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UIApplication delegate must be used from main thread only - Swift

How to call Objective-C code from SwiftReceive answer from a delegate method on main threadWhy ios objective-c delegate are always called from the main thread?Main Thread Checker: UI API called on a background thread: -[UIApplication applicationState]-[UIApplication delegate] must be called from main thread onlySolve “Main Thread Checker: UI API called on a background thread: -[UIApplication setNetworkActivityIndicatorVisible:]” in UITestsXcode UIView.init(frame:) must be used from main thread onlyMain Thread Checker: UI API called on a background thread: -[UIApplication delegate] Freezes the applicationUIApplication.delegate must be used from main thread onlyXcode Error for iOS app: [UI Application Delegate] must be called from main thread only

.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;

-3

I am getting "runtime: UI API called from background thread: -[UIApplication delegate] must be used from main thread only
" runtime issue for Fabric initialisation line. Not sure how to solve it. Please help

Thanks

Fabric.with([Crashlytics.self,Zendesk.self])

ios swift google-fabric

share|improve this question

edited Mar 28 at 9:35

Vadim Kotov

5,33077 gold badges3636 silver badges4949 bronze badges

asked Mar 27 at 10:20

PriyankaPriyanka

8077 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  check once in your app where you used this UIApplication delegate] and [UIApplication applicationState]
  
  – Anbu.Karthik
  Mar 27 at 10:26
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I have checked and its no where used
  
  – Priyanka
  Mar 27 at 10:29
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  then its the bug in Fabric,
  
  – Anbu.Karthik
  Mar 27 at 10:32
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  application.statusbarStyle must be on main thread.
  
  – dahiya_boy
  Mar 27 at 10:36
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Priyanka The issue is related to firebase which firebase version you are using ?
  
  – Muhammad Waqas Bhati
  Mar 27 at 10:40
  
  

  
  
  
  

 | 
show 4 more comments

-3

I am getting "runtime: UI API called from background thread: -[UIApplication delegate] must be used from main thread only
" runtime issue for Fabric initialisation line. Not sure how to solve it. Please help

Thanks

Fabric.with([Crashlytics.self,Zendesk.self])

ios swift google-fabric

share|improve this question

edited Mar 28 at 9:35

Vadim Kotov

5,33077 gold badges3636 silver badges4949 bronze badges

asked Mar 27 at 10:20

PriyankaPriyanka

8077 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  check once in your app where you used this UIApplication delegate] and [UIApplication applicationState]
  
  – Anbu.Karthik
  Mar 27 at 10:26
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I have checked and its no where used
  
  – Priyanka
  Mar 27 at 10:29
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  then its the bug in Fabric,
  
  – Anbu.Karthik
  Mar 27 at 10:32
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  application.statusbarStyle must be on main thread.
  
  – dahiya_boy
  Mar 27 at 10:36
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Priyanka The issue is related to firebase which firebase version you are using ?
  
  – Muhammad Waqas Bhati
  Mar 27 at 10:40
  
  

  
  
  
  

 | 
show 4 more comments

I am getting "runtime: UI API called from background thread: -[UIApplication delegate] must be used from main thread only
" runtime issue for Fabric initialisation line. Not sure how to solve it. Please help

Thanks

Fabric.with([Crashlytics.self,Zendesk.self])

ios swift google-fabric

share|improve this question

edited Mar 28 at 9:35

Vadim Kotov

5,33077 gold badges3636 silver badges4949 bronze badges

asked Mar 27 at 10:20

PriyankaPriyanka

8077 bronze badges

Fabric.with([Crashlytics.self,Zendesk.self])

share|improve this question

edited Mar 28 at 9:35

Vadim Kotov

5,33077 gold badges3636 silver badges4949 bronze badges

asked Mar 27 at 10:20

PriyankaPriyanka

8077 bronze badges

share|improve this question

edited Mar 28 at 9:35

Vadim Kotov

5,33077 gold badges3636 silver badges4949 bronze badges

asked Mar 27 at 10:20

PriyankaPriyanka

8077 bronze badges

edited Mar 28 at 9:35

Vadim Kotov

5,33077 gold badges3636 silver badges4949 bronze badges

edited Mar 28 at 9:35

Vadim Kotov

5,33077 gold badges3636 silver badges4949 bronze badges

asked Mar 27 at 10:20

PriyankaPriyanka

8077 bronze badges

asked Mar 27 at 10:20

PriyankaPriyanka

8077 bronze badges

1 Answer
1

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1

It's because you are trying to access the UI from background thread. Just call the UI change in main thread.

DispatchQueue.main.async 
 application.statusBarStyle = UIStatusBarStyle.lightContent

UI process are maintained under main thread.

share|improve this answer

answered Mar 27 at 10:46

fAiSaLfAiSaL

43177 silver badges2323 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I have Tried it but same issue @fAiSaL
  
  – Priyanka
  Mar 27 at 10:55
  

  
  
  
  

add a comment | 

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1

It's because you are trying to access the UI from background thread. Just call the UI change in main thread.

DispatchQueue.main.async 
 application.statusBarStyle = UIStatusBarStyle.lightContent

UI process are maintained under main thread.

share|improve this answer

answered Mar 27 at 10:46

fAiSaLfAiSaL

43177 silver badges2323 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I have Tried it but same issue @fAiSaL
  
  – Priyanka
  Mar 27 at 10:55
  

  
  
  
  

add a comment | 

1

It's because you are trying to access the UI from background thread. Just call the UI change in main thread.

DispatchQueue.main.async 
 application.statusBarStyle = UIStatusBarStyle.lightContent

UI process are maintained under main thread.

share|improve this answer

answered Mar 27 at 10:46

fAiSaLfAiSaL

43177 silver badges2323 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I have Tried it but same issue @fAiSaL
  
  – Priyanka
  Mar 27 at 10:55
  

  
  
  
  

add a comment | 

It's because you are trying to access the UI from background thread. Just call the UI change in main thread.

DispatchQueue.main.async 
 application.statusBarStyle = UIStatusBarStyle.lightContent

UI process are maintained under main thread.

share|improve this answer

answered Mar 27 at 10:46

fAiSaLfAiSaL

43177 silver badges2323 bronze badges

DispatchQueue.main.async 
 application.statusBarStyle = UIStatusBarStyle.lightContent

share|improve this answer

answered Mar 27 at 10:46

fAiSaLfAiSaL

43177 silver badges2323 bronze badges

answered Mar 27 at 10:46

fAiSaLfAiSaL

43177 silver badges2323 bronze badges

answered Mar 27 at 10:46

fAiSaLfAiSaL

43177 silver badges2323 bronze badges