Question

I’m trying to understand Objective C code and I’m stuck in this line

Code:

NSOperationQueue *queue = [[NSOperationQueue alloc] init];

I understand that this line constructs a new instance of a class NSOperationQueue. But what does this instance of NSOperationQueue do? Can anyone explain that to me? As I am more familiar with Java, it would be very helpful if someone could suggest me an equivalent piece of code in Java.

Answer 1

The NSOperationQueue implements basically the same functionality as you can get from a ThreadPoolExecutor plus a BlockingQueue in Java.

That is it takes a collection of NSOperations (approximate to Runnabless in Java) and executes then asynchronously.

With the added bonus that the operation queue tunes itself to the current run-time conditions.