如下所示是.h文件。
"object-c

import

typedef NS_ENUM(NSUInteger,BSDServerErrorCode) {
NOERROR,
SOCKETERROR,
BINDERROR,
LISTENERROR,
CFSOCKETCREATEERROR,
ACCEPTINGERROR
};

@interface BIDCFSocketServer : NSObject

@property (nonatomic)CFSocketRef sRef;
@property (nonatomic) int listenfd, errorCode;

-(instancetype)initOnPort:(int)port;

@end

如下图代码所示的是.m文件； "object-c #define LISTENQ 1024 @implementation BIDCFSocketServer -(instancetype)initOnPort:(int)port{ struct sockaddr_in servaddr; CFRunLoopSourceRef source; const CFSocketContext context = {0,NULL,NULL,NULL,NULL}; _errorCode = NOERROR; if((self.listenfd = socket(AF_INET,SOCK_STREAM,IPPROTO_TCP))<0) { _errorCode = NOERROR; }else{ memset(&servaddr,0,sizeof servaddr); servaddr.sin_family = AF_INET; servaddr.sin_addr.s_addr = htonl(INADDR_ANY); servaddr.sin_port = htons(port); if(bind(self.listenfd,(struct sockaddr*)&servaddr,sizeof(servaddr))<0) { _errorCode = BINDERROR; }else{ if(listen(self.listenfd,LISTENQ)< 0){ _errorCode = LISTENERROR; }else{ self.sRef = CFSocketCreateWithNative(NULL,self.listenfd,kCFSocketAcceptCallBack,acceptConnection,&context); if(self.sRef == NULL) { _errorCode = CFSOCKETCREATEERROR; }else{ source = CFSocketCreateRunLoopSource(kCFAllocatorDefault,self.sRef,0) ; CFRunLoopAddSource(CFRunLoopGetCurrent(),source,kCFRunLoopDefaultMode); CFRelease(source); CFRunLoopRun(); } } } } return self; } void acceptConnection(CFSocketRef sRef,CFSocketCallBackType cType,CFDataRef address,const void *data ,void * info) { CFSocketNativeHandle csock = *(CFSocketNativeHandle*)data; CFSocketRef sn; CFRunLoopSourceRef source; const CFSocketContext context = {0,NULL,NULL,NULL,NULL}; sn = CFSocketCreateWithNative(NULL,csock,kCFSocketDataCallBack,receiveData,&context); source = CFSocketCreateRunLoopSource(NULL,sn,0); CFRunLoopAddSource(CFRunLoopGetCurrent(),source,kCFRunLoopDefaultMode); CFRelease(source); CFRelease(sn); return; } void receiveData(CFSocketRef sRef,CFSocketCallBackType cType,CFDataRef address,const void * data,void *info) { CFDataRef df = (CFDataRef)data; long len = CFDataGetLength(df); if(len <= 0 )return ; UInt8 buf[len]; CFRange range = CFRangeMake(0,len); CFDataGetBytes(df,range,buf); buf[len] = '\0'; NSString * str = [[NSString alloc]initWithData:(__bridge NSData*)data encoding:NSASCIIStringEncoding]; NSLog(@"Recieved: %@",str); [[NSNotificationCenter defaultCenter] postNotificationName:@"posttext" object:str]; CFSocketSendData(sRef,address,df,0);//Echo back } @end

我想知道的是.m文件中的void acceptConnection(CFSocketRef sRef,CFSocketCallBackType cType,CFDataRef address,const void *data ,void * info) {...}是成员方法或者是是函数？其前面也没有加减号，以前从来么有见过。这东东是什么？能否补充下相关的知识，我的oc是自学的，求讲解下。谢谢各位大神！