In Swift how to call method with parameters on GCD main thread?

by

Modern versions of Swift use DispatchQueue.main.async to dispatch to the main thread:

DispatchQueue.main.async { 
  // your code here
}

To dispatch after on the main queue, use:

DispatchQueue.main.asyncAfter(deadline: .now() + 0.1) {
  // your code here
}

Older versions of Swift used:

dispatch_async(dispatch_get_main_queue(), {
  let delegateObj = UIApplication.sharedApplication().delegate as YourAppDelegateClass
  delegateObj.addUIImage("yourstring")
})

More Related Contents:

  1. How to get boolean value from switch state?
  2. iOS 9 not opening Instagram app with URL SCHEME
  3. How would I create a UIAlertView in Swift?
  4. UITableView example for Swift
  5. How to use background thread in swift?
  6. Save string to the NSUserDefaults?
  7. Move textfield when keyboard appears swift
  8. Get the length of a String
  9. Add an element to an array in Swift
  10. How do you add an in-app purchase to an iOS application?
  11. How can I scan barcodes on iOS? [closed]
  12. How do I write dispatch_after GCD in Swift 3, 4, and 5?
  13. Create space at the beginning of a UITextField
  14. Make a UIButton programmatically in Swift
  15. Delete all keys from a NSUserDefaults dictionary iOS
  16. One timer per table view cell
  17. Convert Image to CVPixelBuffer for Machine Learning Swift
  18. How can I change the font of the back button for my navigation bar?
  19. Best way to parse URL string to get values for keys?
  20. How to get UIScrollView vertical direction in Swift?
  21. swift: issue in converting string to double
  22. Uncaught exception: This class is not key value coding-compliant [duplicate]
  23. Catch an exception for invalid user input in swift
  24. Show iPhone cut copy paste menu on UILabel
  25. Maximum number of threads with async-await task groups
  26. Repeating local notification daily at a set time with swift
  27. Expected declaration error for making high score [duplicate]
  28. UIView’s border color in Interface builder doesn’t work?
  29. Detect backspace Event in UITextField
  30. Prevent dispatch_after() background task from being executed

Leave a Comment