将CFReadStreamRef转换/转换为NSInputStream（iOS5） [英] Convert/cast CFReadStreamRef to NSInputStream (iOS5)

问题描述

我正在尝试将我的应用移植到iOS5。我通过CFSockets使用TCP连接到服务器。我现在的问题是从CFReadStreamRef到NSInputStream的转换（强制转换）（与write相同）。使用iOS4，我可以使用免费桥接，但iOS5的自动引用计数不再可能。这就是我得到的：

I am trying to port my app to iOS5. I am using a TCP connection to a server via CFSockets. My problem now is the conversion (cast) from CFReadStreamRef to NSInputStream (same with write). With iOS4 I could use the toll-free bridging, but with automatic reference counting of iOS5 this isn't possible anymore. This is what I get:

error: Automatic Reference Counting Issue: Cast to 'NSInputStream *' of a non-Objective-C to an Objective-C pointer is disallowed with Automatic Reference Counting

代码：

        CFReadStreamRef readStream;
        CFWriteStreamRef writeStream;

        CFStringRef strRef = CFStringCreateWithCString(NULL,
              [urlStr UTF8String],
              NSUTF8StringEncoding);
        CFStreamCreatePairWithSocketToHost(NULL,
           strRef,
           4444,
           &readStream,
           &writeStream);



        NSInputStream *iStream = (NSInputStream *)readStream;
        NSOutputStream *oStream = (NSOutputStream *)writeStream;         

还有另一种方法可以将套接字输出/输入NSStream吗？
感谢您的任何提示！

Is there another way to pipe the socket out/input into an NSStream? Thanks for any hint!

推荐答案

管理免费电话桥接非常明确地指出您应该使用以下内容：

Managing Toll-Free Bridging states very clearly that you should use something like this:

NSInputStream *iStream = objc_unretainedObject(readStream);

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