Question

-(void)messageSend:(NSString *)message;
{
NSLog(@"messageSend");
urlString = [[NSString alloc] initWithFormat:@"http://someaddress/message/send?from=%@&msg=%@&latitude=0&longitude=0",appDelegate.userName,message];
NSMutableDictionary *dictionary = [[NSMutableDictionary alloc] initWithDictionary:[self request:urlString]];
NSLog(@"Dictionary response");
if ([dictionary count] > 0)
{
    if ([[dictionary objectForKey:@"send"] isEqualToString:@"OK"] )
    {
        NSLog(@"envio de mensagem de %@ Ok: %@",appDelegate.userName,message);
    }
}
[urlString release];
[dictionary release];
}

Gives an error of -[__NSArrayM getObjects:andKeys:]: unrecognized selector sent to instance. After some testing with NSLogs, the line

NSMutableDictionary *dictionary = [[NSMutableDictionary alloc] initWithDictionary:[self request:urlString]];

is the culprit, witch is calling this method:

-(NSDictionary *)request:(NSString *)requestString
{
url =[[NSURL alloc] initWithString:requestString];
request = [NSURLRequest requestWithURL:url cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:10];
error = [[NSError alloc] init];
responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
[responseData retain];
NSString *tempString = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding];
NSMutableDictionary *tempDict= [[[NSMutableDictionary alloc] init] autorelease];
if (request)
{
    Parser *parser = [[Parser alloc] init];
    tempDict = [parser readXMLString:tempString];
    for (id key in tempDict)
    {
        NSLog(@"%@ is %@",key,[tempDict objectForKey:key]);
    }
}
[url release];
[error release];
[responseData release];
[tempString release];
return tempDict;
}

And it happens when the string of the message has spaces.
But it was not happening before.

Answer 1

The culprit is the line tempDict = [parser readXMLString:tempString]. In fact, this means your previous creation of a [[[NSMutableDictionary alloc] init] autorelease] is pointless, as it will just be overwritten by the return value of [parser readXMLString:tempString]. In any case, it appears the -readXMLString: method is returning an NSArray instead of an NSDictionary.