CODEWITHSUNDEEP
iosnsoperation
svvoff
svvoff

Reputation: 289

Is it possible to cancel nsoperation without access to it?

I need to use a library which is not woking properly. After calling some method it creates some NSOperation, which never finishes and ends up with sleeping state mach_msg_trap error and as because I don't have the instance of these operations, I'm unable to cancel it. Is it possible to cancel it without access?

Upvotes: 0

Views: 59

Answers (2)

Rob Napier
Rob Napier

Reputation: 299275

Note that even if you had access to the NSOperation or its queue, "cancel" doesn't mean "make go away." It just means "don't start if it hasn't been started yet, and if it has been started, set the cancel flag." If the NSOperation doesn't check its cancel flag, then it still won't terminate. There's no way to do what you're trying to do, and this is intentional. Forcibly terminating an operation would leave the program in an undefined state.

It sounds like you either have a bug in the library, or a bug in how you're using the library (I would suspect the latter before the former, but it depends on the library). You're going to need to track down that bug and resolve it.

Upvotes: 3

Hossam Ghareeb
Hossam Ghareeb

Reputation: 7113

Do you have access to the NSOperationQueue where these Operations have been added? If yes, you can access like this:

var queue = NSOperationQueue.mainQueue()
    // or
    queue = NSOperationQueue.currentQueue()!

    let operations = queue.operations
    for operation in operations{
        if operation.name == "name of operation if you know it" {

            operation.cancel()
        }
    }

Upvotes: 0

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