Created
July 19, 2016 05:55
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| let queue = DispatchQueue.global(attributes: .qosUserInitiated) | |
| let mainQueue = DispatchQueue.main | |
| mainQueue.async { | |
| dispatchPrecondition(condition: .notOnQueue(mainQueue)) | |
| // This code won't execute | |
| } | |
| queue.async { | |
| dispatchPrecondition(condition: .onQueue(queue)) | |
| // This code will execute | |
| } |
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