我使用MFMailComposeViewController训练为iPhone创建程序.但是,编译时会发生错误:
Undefined symbols for architecture i386:
"_OBJC_CLASS_ $ _MFMailComposeViewController", Referenced from:
objc-class-ref in ViewController.o
ld: symbol (s) not found for architecture i386
clang: error: linker command failed with exit code 1 (use-v to see invocation)
请帮忙,这是什么？以及如何解决它？
提前致谢!