何时释放NSUrlConnection对象

Question

What is the correct point at which to release a NSUrlConnection object?

In my program, I alloc a NSUrlConnection, and then initWithRequest to kick off asynchronously.

I am now responsible for releasing the object - when do I/can I release? Immediately if I'm not using it again?

Answer 1

When you are done with the NSURLConnection . You'll know you're done with it when your NSURLConnection delegate receives - (void)connectionDidFinishLoading:(NSURLConnection *)connection or - (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error . Just release it at the end of those two methods.

Answer 2

Your usage of the NSUrlConnection can be released immediately.

The framework will release when it has finished with it.

Answer 3

您不需要释放它，直到框架向您发出通知，例如， connection:didFailWithError: .

Answer 4

This is a bit late (your question was posted in 2009, over a year ago) but I was having the some trouble with my NSUrlConnection code. NSUrlConnection kept crashing and I thought the crash was related to my release of NSUrlConnection [theConnection release]; . I was writing my code as in Apple's example here , but I ended up releasing the connection after it was created in "Listing 1" rather than releasing it where Apple does in both didFailWithError and connectionDidFinishLoading and it seems to work fine. I'm not completely sure, but maybe both of those delegates were being called and a double release was what was causing the crash. I wasn't sure I could release my NSUrlConnection object right after it was created until I read this question but that seemed to do the trick.