我在qt designer设计了一个按钮，中文名叫关闭，我用tmake编译的 ，在编译时老出现如下错误：
qq.cpp: In member function `virtual void Form1::languageChange()':
qq.cpp:67: `trUtf8' undeclared (first use this function)
qq.cpp:67: (Each undeclared identifier is reported only once for each function
it appears in.)
make: *** [qq.o] 错误 1
我已经定义了trUtf8的头文件了，还说初次使用？？？
