利用NSThread创建新线程

 

detachNewThreadSelector:toTarget:withObject:

Detaches a new thread and uses the specified selector as the thread entry point.

+ (void)detachNewThreadSelector:(SEL) aSelector toTarget:(id) aTarget withObject:(id) anArgument

Parameters

aSelector

The selector for the message to send to the target. This selector must take only one argument and must not have a return value.

aTarget

The object that will receive the message aSelector on the new thread.

anArgument

The single argument passed to the target. May be nil.

Discussion

For non garbage-collected applications, the method aSelector is responsible for setting up an autorelease pool for the newly detached thread and freeing that pool before it exits. Garbage-collected applications do not need to create an autorelease pool.

The objects aTarget and anArgument are retained during the execution of the detached thread, then released. The detached thread is exited (using the exit class method) as soon as aTarget has completed executing the aSelectormethod.

If this thread is the first thread detached in the application, this method posts theNSWillBecomeMultiThreadedNotification with object nil to the default notification center.