Calling UIKit methods from other threads
I have a function that must be called from a non-main thread. In that thread, I am trying to determine status bar orientation like this:
let currentInterfaceOrientation = UIApplication.shared.statusBarOrientation
But I obviously get a run time warning like this.
UIApplication.statusBarOrientation() must be used from main thread only
My question is how to determine status bar orientation on secondary thread if you need it? Using DispatchQueue.main.sync is the right way but is risky for the reasons of potential deadlocks.
var currentInterfaceOrientation = UIInterfaceOrientation.landscapeLeft
DispatchQueue.main.sync
currentInterfaceOrientation = UIApplication.shared.statusBarOrientation
What are the safe ways here using Swift?
ios swift multithreading uikit ios-multithreading
asked Nov 11 '18 at 11:58
Deepak SharmaDeepak Sharma
1,3731937
add a comment |
I have a function that must be called from a non-main thread. In that thread, I am trying to determine status bar orientation like this:
let currentInterfaceOrientation = UIApplication.shared.statusBarOrientation
But I obviously get a run time warning like this.
UIApplication.statusBarOrientation() must be used from main thread only
My question is how to determine status bar orientation on secondary thread if you need it? Using DispatchQueue.main.sync is the right way but is risky for the reasons of potential deadlocks.
var currentInterfaceOrientation = UIInterfaceOrientation.landscapeLeft
DispatchQueue.main.sync
currentInterfaceOrientation = UIApplication.shared.statusBarOrientation
What are the safe ways here using Swift?
ios swift multithreading uikit ios-multithreading
asked Nov 11 '18 at 11:58
Deepak SharmaDeepak Sharma
1,3731937
add a comment |
I have a function that must be called from a non-main thread. In that thread, I am trying to determine status bar orientation like this:
let currentInterfaceOrientation = UIApplication.shared.statusBarOrientation
But I obviously get a run time warning like this.
UIApplication.statusBarOrientation() must be used from main thread only
My question is how to determine status bar orientation on secondary thread if you need it? Using DispatchQueue.main.sync is the right way but is risky for the reasons of potential deadlocks.
var currentInterfaceOrientation = UIInterfaceOrientation.landscapeLeft
DispatchQueue.main.sync
currentInterfaceOrientation = UIApplication.shared.statusBarOrientation
What are the safe ways here using Swift?
ios swift multithreading uikit ios-multithreading
asked Nov 11 '18 at 11:58
Deepak SharmaDeepak Sharma
1,3731937
I have a function that must be called from a non-main thread. In that thread, I am trying to determine status bar orientation like this:
let currentInterfaceOrientation = UIApplication.shared.statusBarOrientation
But I obviously get a run time warning like this.
UIApplication.statusBarOrientation() must be used from main thread only
My question is how to determine status bar orientation on secondary thread if you need it? Using DispatchQueue.main.sync is the right way but is risky for the reasons of potential deadlocks.
var currentInterfaceOrientation = UIInterfaceOrientation.landscapeLeft
DispatchQueue.main.sync
currentInterfaceOrientation = UIApplication.shared.statusBarOrientation
What are the safe ways here using Swift?
ios swift multithreading uikit ios-multithreading
ios swift multithreading uikit ios-multithreading
asked Nov 11 '18 at 11:58
Deepak SharmaDeepak Sharma
1,3731937
asked Nov 11 '18 at 11:58
Deepak SharmaDeepak Sharma
1,3731937
edited Nov 11 '18 at 12:04
Deepak Sharma
asked Nov 11 '18 at 11:58
Deepak SharmaDeepak Sharma
1,3731937
asked Nov 11 '18 at 11:58
Deepak SharmaDeepak Sharma
1,3731937
asked Nov 11 '18 at 11:58
Deepak SharmaDeepak Sharma
1,3731937
1,3731937
add a comment |
add a comment |
1 Answer
1
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votes
I have a function that must be called from a non-main thread.
Add the orientation as an argument to this function.
answered Nov 11 '18 at 13:33
messebmesseb
17118
Problem is there is a chain of functions and this one sits at the top of the stack, all these functions are called on secondary thread.
– Deepak Sharma
Nov 11 '18 at 15:46
1
Could you give a small code example? I can't imagine that it is not possible to inject a dependency. To accessUIApplication.shareddirectly is a little code smell. The easiest solution would be to create another global Object, where you set the orientation fromUIApplication.shared.statusBarOrientation
– messeb
Nov 11 '18 at 15:56
add a comment |
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1 Answer
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1 Answer
1
active
oldest
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oldest
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active
oldest
votes
I have a function that must be called from a non-main thread.
Add the orientation as an argument to this function.
answered Nov 11 '18 at 13:33
messebmesseb
17118
Problem is there is a chain of functions and this one sits at the top of the stack, all these functions are called on secondary thread.
– Deepak Sharma
Nov 11 '18 at 15:46
1
Could you give a small code example? I can't imagine that it is not possible to inject a dependency. To accessUIApplication.shareddirectly is a little code smell. The easiest solution would be to create another global Object, where you set the orientation fromUIApplication.shared.statusBarOrientation
– messeb
Nov 11 '18 at 15:56
add a comment |
I have a function that must be called from a non-main thread.
Add the orientation as an argument to this function.
answered Nov 11 '18 at 13:33
messebmesseb
17118
Problem is there is a chain of functions and this one sits at the top of the stack, all these functions are called on secondary thread.
– Deepak Sharma
Nov 11 '18 at 15:46
1
Could you give a small code example? I can't imagine that it is not possible to inject a dependency. To accessUIApplication.shareddirectly is a little code smell. The easiest solution would be to create another global Object, where you set the orientation fromUIApplication.shared.statusBarOrientation
– messeb
Nov 11 '18 at 15:56
add a comment |
I have a function that must be called from a non-main thread.
Add the orientation as an argument to this function.
answered Nov 11 '18 at 13:33
messebmesseb
17118
I have a function that must be called from a non-main thread.
Add the orientation as an argument to this function.
answered Nov 11 '18 at 13:33
messebmesseb
17118
answered Nov 11 '18 at 13:33
messebmesseb
17118
answered Nov 11 '18 at 13:33
messebmesseb
17118
answered Nov 11 '18 at 13:33
messebmesseb
17118
17118
Problem is there is a chain of functions and this one sits at the top of the stack, all these functions are called on secondary thread.
– Deepak Sharma
Nov 11 '18 at 15:46
1
Could you give a small code example? I can't imagine that it is not possible to inject a dependency. To accessUIApplication.shareddirectly is a little code smell. The easiest solution would be to create another global Object, where you set the orientation fromUIApplication.shared.statusBarOrientation
– messeb
Nov 11 '18 at 15:56
add a comment |
Problem is there is a chain of functions and this one sits at the top of the stack, all these functions are called on secondary thread.
– Deepak Sharma
Nov 11 '18 at 15:46
1
Could you give a small code example? I can't imagine that it is not possible to inject a dependency. To accessUIApplication.shareddirectly is a little code smell. The easiest solution would be to create another global Object, where you set the orientation fromUIApplication.shared.statusBarOrientation
– messeb
Nov 11 '18 at 15:56
Problem is there is a chain of functions and this one sits at the top of the stack, all these functions are called on secondary thread.
– Deepak Sharma
Nov 11 '18 at 15:46
Problem is there is a chain of functions and this one sits at the top of the stack, all these functions are called on secondary thread.
– Deepak Sharma
Nov 11 '18 at 15:46
1
1
Could you give a small code example? I can't imagine that it is not possible to inject a dependency. To access
UIApplication.shared directly is a little code smell. The easiest solution would be to create another global Object, where you set the orientation from UIApplication.shared.statusBarOrientation– messeb
Nov 11 '18 at 15:56
Could you give a small code example? I can't imagine that it is not possible to inject a dependency. To access
UIApplication.shared directly is a little code smell. The easiest solution would be to create another global Object, where you set the orientation from UIApplication.shared.statusBarOrientation– messeb
Nov 11 '18 at 15:56
add a comment |
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