Questions tagged [dispatch-queue]
231 questions
0
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1 answer
How Do I Fix My Activity Indicator From Not Appearing/Freezing?
@IBOutlet weak var Input: UITextField!
@IBOutlet weak var Heads: UILabel!
@IBOutlet weak var working: UIActivityIndicatorView!
@IBAction func Toss(_ sender: Any) {
DispatchQueue.global().sync {
//set up variables and method
…
Aneesh Poddutur
- 29
- 5
0
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1 answer
SwiftUI: Return MLKit result to SwiftUI view not working
I have a ScannerService class that has the following function:
func detectText(photo: UIImage) -> String {
let textRecognizer = TextRecognizer.textRecognizer()
let visionImage = VisionImage(image: photo)
var textRecognized…
Ted.Mosby
- 21
- 3
0
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1 answer
tableview.reloaddata() still works outside of Dispatchqueue.main.sync when we retrieve data from FireStore
The rule is that "if you update the user-interface inside a closure that works in another thread, then you should call in DispatchQueue.main.async method. However, after I retrieved the data from the Firestore, tableview.reloadData() still works…
Akif
- 73
- 5
0
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1 answer
How can I organize a network login with Swifts DispatchQueue() and completionHandlers?
I'm trying to organize my login process with swifts DispatchQueue() and completionHandlers. First the user should log in and receive a jwt -token from the server, after that an automated download of a few things should happen.
I do have a function…
JacquesNorris
- 93
- 7
0
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0 answers
NSWindow translation animation in swift
I'm trying to animate an NSPanel after a delay.
class ViewController: NSViewController {
var alertPanel = NSPanel()
func removePanel(){
NSAnimationContext.runAnimationGroup { (cont) in
DispatchQueue.main.asyncAfter(deadline:…
unknown
- 788
- 9
- 24
0
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1 answer
Why Running torchscript model inference on IOS results in threading error?
I have been trying to integrate pytorch model developed on python into IOS. The example I have looked at is from this github repo.
I used the same d2go model in my own application. One thing I noticed is that if the model inference code isn't…
calveeen
- 621
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How Can I Fetch API Results in Queue
Firstly a domain name should be entered. Then, I have an add button, which adds keywords in an array[String], which keyword used for google searches through the API URL. If the specified domain name matches with any URL in search results the API…
Aybatu Kerküklüoğlu
- 11
- 3
0
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0 answers
DispatchSourceTimer schedule (GCD swift macOS) stops after 40 seconds when the app is hidden
For a macOS app (SwiftUI).
I'm setting up a simple timer using DispatchSource.makeTimerSource as shown below. It runs properly, but when the app is in background (hidden, minimized or not active), after 40 seconds it slows down a lot. Events are…
Brunni
- 143
- 1
- 11
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Where can I find the implementation of "class DispatchQueue : DispatchObject"?
I am interested to learn more about the implementation details of class DispatchQueue : DispatchObject.
I have looked here, and here but I can't find the matching implementation.
ScottyBlades
- 12,189
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How to start and stop Firebase performance traces from a singleton dictionary with DispatchQueue
I am in the process of implementing Firebase performance traces, so i made a shared instance and added a dictionary to hold them.
What i understand dictionaries are not thread safe and i need to add a dispatch queue to handle this.
How should i be…
Martin
- 191
- 2
- 4
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0 answers
Is there a way to remove observers after all new data is added?
Right now I am removing observer with DispatchQueue.main.asyncAfter(deadline: .now() + 2) {}. It should never take more that 2 seconds to load the data; this is swift not python. However, it is still a very unelegant solution. Also,…
florida27
- 67
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- 7
0
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1 answer
Background Queue processes Terminates app when minimised
I have 3 Background Queue tasks running on app launch. They take approximately 25sec to complete. There is no memory issues, nor an issue with the tasks themselves, the tasks simply go through a database for filtering/reading data purposes…
Paul
- 183
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- 12
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2 answers
Why does this function append the object twice to the array each time it runs?
I'm using swift's DispatchGroup() to help orchestrate a for loop that
finds a document in firesbase
converts the document to a custom object
appends the custom object to an array
With each pass, the function ends up appending each object twice to…
phil
- 993
- 1
- 10
- 34
0
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1 answer
Way to stop action repeating SwiftUI
I am using the following code in a quiz, where once the user answers the question an alert pops up. They then have the option to go to the next question OR review the question again and then after a time period the next question appears.
The issue…
Jon
- 23
- 5
0
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2 answers
How to add numbers using multiple threads?
I'm trying to add the numbers in a range eg. 1 to 50000000. But using a for-loop or reduce(_:_:) is taking too long to calculate the result.
func add(low: Int, high: Int) -> Int {
return (low...high).reduce(0, +)
}
Is there any way to do it…
PGDev
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