NsThread list task

Hello everyone I need to accomplish this (iphone/objective-c) :

• I have my thread it has to pe开发者_JAVA技巧rform the operations.
• the main thread assigns a new task to my thread (the tasks are always the same).
• each operation has its own id.

• the main thread when assigning a task to my thread, must check whether this operation is an operation that could stop (cancel) that is running on my thread (if new task id = task running id).

• Do you have any suggestions on how I might accomplish this?

• for this work...NSThread or NSOperation?
• I need a shared data structure and synchronized to the operations?
• how can I handle the abort the transaction without having to kill the thread? Thanks

Take a look at NSOperation and NSOperationQueue.