iPhone - isKindOfClass生成链接器错误

Question

我有一个像这样定义的类：

@interface ServerCall : NSObject {
// vars
}

// properties

// functions (init)

@end

和

@interface ServerNotification : ServerCall {
    // just vars
}
@end

我在另一个班级打电话：

if ([call isKindOfClass:[ServerNotification class]])
   // do things

构建时出现此错误：

Undefined symbols for architecture i386:
  "_OBJC_CLASS_$_ServerNotification", referenced from:
      objc-class-ref in ServerCommunication.o
ld: symbol(s) not found for architecture i386
collect2: ld returned 1 exit status

  "_OBJC_CLASS_$_ServerNotification", referenced from:
      objc-class-ref in ServerCommunication.o
ld: symbol(s) not found for architecture i386
collect2: ld returned 1 exit status

我在构建设置中也有“默认情况下隐藏的符号”= NO

我错过了什么？

Answer 1

链接器找不到ServerNotification类的实现。您是否已将匹配的实施文件添加到目标中？