ui拖入控件label
Qt–菜单栏–View–Widget Box–label–拖入form1.ui

form1.cpp

QString sdata = this->readText("Hi");
this->label->setText(sdata);

chs.ts

<context>
    <name>form1</name>
    <message>
      <source>Hi</source>
      <translation>你好!</translation>
      <chars>10</chars>
    </message>
</context>

eng.ts

<context>
    <name>form1</name>
    <message>
      <source>Hi</source>
      <translation>Hello!</translation>
      <chars>10</chars>
    </message>
</context>