can't receive a notification after posting inside connectionDidFinishLoading:, NSURLConnection delegate method

问题

I can't receive a notification with this:

a class for doing NSURLConnection async stuff

- (void)connectionDidFinishLoading:(NSURLConnection *)connection {

    NSDictionary *userInfo = [NSDictionary dictionaryWithObjectsAndKeys:_receivedData, @"receivedData", nil];
    [[NSNotificationCenter defaultCenter] postNotificationName:kWebServiceURLTemperaturaMaximaKMLNotitificationName object:self userInfo:userInfo];

}

another class observing the notification:

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(didReceivedCompleteData:) name:kWebServiceURLTemperaturaMaximaKMLNotitificationName object:self];

any thoughts?

回答1:

Error is here:

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(didReceivedCompleteData:) name:kWebServiceURLTemperaturaMaximaKMLNotitificationName object:self];

This means that notification center will send notification named name:kWebServiceURLTemperaturaMaximaKMLNotitificationName to self that is also generated by self. You should replace object:self with object:nil (to receive any notification named name:kWebServiceURLTemperaturaMaximaKMLNotitificationName) or with object that is actually sending the notification.

来源：https://stackoverflow.com/questions/8188633/cant-receive-a-notification-after-posting-inside-connectiondidfinishloading-n