CODEWITHSUNDEEP
iosobjective-cperformselector
user1761289
user1761289

Reputation: 29

In ios how to perform a method with NSData return type in background

In iOS how to perform a method with NSData return type in background.

I have tried this:

NSData *loginiddata=[self performSelectorInBackground:@selector(loaddatawithurl:param:) withObject:OBJ];

but its not working.

Upvotes: 0

Views: 289

Answers (1)

Martin R
Martin R

Reputation: 539955

There are two problems with performSelectorInBackground in your case: That method has no return value (compare Ken Thomases' comment above), and it works only with methods taking a single argument. The easiest solution (in my opinion) is to use GCD (Grand Central Dispatch) methods instead:

dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
    NSData *loginiddata = [self loaddatawithurl:url params:params];
    // ... 
});

Upvotes: 2

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