Does dispatch_async(dispatch_get_main_queue(), ^{...}); wait until done?

Does dispatch_async(dispatch_get_main_queue(), ^{...}); wait until done?

ios objective-c multithreading grand-central-dispatch dispatch-async

ios

Swift 3 warning for dispatch async

ios warnings swift3 dispatch-async deprecation-warning

ios

dispatch_async and block in iOS

ios dispatch-async

ios