iphone - been having a little confusion about the retainCount of NSURLConnection

Question

first look at these code:

NSURL *url = [[NSURL alloc] initWithString:@"lasdhfkjasf"];
NSURLRequest *request = [[NSURLRequest alloc] initWithURL:url];
NSURLConnection *_conn = [[NSURLConnection alloc] initWithRequest:request delegate:self];
NSLog(@"aaaaaaaaa  %d", [_conn retainCount]);
[url release];
[request release];
[_conn release];

turns out it prints "aaaaaaaaaaaaa 2",shouldn't it be 1?Or there are some kind of exception out there.Then I change it :

NSURL *url = [[NSURL alloc] initWithString:@"lasdhfkjasf"];
NSURLRequest *request = [[NSURLRequest alloc] initWithURL:url];
NSURLConnection *_conn = [[NSURLConnection alloc] init];
NSLog(@"aaaaaaaaa  %d", [_conn retainCount]);
[url release];
[request release];
[_conn release];

I don't know happen in the initWithRequest:delegate: method,has anybody know about it?

Answer 1

Whilst not technically a duplicate of the question Nikolai linked to, the same thing applies:

Don't use the retainCount property

It's possibly the worst thing Apple ever put into NSObject, because it's so nicely named it tricks you into thinking it's actually useful.

See the question you were previously linked to - Objective C NSString* property retain count oddity - but look for the second answer, the highest rated one.