Crashing on unrecognized selector sent with SimplePost request after it works successfully.

问题

I've been using the SimplePost classes for several weeks and haven't had any problems. Now I'm crashing after a Request returns proper data in a Connection. I haven't (knowingly) touched the SimplePost class files. But when I run the analyzer, it now (never did before) points out the following method:

+ (NSMutableURLRequest *) urlencodedRequestWithURL:(NSURL *)url andDataDictionary:(NSDictionary *) dictionary {
   //  Create POST request
   NSMutableURLRequest *urlencodedPostRequest = [NSMutableURLRequest requestWithURL:url];
   [urlencodedPostRequest setHTTPMethod:@"POST"];
   //  Add HTTP header info
   [urlencodedPostRequest addValue:@"application/x-www-form-urlencoded" forHTTPHeaderField: @"Content-Type"];
   //  Add POST body
   NSMutableData *POSTBody = [NSMutableData data];
   //  Add k/v to the body
   NSArray *keyArray = [dictionary allKeys];
   for( int i = 0; i < [keyArray count]; ++i ) {
       // Core Foundation function used to transform @ ==> %40 , etc
       NSString *escapedString = (__bridge NSString *) CFURLCreateStringByAddingPercentEscapes(NULL, (__bridge CFStringRef)([dictionary objectForKey:[keyArray objectAtIndex:i]]),NULL, (CFStringRef)@"!*'();:@&=+$,/?%#[]", kCFStringEncodingUTF8);
       [POSTBody appendData:[[NSString stringWithFormat:@"%@=%@", [keyArray objectAtIndex:i], escapedString] dataUsingEncoding:NSUTF8StringEncoding]];
       if( i < ([keyArray count] - 1) ) {
            [POSTBody appendData:[[NSString stringWithFormat:@"&"] dataUsingEncoding:NSUTF8StringEncoding]];
       }
   }
   [urlencodedPostRequest setHTTPBody:POSTBody];
   return urlencodedPostRequest;
}

And running the Analyzer shows me:

the lines continue as:

I'm having a hard time understanding what's happening. Can anyone help, please? Thanks!

回答1:

Have you tried the __bridge_transfer for escapedString?

   NSString *escapedString = (__bridge_transfer NSString *) CFURLCreateStringByAddingPercentEscapes(NULL, (__bridge CFStringRef)([dictionary objectForKey:[keyArray objectAtIndex:i]]),NULL, (CFStringRef)@"!*'();:@&=+$,/?%#[]", kCFStringEncodingUTF8);

cf. Correct bridging for ARC?

来源：https://stackoverflow.com/questions/13726202/crashing-on-unrecognized-selector-sent-with-simplepost-request-after-it-works-su

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automatic-ref-counting

analyzer