Unexpected ‘@’ in program. 直接在协议文件h.里面实现 报警告 求解答

[ghost]

@protocol Forkable

@optional

• (void)fork;

@required

• (NSString *)github;
• (void)jzj; @end // Protocol Extension @defs(Forkable)
• (void)fork { NSLog(@"Forkable protocol extension: I'm forking (%@).", self.github); }

• (void)jzj {

  NSLog(@"jzj"); }

• (NSString *)github { return @"This is a required method, concrete class must override me."; } @end

[beforeold]

Obviously, it is FORBIDDEN to implement any method in a .h file.