On 18 May 2011, at 12:55 PM, Bing Li wrote:
> NSXMLElement *root = [NSXMLNode elementWithName:"MessageRoot"];
> NSXMLDocument *xmlDoc = [[NSXMLDocument alloc]
> initWithRootElement:root];
> [xmlDoc setVersion:"1.0"];
> [xmlDoc setCharacterEncoding:"utf-8"];
// etc.
You repeatedly pass C ("", array-of-char) strings to Cocoa methods, which with
rare exceptions require NSStrings (@""). Change that.
In fact, the code you are showing us should not have compiled, at least not
without many, many warnings. If this isn't your actual source code, it makes it
harder for us to help, because you aren't showing us the actual cause of your
problem.
> [passwordElement release];
// [peerKeyElement release];
> [peerNameElement releases]; // The line is added.
I assume this is release, not releases.
> [root release];
> [xmlDoc release];
> [xmlStr release];
> [data release];
For future questions, you should say what exception you got and what the stack
trace was.
Except for xmlStr and xmlDoc (which were created with alloc), none of these
releases are correct. You got those objects from convenience methods, and they
are already autoreleased. It's mere chance that you didn't see the consequences
until you added another release.
Re-read the memory-management rules. They're simple once you know them, but
there's a rule against trying to make a full statement of them on this list.
— F
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