code=exc_i386_invop subcode=0x0 in if statement...

Saving in Background Thread not getting finished...

For loop with background loop, with completion?...

Image loading lag in tableview with RSS feed datasource in Swift...

dispatch_async UIWebView loadrequest...

Saving URL data to a variable...

UITabBarController setSelectedIndex slow performance...

iOS Thread calling...

Process deadlock with nested dispatch_sync/dispath_async...

Proper usage of dispatch_async (GCD) call...

iOS: Do I need to release an internal system sound like 1104?...

Swift - Load information from Core Data faster...

Web page of WKWebView not displaying page inside of dispatch_get_main_queue...

NSArraym was mutated while being enumerated, sqlite3 while loop?...

Why do my async calls still block me from interacting with UI elements in Swift?...

Why does GCD make this code work correctly?...

which dispatch_async method is advisable to load the json data to table view controller?...

Problems loading scene async with button animation...

tableView still shows two rows even though I deleted one from the data source and reloaded the table...

Refer back to background queue with grand central dispatch/dispatch_async in Objective-C...

dispatch_async, keeping an outside variable correct...

How to avoid twice adding UIView on not ended block?...

How can I cancel a method after certain amount of time?...

Convert FIFO dispatch_async queue to concurrent...

Async tasks in a for loop...

GWTP Dispatch -- Replacement for DefaultDispatchAsync (RpcDispatchAsync)...

dispatch_async never finishes executing entire block...

iOS: numberOfSectionsInCollectionView message sent to deallocated instance...

performSelectorOnMainThread calling a selector on another viewcontroller...

How does a serial dispatch queue guarantee resource protection?...