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Typical use case for GCD
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| // Doing something on the main thread | |
| dispatch_queue_t myQueue = dispatch_queue_create("My Queue",NULL); | |
| dispatch_async(myQueue, ^{ | |
| // Perform long running process | |
| dispatch_async(dispatch_get_main_queue(), ^{ | |
| // Update the UI | |
| }); | |
| }); | |
| // Continue doing other stuff on the | |
| // main thread while process is running. |
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