CODEWITHSUNDEEP
iosobjective-ccmultithreading
Bartek Uchański
Bartek Uchański

Reputation: 119

How to dispatch C function from objective-c method asynchronously

My iOS app uses a C function for some computing. I want to call it from -(void)viewDidLoad but I don't want it to freeze the main thread. I tried calling it with dispatch_async(dispatch_get_main_queue... block but it still was being called on the main thread. Also including function call into objective-c method and calling [self performSelector: InBackground] didn't work either. Please help. Is there any way I can perform C function in background in objective-c app ?

Upvotes: 0

Views: 841

Answers (2)

user6350341
user6350341

Reputation:

Or you can put it into an obj-c method and call that using:

[NSThread detachNewThreadSelector:(SEL)aSelector toTarget:(id)aTarget withObject:(id)anArgument];

Upvotes: 0

Sulthan
Sulthan

Reputation: 130082

You have to use a different queue, e.g.:

dispatch_queue_t backgroundQueue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);

dispatch_async(backgroundQueue, ^{
   // do something
});

See Dispatch Queues for more details.

Upvotes: 2

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