dart callback function with parameter
class Obj {
// <returnType> Function(<parameters>) fName;
String Function(String, int, etc...) callbackName;
// Call the callback function somewhere, eg constructor, textfield etc.
Obj(this.callbackName);
}
main() {
// Use the callback
var myObj = Obj((String p1, int p2, etc...) {
return "$p1$p2";
});
}flutter use valuechanged function in function
class 1{
//in the class where you need to use the callback declare as field
Function(String value) onChanged,
//then use the function as inChanged callback eventually adding code
TextField(
onChanged: (value){
onChanged(value);
state.didChange(value);
},
)
}
//in the other class pass the function like this
class 2{
new 1({
...
onChanged: (value) {
restaurant.name = value;
},
...
});
}Copyright © 2021 Codeinu
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