Created
July 13, 2011 19:32
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dispatch_async Useful pattern to avoid blocking the main thread
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| Nested invocations provide asynchronous callbacks | |
| • Communication between subsystems | |
| -(IBAction)onClick:(NSButton *)sender | |
| { | |
| dispatch_async(account->queue, | |
| ^{ | |
| NSImageRep *image = renderAccountStatement(account); | |
| dispatch_async(dispatch_get_main_queue(),^{ | |
| [imagedraw]; | |
| }); | |
| }); | |
| } |
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