<ui version="4.0" > <class>First</class> <widget class="QWidget" name="First" >  <property name="geometry" >   <rect>    <x>0</x>    <y>0</y>    <width>300</width>    <height>300</height>   </rect>  </property>  <property name="windowTitle" >   <string>Form</string>  </property>  <widget class="QLabel" name="label" >   <property name="geometry" >    <rect>     <x>90</x>     <y>80</y>     <width>131</width>     <height>16</height>    </rect>   </property>   <property name="text" >    <string>這是第一個 UI !!</string>   </property>  </widget>  <widget class="QPushButton" name="childPushButton" >   <property name="geometry" >    <rect>     <x>190</x>     <y>240</y>     <width>75</width>     <height>23</height>    </rect>   </property>   <property name="text" >    <string>子窗口</string>   </property>  </widget> </widget> <resources/> <connections/></ui>