximum" vsizetype="Minimum">
            <horstretch>0</horstretch>
            <verstretch>0</verstretch>
           </sizepolicy>
          </property>
          <property name="text">
           <string>PushButton</string>
          </property>
         </widget>
        </item>
        <item>
         <widget class="QPushButton" name="pushButton_2">
          <property name="sizePolicy">
           <sizepolicy hsizetype="Maximum" vsizetype="Minimum">
            <horstretch>0</horstretch>
            <verstretch>0</verstretch>
           </sizepolicy>
          </property>
          <property name="text">
           <string>PushButton</string>
          </property>
         </widget>
        </item>
       </layout>
      </item>
      <item>
       <layout class="QHBoxLayout" name="horizontalLayout_2">
        <item>
         <widget class="QSlider" name="verticalSlider_2">
          <property name="sizePolicy">
           <sizepolicy hsizetype="Minimum" vsizetype="Expanding">
            <horstretch>0</horstretch>
            <verstretch>0</verstretch>
           </sizepolicy>
          </property>
          <property name="orientation">
           <enum>Qt::Vertical</enum>
          </property>
         </widget>
        </item>
        <item>
         <widget class="QSlider" name="verticalSlider_3">
          <property name="sizePolicy">
           <sizepolicy hsizetype="Minimum" vsizetype="Expanding">
            <horstretch>0</horstretch>
            <verstretch>0</verstretch>
           </sizepolicy>
          </property>
          <property name="orientation">
           <enum>Qt::Vertical</enum>
          </property>
         </widget>
        </item>
        <item>
         <widget class="QSlider" name="verticalSlider_4">
          <property name="sizePolicy">
           <sizepolicy hsizetype="Minimum" vsizetype="Expanding">
            <horstretch>0</horstretch>
            <verstretch>0</verstretch>
           </sizepolicy>
          </property>
          <property name="orientation">
           <enum>Qt::Vertical</enum>
          </property>
         </widget>
        </item>
        <item>
         <widget class="QSlider" name="verticalSlider_5">
          <property name="sizePolicy">
           <sizepolicy hsizetype="Minimum" vsizetype="Expanding">
            <horstretch>0</horstretch>
            <verstretch>0</verstretch>
           </sizepolicy>
          </property>
          <property name="orientation">
           <enum>Qt::Vertical</enum>
          </property>
         </widget>
        </item>
        <item>
         <widget class="QSlider" name="verticalSlider">
          <property name="sizePolicy">
           <sizepolicy hsizetype="Minimum" vsizetype="Expanding">
            <horstretch>0</horstretch>
            <verstretch>0</verstretch>
           </sizepolicy>
          </property>
          <property name="orientation">
           <enum>Qt::Vertical</enum>
          </property>
         </widget>
        </item>
       </layout>
      </item>
     </layout>
    </item>
   </layout>
  </widget>
  <widget class="QMenuBar" name="menubar">
   <property name="geometry">
    <rect>
     <x>0</x>
     <y>0</y>
     <width>579</width>
     <height>26</height>
    </rect>
   </property>
  </widget>
  <widget class="QStatusBar" name="statusbar"/>
 </widget>
 <resources/>
 <connections/>
</ui>