Flutter: how do I either call a function inside a state class OR access a state class attribute?
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0
down vote
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From the StatefulWidget class, I want to call a function within the State class as such:
class Parent extends StatefulWidget{
// access _ParentState: iWantToAccessThis
// OR
// run from _ParentState: iWantToRunThis
@override
_ParentState createState() => new _ParentState();
}
class _ParentState extends State<Parent>{
List<Object> iWantToAccessThis;
void iWantToRunThis(){
// do something
}
...
}
UPDATE: found a work around by making my list a static list. Since there is going to always be one version of the list, this will work. However, I'd still like a proper answer for running functions within a state or accessing attributes that aren't lists or static (though I'm leaning towards it being impossible to access non-static attributes).
class Parent extends StatefulWidget{
static void _getList(){
_ParentState._iWantToAccessThis;
}
@override
_ParentState createState() => new _ParentState();
}
class _ParentState extends State<Parent>{
static List<Object> _iWantToAccessThis;
List<Object> get iWantToAccessThis => _iWantToAccessThis;
...
}
function
flutter state stateful asked Nov 12 at 4:31
Johnny Boy
865
add a comment |
up vote
0
down vote
favorite
From the StatefulWidget class, I want to call a function within the State class as such:
class Parent extends StatefulWidget{
// access _ParentState: iWantToAccessThis
// OR
// run from _ParentState: iWantToRunThis
@override
_ParentState createState() => new _ParentState();
}
class _ParentState extends State<Parent>{
List<Object> iWantToAccessThis;
void iWantToRunThis(){
// do something
}
...
}
UPDATE: found a work around by making my list a static list. Since there is going to always be one version of the list, this will work. However, I'd still like a proper answer for running functions within a state or accessing attributes that aren't lists or static (though I'm leaning towards it being impossible to access non-static attributes).
class Parent extends StatefulWidget{
static void _getList(){
_ParentState._iWantToAccessThis;
}
@override
_ParentState createState() => new _ParentState();
}
class _ParentState extends State<Parent>{
static List<Object> _iWantToAccessThis;
List<Object> get iWantToAccessThis => _iWantToAccessThis;
...
}
function
flutter state stateful asked Nov 12 at 4:31
Johnny Boy
865
2
That is purely impossible. The widget part cannot access its state
– Rémi Rousselet
Nov 12 at 4:34
1
Can you clarify why you want to do this? If you want to do some initialisation the state class has initState method.
– shaddy
Nov 12 at 5:51
add a comment |
up vote
0
down vote
favorite
up vote
0
down vote
favorite
From the StatefulWidget class, I want to call a function within the State class as such:
class Parent extends StatefulWidget{
// access _ParentState: iWantToAccessThis
// OR
// run from _ParentState: iWantToRunThis
@override
_ParentState createState() => new _ParentState();
}
class _ParentState extends State<Parent>{
List<Object> iWantToAccessThis;
void iWantToRunThis(){
// do something
}
...
}
UPDATE: found a work around by making my list a static list. Since there is going to always be one version of the list, this will work. However, I'd still like a proper answer for running functions within a state or accessing attributes that aren't lists or static (though I'm leaning towards it being impossible to access non-static attributes).
class Parent extends StatefulWidget{
static void _getList(){
_ParentState._iWantToAccessThis;
}
@override
_ParentState createState() => new _ParentState();
}
class _ParentState extends State<Parent>{
static List<Object> _iWantToAccessThis;
List<Object> get iWantToAccessThis => _iWantToAccessThis;
...
}
function
flutter state stateful asked Nov 12 at 4:31
Johnny Boy
865
From the StatefulWidget class, I want to call a function within the State class as such:
class Parent extends StatefulWidget{
// access _ParentState: iWantToAccessThis
// OR
// run from _ParentState: iWantToRunThis
@override
_ParentState createState() => new _ParentState();
}
class _ParentState extends State<Parent>{
List<Object> iWantToAccessThis;
void iWantToRunThis(){
// do something
}
...
}
UPDATE: found a work around by making my list a static list. Since there is going to always be one version of the list, this will work. However, I'd still like a proper answer for running functions within a state or accessing attributes that aren't lists or static (though I'm leaning towards it being impossible to access non-static attributes).
class Parent extends StatefulWidget{
static void _getList(){
_ParentState._iWantToAccessThis;
}
@override
_ParentState createState() => new _ParentState();
}
class _ParentState extends State<Parent>{
static List<Object> _iWantToAccessThis;
List<Object> get iWantToAccessThis => _iWantToAccessThis;
...
}
function
flutter state stateful function
flutter state stateful asked Nov 12 at 4:31
Johnny Boy
865
asked Nov 12 at 4:31
Johnny Boy
865
edited Nov 12 at 4:56
asked Nov 12 at 4:31
Johnny Boy
865
asked Nov 12 at 4:31
Johnny Boy
865
asked Nov 12 at 4:31
Johnny Boy
865
865
2
That is purely impossible. The widget part cannot access its state
– Rémi Rousselet
Nov 12 at 4:34
1
Can you clarify why you want to do this? If you want to do some initialisation the state class has initState method.
– shaddy
Nov 12 at 5:51
add a comment |
2
That is purely impossible. The widget part cannot access its state
– Rémi Rousselet
Nov 12 at 4:34
1
Can you clarify why you want to do this? If you want to do some initialisation the state class has initState method.
– shaddy
Nov 12 at 5:51
2
2
That is purely impossible. The widget part cannot access its state
– Rémi Rousselet
Nov 12 at 4:34
That is purely impossible. The widget part cannot access its state
– Rémi Rousselet
Nov 12 at 4:34
1
1
Can you clarify why you want to do this? If you want to do some initialisation the state class has initState method.
– shaddy
Nov 12 at 5:51
Can you clarify why you want to do this? If you want to do some initialisation the state class has initState method.
– shaddy
Nov 12 at 5:51
add a comment |
1 Answer
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up vote
0
down vote
You can simply do this, but I wouldn't recommend it
class _MyWidget extends StatefulWidget {
State state;
@override
State<StatefulWidget> createState() {
state = _MyWidgetState();
return state;
}
}
I think there can be another ways to solve your problem, then access to state from widget
answered Nov 12 at 8:07
Andrey Turkovsky
1,8351618
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
0
down vote
You can simply do this, but I wouldn't recommend it
class _MyWidget extends StatefulWidget {
State state;
@override
State<StatefulWidget> createState() {
state = _MyWidgetState();
return state;
}
}
I think there can be another ways to solve your problem, then access to state from widget
answered Nov 12 at 8:07
Andrey Turkovsky
1,8351618
add a comment |
up vote
0
down vote
You can simply do this, but I wouldn't recommend it
class _MyWidget extends StatefulWidget {
State state;
@override
State<StatefulWidget> createState() {
state = _MyWidgetState();
return state;
}
}
I think there can be another ways to solve your problem, then access to state from widget
answered Nov 12 at 8:07
Andrey Turkovsky
1,8351618
add a comment |
up vote
0
down vote
up vote
0
down vote
You can simply do this, but I wouldn't recommend it
class _MyWidget extends StatefulWidget {
State state;
@override
State<StatefulWidget> createState() {
state = _MyWidgetState();
return state;
}
}
I think there can be another ways to solve your problem, then access to state from widget
answered Nov 12 at 8:07
Andrey Turkovsky
1,8351618
You can simply do this, but I wouldn't recommend it
class _MyWidget extends StatefulWidget {
State state;
@override
State<StatefulWidget> createState() {
state = _MyWidgetState();
return state;
}
}
I think there can be another ways to solve your problem, then access to state from widget
answered Nov 12 at 8:07
Andrey Turkovsky
1,8351618
answered Nov 12 at 8:07
Andrey Turkovsky
1,8351618
answered Nov 12 at 8:07
Andrey Turkovsky
1,8351618
answered Nov 12 at 8:07
Andrey Turkovsky
1,8351618
1,8351618
add a comment |
add a comment |
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2
That is purely impossible. The widget part cannot access its state
– Rémi Rousselet
Nov 12 at 4:34
1
Can you clarify why you want to do this? If you want to do some initialisation the state class has initState method.
– shaddy
Nov 12 at 5:51