OnStateChanged Method in Flutter
In Flutter, is there a method like onStateChanged which is called when the state of the page changes?
setState(()
widget._loadCompleted = true;
widget._loading = false;
);
I'm trying to set the two bool values in setState() method. I'm setting states for several other reasons. So I want to know if the last state change was for this particular reason.
flutter state edited Nov 17 '18 at 8:08
CopsOnRoad
5,36922228
asked Nov 15 '18 at 7:16
Vishnu Maheswaran KVishnu Maheswaran K
1147
add a comment |
In Flutter, is there a method like onStateChanged which is called when the state of the page changes?
setState(()
widget._loadCompleted = true;
widget._loading = false;
);
I'm trying to set the two bool values in setState() method. I'm setting states for several other reasons. So I want to know if the last state change was for this particular reason.
flutter state edited Nov 17 '18 at 8:08
CopsOnRoad
5,36922228
asked Nov 15 '18 at 7:16
Vishnu Maheswaran KVishnu Maheswaran K
1147
How wouldonStateChangedhelp? There is no such thing anyway.
– Günter Zöchbauer
Nov 15 '18 at 7:21
@Vishnu I edited my answer with code, did that help you?
– CopsOnRoad
Nov 17 '18 at 5:58
add a comment |
In Flutter, is there a method like onStateChanged which is called when the state of the page changes?
setState(()
widget._loadCompleted = true;
widget._loading = false;
);
I'm trying to set the two bool values in setState() method. I'm setting states for several other reasons. So I want to know if the last state change was for this particular reason.
flutter state edited Nov 17 '18 at 8:08
CopsOnRoad
5,36922228
asked Nov 15 '18 at 7:16
Vishnu Maheswaran KVishnu Maheswaran K
1147
In Flutter, is there a method like onStateChanged which is called when the state of the page changes?
setState(()
widget._loadCompleted = true;
widget._loading = false;
);
I'm trying to set the two bool values in setState() method. I'm setting states for several other reasons. So I want to know if the last state change was for this particular reason.
flutter state flutter state edited Nov 17 '18 at 8:08
CopsOnRoad
5,36922228
asked Nov 15 '18 at 7:16
Vishnu Maheswaran KVishnu Maheswaran K
1147
edited Nov 17 '18 at 8:08
CopsOnRoad
5,36922228
asked Nov 15 '18 at 7:16
Vishnu Maheswaran KVishnu Maheswaran K
1147
edited Nov 17 '18 at 8:08
CopsOnRoad
5,36922228
edited Nov 17 '18 at 8:08
CopsOnRoad
5,36922228
edited Nov 17 '18 at 8:08
CopsOnRoad
5,36922228
5,36922228
asked Nov 15 '18 at 7:16
Vishnu Maheswaran KVishnu Maheswaran K
1147
asked Nov 15 '18 at 7:16
Vishnu Maheswaran KVishnu Maheswaran K
1147
asked Nov 15 '18 at 7:16
Vishnu Maheswaran KVishnu Maheswaran K
1147
1147
How wouldonStateChangedhelp? There is no such thing anyway.
– Günter Zöchbauer
Nov 15 '18 at 7:21
@Vishnu I edited my answer with code, did that help you?
– CopsOnRoad
Nov 17 '18 at 5:58
add a comment |
How wouldonStateChangedhelp? There is no such thing anyway.
– Günter Zöchbauer
Nov 15 '18 at 7:21
@Vishnu I edited my answer with code, did that help you?
– CopsOnRoad
Nov 17 '18 at 5:58
How would
onStateChanged help? There is no such thing anyway.– Günter Zöchbauer
Nov 15 '18 at 7:21
How would
onStateChanged help? There is no such thing anyway.– Günter Zöchbauer
Nov 15 '18 at 7:21
@Vishnu I edited my answer with code, did that help you?
– CopsOnRoad
Nov 17 '18 at 5:58
@Vishnu I edited my answer with code, did that help you?
– CopsOnRoad
Nov 17 '18 at 5:58
add a comment |
1 Answer
1
active
oldest
votes
As Günter mentioned, there is no such thing like onStateChanged(). You have to deal it in build() method.
If I got you right, you can use like this:
class _MyAppState extends State<MyApp>
bool myFlag = false; // initially set to false
void _doYourWork()
setState(() => myFlag = true); // set to true here
@override
Widget build(BuildContext context)
if (myFlag)
// setState() just got called
else
// we are building fresh for the first time.
myFlag = false;
return yourWidget();
After this build() will receive myFlag value to true and it can then set to false again. So, you can do this trick.
answered Nov 15 '18 at 8:19
CopsOnRoadCopsOnRoad
5,36922228
add a comment |
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1 Answer
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active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
As Günter mentioned, there is no such thing like onStateChanged(). You have to deal it in build() method.
If I got you right, you can use like this:
class _MyAppState extends State<MyApp>
bool myFlag = false; // initially set to false
void _doYourWork()
setState(() => myFlag = true); // set to true here
@override
Widget build(BuildContext context)
if (myFlag)
// setState() just got called
else
// we are building fresh for the first time.
myFlag = false;
return yourWidget();
After this build() will receive myFlag value to true and it can then set to false again. So, you can do this trick.
answered Nov 15 '18 at 8:19
CopsOnRoadCopsOnRoad
5,36922228
add a comment |
As Günter mentioned, there is no such thing like onStateChanged(). You have to deal it in build() method.
If I got you right, you can use like this:
class _MyAppState extends State<MyApp>
bool myFlag = false; // initially set to false
void _doYourWork()
setState(() => myFlag = true); // set to true here
@override
Widget build(BuildContext context)
if (myFlag)
// setState() just got called
else
// we are building fresh for the first time.
myFlag = false;
return yourWidget();
After this build() will receive myFlag value to true and it can then set to false again. So, you can do this trick.
answered Nov 15 '18 at 8:19
CopsOnRoadCopsOnRoad
5,36922228
add a comment |
As Günter mentioned, there is no such thing like onStateChanged(). You have to deal it in build() method.
If I got you right, you can use like this:
class _MyAppState extends State<MyApp>
bool myFlag = false; // initially set to false
void _doYourWork()
setState(() => myFlag = true); // set to true here
@override
Widget build(BuildContext context)
if (myFlag)
// setState() just got called
else
// we are building fresh for the first time.
myFlag = false;
return yourWidget();
After this build() will receive myFlag value to true and it can then set to false again. So, you can do this trick.
answered Nov 15 '18 at 8:19
CopsOnRoadCopsOnRoad
5,36922228
As Günter mentioned, there is no such thing like onStateChanged(). You have to deal it in build() method.
If I got you right, you can use like this:
class _MyAppState extends State<MyApp>
bool myFlag = false; // initially set to false
void _doYourWork()
setState(() => myFlag = true); // set to true here
@override
Widget build(BuildContext context)
if (myFlag)
// setState() just got called
else
// we are building fresh for the first time.
myFlag = false;
return yourWidget();
After this build() will receive myFlag value to true and it can then set to false again. So, you can do this trick.
answered Nov 15 '18 at 8:19
CopsOnRoadCopsOnRoad
5,36922228
edited Nov 15 '18 at 14:17
answered Nov 15 '18 at 8:19
CopsOnRoadCopsOnRoad
5,36922228
answered Nov 15 '18 at 8:19
CopsOnRoadCopsOnRoad
5,36922228
answered Nov 15 '18 at 8:19
CopsOnRoadCopsOnRoad
5,36922228
5,36922228
add a comment |
add a comment |
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How would
onStateChangedhelp? There is no such thing anyway.– Günter Zöchbauer
Nov 15 '18 at 7:21
@Vishnu I edited my answer with code, did that help you?
– CopsOnRoad
Nov 17 '18 at 5:58