Xcode报错

Undefined symbols for architecture x86_64:

  "_OBJC_CLASS_$_HeaderView", referenced from:

      objc-class-ref in ViewController.o

ld: symbol(s) not found for architecture x86_64

clang: error: linker command failed with exit code 1 (use -v to see invocation)

 

此处错误是由于你的在building phases中没有引用相关的头文件，好比这里就是没有引入HeaderView。

所以，只须要在 building phase 中的 Compile Sources  项 中添加对应的 HeaderView.m 文件就

能够了。