How to stop ASIHTTPRequest (using ARC) ?

Question

I use ARC, for the ASIHTTPRequest-Files I have the special compiler linker flag, so they don't use ARC. Now I create an ASIHTTPRequest like this:

...

@property(nonatomic,strong) ASIFormDataRequest *request;

@syntesize request

...

self.request = [[ASIFormDataRequest alloc]initWithURL:[NSURL URLWithString:API3]];
self.request.delegate=self;
[self.request startAsynchronous];

If the view closed before the request finished, I get a EXEC_BAD_ACCESS, because the view is already released. If I call a

[self.request clearDelegateAndCancel]

The request didn't stop and the App still continue to crash. I tried to call clearDelegateAndCancel on the main Thread and with performSelector afterDelay, but with the same results. When I enable the LOG output of ASIHTTPRequest, I see that the methods get called, and also the internal Function [self cancel] in ASIHTTPRequest.m is called, but the request didn't stop, I see it because of the Network Activity Indicator.

Does anyone else have this problem, or know how to solve?

pdenti pdenti · Accepted Answer · 2011-12-03T10:32:07

that is probably because your viewcontroller, that is the ASI delegate, is not managed as an arc weak pointer by ASI, and therefore not automatically updated to nil when the viewcontroller gets deallocated. You should implement dealloc in your arc viewcontroller in order to prevent ASI from calling back the non existing delegate (the viewcontroller)

- (void)dealloc
{
   [request clearDelegatesAndCancel];
}

even viewDidUnload should cancel the ASI request zeroing therefore the delegate

- (void)viewDidUnload
{
    [self.request clearDelegatesAndCancel];
    self.request = nil;

    [super viewDidUnload];
}

How to stop ASIHTTPRequest (using ARC) ?

2 Answers