我正在尝试将 json 对象发送到服务器。但我收到一个错误，我无法修复它。
-(void) connectToHost{
CFReadStreamRef readStream;
CFWriteStreamRef writeStream;
CFStreamCreatePairWithSocketToHost(NULL, (CFStringRef)@"localhost", 9123, &readStream, &writeStream);
inputStream = (__bridge NSInputStream *)readStream;
outputStream = (__bridge NSOutputStream *)writeStream;
[inputStream setDelegate:self];
[outputStream setDelegate:self];
[inputStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
[outputStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
[inputStream open];
[outputStream open]; }
这是我与主机的连接。
NSDictionary *setUser = [NSDictionary
dictionaryWithObjectsAndKeys:[@"u" stringByAppendingString:my.id],@"id",
@"GET_USER_INFO",@"command",
@"",@"value",
nil];
NSArray *array = [NSArray arrayWithObject:setUser];
jsonDataToSendTheServer = [array JSONRepresentation];
NSLog(@" %@ ", jsonDataToSendTheServer);
// array = [NSArray arrayWithObject:jsonDataToSendTheServer];
NSLog(@" %@ ", array);
NSLog(@"true or false %c",[NSJSONSerialization
isValidJSONObject: array]);
bytesWritten = [NSJSONSerialization writeJSONObject:array toStream:outputStream options:NSJSONWritingPrettyPrinted error:nil];
而这部分是 NSJSONSerialization 部分。但是我得到了一个错误。
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '***+[NSJSONSerialization writeJSONObject:toStream:options:error:]: stream is not open for writing'
我是objective-c的新手。我无法在 3 小时内解决问题。
========================================
编辑：
- (void)stream:(NSStream *)theStream handleEvent:(NSStreamEvent)streamEvent {
NSLog(@"stream event %i", streamEvent); //this doesn't post in the log when stream opened...
NSLog(@"bytes %i",bytesWritten);
switch (streamEvent) {
case NSStreamEventOpenCompleted:
NSLog(@"Stream opened");
break;
case NSStreamEventHasBytesAvailable:
if (theStream == inputStream) {
uint8_t buffer[1024];
int len;
while ([inputStream hasBytesAvailable]) {
len = [inputStream read:buffer maxLength:sizeof(buffer)];
if (len > 0) {
NSString *output = [[NSString alloc] initWithBytes:buffer length:len encoding:NSUTF8StringEncoding];
if (nil != output) {
NSLog(@"server said: %@", output);
//[self messageReceived:output];
}
}
}
}
break;
case NSStreamEventEndEncountered:
[theStream close];
[theStream removeFromRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
//[theStream release];
theStream = nil;
break;
case NSStreamEventHasSpaceAvailable:
{
uint8_t *readBytes = (uint8_t *)[_data mutableBytes];
readBytes += bytesWritten; // instance variable to move pointer
int data_len = [_data length];
unsigned int len = ((data_len - bytesWritten >= 1024) ?
1024 : (data_len-bytesWritten));
uint8_t buf[len];
(void)memcpy(buf, readBytes, len);
//len = [theStream write:(const uint8_t *)buf maxLength:len];
NSLog(@"written %s", buf );
bytesWritten += len;
}
break;
case NSStreamEventErrorOccurred:
{
NSLog(@"no connection");
}
case NSStreamEventNone:
{
//printf("EVENT: None.\n");
break;
}
default:
NSLog(@"Unknown event");
}}
这是我的流：handleEvent：函数。
现在，在我将 connectionToHost 添加到委托之后，我得到了这种错误。
012-08-10 16:14:27.302 TaraftarlikOyunu[2274:c07] written P∏◊P‡ˇø
2012-08-10 16:14:28.399 TaraftarlikOyunu[2274:c07] benim bu id 587127341
2012-08-10 16:14:28.399 TaraftarlikOyunu[2274:c07] benim ad Ahmet
2012-08-10 16:14:28.400 TaraftarlikOyunu[2274:c07]
[{"id":"u581277341","command":"GET_USER_INFO","value":""}]
2012-08-10 16:14:28.404 TaraftarlikOyunu[2274:c07] stream event 4
2012-08-10 16:14:28.404 TaraftarlikOyunu[2274:c07] bytes 86
(lldb)
现在我不知道它是否缓冲
=======================EDIT2=============== 对不起。问题可能是因为这个
(void)memcpy(buf, readBytes, len);
我只是复制并粘贴这部分代码。可能是什么问题！