Questions tagged [dispatch-queue]

231 questions
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IOS Swift How can I get value from an Async method

I am new to Swift and was wondering how can I get a value from an Async task. I have a function that gets Json data from an API on return I would like to get the value of a particular field outside of the async task... My code is below essentially I…
user1591668
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how to create dispatch queue in objective c?

I want to use below code in objective c. var recordingQueue = DispatchQueue(label: "recordingQueue", qos: DispatchQoS.userInteractive)
iEhsan
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Is the following a safe use of dispatch_set_target_queue()?

What I want to do is create an indirect queue targeting the main queue. dispatch_queue_t myQueue = dispatch_queue_create("com.mydomain.my-main-queue", NULL); dispatch_set_target_queue(myQueue, dispatch_get_main_queue()); My ultimate goal is to use…
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Serial Queue sync method interrupting UIView animation on Main

I am having an issue where I have a progress bar animation running on main being interrupted by sync calls to my Serial Queue. Previously I did not use this queue as a serial queue, and only as an asynchronous queue -- however this lead to issues…
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How can I wait for an operation to be finished before continuing?

I have a main function (buttonPressed), that should print out a Jsonfile. func buttonPressed { var jasonFile = JSON() jasonFile = getInfo(parA: 5, parB: 10) //1. takes some time print(jsonFile) //prints before the JSON is get from the…
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3 answers

Run and Pause an ARSession in a specified period of time

I'm developing ARKit/Vision iOS app with gesture recognition. My app has a simple UI containing single UIView. There's no ARSCNView/ARSKView at all. I'm putting a sequence of captured ARFrames into CVPixelBuffer what then I use for…
Andy Jazz
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