我有一个简单的客户端&服务器应用程序半使用CocoaAsyncSocket。我可以使用客户端连接到服务器,并可以在它们之间来回传递数据,并且委托方法似乎正确触发。我的问题是我只能将数据发送回传递给其中一个委托方法的(AsyncSocket *)对象。当接受连接时,我将套接字添加到NSMutableArray,但稍后如果我尝试使用套接字写入失败。所以
[connectedSockets addObject:newSocket];
//then later
[[connectedSockets objectAtIndex:i] writeData:someData withTimeout:-1 tag:0];
不起作用。服务器和客户端的代码如下。初始通信确实有效,但是当我的通知被调用时,没有数据被发送,即使NSLog语句测试数组中的套接字并获得正确的IP地址&端口#:
服务器:
- (id)init
{
self = [super init];
if (self) {
listenSocket = [[AsyncSocket alloc] initWithDelegate:self];
[listenSocket setRunLoopModes:[NSArray arrayWithObject:NSRunLoopCommonModes]];
[listenSocket acceptOnPort:42381 error:nil];
connectedSockets = [[NSMutableArray alloc] init];
newNotificationDictArray = [[NSMutableArray alloc] init];
updateNotificationDictArray = [[NSMutableArray alloc] init];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(newJobNotification:)
name:@"NewJob"
object:nil];
}
return self;
}
-(void)onSocketDidDisconnect:(AsyncSocket *)sock
{
[connectedSockets removeObject:sock];
}
- (void)onSocket:(AsyncSocket *)sock willDisconnectWithError:(NSError *)err
{
[connectedSockets removeObject:sock];
}
- (void)onSocket:(AsyncSocket *)sock didAcceptNewSocket:(AsyncSocket *)newSocket
{
[connectedSockets addObject:newSocket];
}
- (void)onSocket:(AsyncSocket *)sock didConnectToHost:(NSString *)host port:(UInt16)port
{
if ([newNotificationDictArray count] > 0) {
NSMutableData *data = [[NSMutableData alloc] init];
NSKeyedArchiver *archiver = [[NSKeyedArchiver alloc] initForWritingWithMutableData:data];
[archiver encodeObject:newNotificationDictArray forKey:@"DictArray"];
[archiver finishEncoding];
[archiver release];
[sock writeData:data withTimeout:-1 tag:0];
[data release];
}
[sock readDataWithTimeout:-1 tag:0];
}
- (void)onSocket:(AsyncSocket *)sock didWriteDataWithTag:(long)tag
{
[sock readDataWithTimeout:-1 tag:0];
}
- (void)onSocket:(AsyncSocket *)sock didReadData:(NSData *)data withTag:(long)tag
{
[sock readDataWithTimeout:-1 tag:0];
}
-(void) newJobNotification: (NSNotification *) notification
{
NSDictionary *dict = [notification userInfo];
[newNotificationDictArray addObject:dict];
[updateNotificationDictArray addObject:dict];
NSMutableData *updateData = [[NSMutableData alloc] init];
NSKeyedArchiver *archiver = [[NSKeyedArchiver alloc] initForWritingWithMutableData:updateData];
[archiver encodeObject:updateNotificationDictArray forKey:@"DictArray"];
[archiver finishEncoding]
[updateNotificationDictArray removeAllObjects];
[archiver release];
NSLog(@"Attempting to write to %@:%i", [[connectedSockets objectAtIndex:0] connectedHost], [[connectedSockets objectAtIndex:0] connectedPort])
[[connectedSockets objectAtIndex:0] writeData:updateData withTimeout:-1 tag:0];
}
然后是客户:
- (id)init
{
self = [super init];
if (self) {
socket = [[AsyncSocket alloc] initWithDelegate:self];
}
return self;
}
-(void) connectToHost: (NSString *) address
{
}
-(BOOL)onSocketWillConnect:(AsyncSocket *)sock
{
[sock retain];
[socket readDataWithTimeout:-1 tag:0];
return YES;
}
-(void)onSocket:(AsyncSocket *)sock didConnectToHost:(NSString *)host port:(UInt16)port
{
NSLog(@"Did Connect on port %i", [sock connectedPort]);
}
-(void) disconnectFromRemoteHost
{
[socket disconnect];
}
-(void)onSocketDidDisconnect:(AsyncSocket *)sock
{
NSLog(@"Did Disconnect");
}
- (void)onSocket:(AsyncSocket *)sock willDisconnectWithError:(NSError *)err
{
NSLog(@"Disconnect Error: %@", [err localizedDescription]);
}
- (void)onSocket:(AsyncSocket *)sock didWriteDataWithTag:(long)tag
{
[socket readDataWithTimeout:-1 tag:0];
}
- (void)onSocket:(AsyncSocket *)sock didReadData:(NSData *)data withTag:(long)tag
{
NSKeyedUnarchiver *unarchiver = [[NSKeyedUnarchiver alloc] initForReadingWithData:data];
NSArray *dictArray = [[unarchiver decodeObjectForKey:@"DictArray"] retain];
[unarchiver finishDecoding];
[unarchiver release];
for (NSDictionary *dict in dictArray) {
if ([[dict objectForKey:@"Kind"] isEqualTo:@"New"])
[[NSNotificationCenter defaultCenter] postNotificationName:@"NewJob" object:self userInfo:dict];
else if ([[dict objectForKey:@"Kind"] isEqualTo:@"Update"])
[[NSNotificationCenter defaultCenter] postNotificationName:@"JobUpdate" object:self userInfo:dict];
}
[socket readDataWithTimeout:-1 tag:0];
}
帮我堆栈溢出,你是我唯一的希望!
答案 0 :(得分:1)
我发布了您发布的代码的两个潜在问题。第一个似乎不太可能导致你的问题,但无论如何我会发布它。在您的客户端代码中,您有:
-(BOOL)onSocketWillConnect:(AsyncSocket *)sock
{
[sock retain];
[socket readDataWithTimeout:-1 tag:0];
return YES;
}
我不确定你为什么要在这里保留“袜子”。您已经拥有了自己创建的套接字的保留副本,这似乎可能导致泄漏。
至于第二个问题,更可能是你失败的原因,这就是我认为正在发生的事情。查看AsyncSocket的文档,我看到了:
但是,AsyncSocket不是线程安全的。您必须只调用AsyncSocket上的方法 配置套接字的线程/ runloop。如果你发现自己在一个线程上 与AsyncSocket运行的线程不同,您需要调用a 在AsyncSocket上的方法,然后你必须使用像performSelector:onThread:这样的方法来确保 该方法在AsyncSocket的线程上调用(从而保持线程安全)。
接收通知并触发“稍后”写入的代码可能在另一个线程中,因此即使线程有效,写入也无法按预期执行。如果您想要线程安全,AsyncSocket文档会建议您使用GCDAsyncSocket。