flutter_lifecycle_binding

Description:

flutter lifecycle binding

chinese readme
Aim #
bind future to State ,when state disposed ,all binded future will cancelled;
Usage: #

create BindingHelper instance

BindingHelper _helper = BindingHelper();
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bind future to BindingHelper

future.bindLifecycle(_helper).then((...))
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dispose BindingHelper when ui disposed (for example: state disposed)

@override
void dispose() {
super.dispose();
_helper.dispose();
}
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if you want use in State ,there is another mixin you can use.


add mixin on State
import 'package:lifecycle_binding/lifecycle_binding.dart';

class _State extends State with StateLifecycleBinding

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bind future to State


future.bindLifecycleToState(this).then((){...})
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Attention #
1.when use future like this:
future.then((){
//section 1
})
bindLifecycle(helper)
.then((){
//section 2
})
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section 1 will always run, section 2 will not run when state has disposed , so you should put ui releated code in section 2;
but
Full Example #

import 'package:flutter/material.dart';
import 'package:flutter_lifecycle_binding/lifecycle_binding.dart';

class StatePage extends StatefulWidget {
@override
State<StatefulWidget> createState() {
return _State();
}
}

class _State extends State {
String text = "如果5s内退出了页面，我不会被更新,也不会有日志打印";

BindingHelper _helper = BindingHelper();

@override
void initState() {
super.initState();
Future.delayed(const Duration(milliseconds: 5000), () {
return "我被更新了";
}).bindLifecycle(_helper).then((value) {
text = value;
print(text);
setState(() {});
});

}

@override
Widget build(BuildContext context) {
return Scaffold(appBar: AppBar(), body: Container(child: Text(text)));
}

@override
void dispose() {
super.dispose();
_helper.dispose();
}
}

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