帮助需要对目标C写的用NSStream TCP套接字

Question

我现在写使用NSStream TCP套接字。我可以打开流，但我不能写出任何东西（例如NSString或NSData）。

Answer 1

在你-stream:handleEvent:委托方法，当您收到NSStreamEventHasSpaceAvailable事件为NSOutputStream，您可以使用发送数据：

NSData *data = /* get some data… */; 
const uint8_t *buffer = [data bytes]; 
NSUInteger length = [data length]; 
NSInteger nwritten = [outputStream write:buffer maxLength:length]; 
if (-1 == nwritten) { 
    NSLog(@"Error writing to stream %@: %@", outputStream, [outputStream streamError]); 
} else { 
    NSLog(@"Wrote %ld bytes to stream %@.", (long)nwritten, outputStream); 
}