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从我的 PC 应用程序中,我将套接字数据发送到我的 iPhone。当数据到达时,它被存储为有符号值而不是无符号 (uint8)。所以我无法得到超过 127 的任何值。

当我发送 0xFF 时,它默认返回 0x3f。

CFReadStreamRead 是否仅适用于 ASCII 字符?如果是这样,什么是替代品?

我的代码:

CFReadStreamRef readStream = NULL;
CFWriteStreamRef writeStream = NULL;
CFIndex bytes;
UInt8 buffer[128];
UInt8 recv_len = 0;
UInt8 send_len = 0;

//
//Get the native socket that was used
CFSocketNativeHandle sock = *(CFSocketNativeHandle*)data;


//
//Create the read and write streams for this socket
CFStreamCreatePairWithSocket(kCFAllocatorDefault, sock, &readStream, &writeStream);

//
//Check for errors
if (!readStream || !writeStream)
{
    close(sock);
    fprintf(stderr, "CFStreamCreatePairWithSocket failed.");
    return;
}

//
//Open the streams
CFReadStreamOpen(readStream);
CFWriteStreamOpen(writeStream);

//
//Read the command bytes
short command = 0;

memset(buffer, 0, sizeof(buffer));
bytes = CFReadStreamRead(readStream, buffer, 12);
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1 回答 1

1

0x3f是 ASCII '?'。您是否尝试将字节缓冲区解码为 UTF-8 字符串?如果是这样,那就是你的问题。CFReadStreamAPI 不太可能弄乱数据;你更有可能是。

于 2011-07-26T06:29:49.587 回答