dispatch_async has lag somewhere, can't find where. is there an NSLog problem?

Question

So i have this code:

dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT,0), ^{

//Bunch of code

NSLog(@\"Test\");

});

w

Answer 1

UIKit isn’t thread-safe. Any calls you make that affect your UI need to be made on the main thread, or you’ll get weird, unpredictable behavior. Example:

dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{

    // Background code that doesn't need to update the UI here

    dispatch_async(dispatch_get_main_queue(), ^{
        // UI code here
    });
});