transformations 是一个转化 ValueNotifier 的工具类，实现数据监听的流转
ValueNotifier<int> source = ValueNotifier(4);
var newValueNotifier = Transformations.map(source, (n) {
return "test$n";
});
newValueNotifier.addListener(() {
print("new value : ${newValueNotifier.value}");
});
source.value = 3;
source.value = 4;
source.value = 5;
请依赖github
transformations:
git:
url: https://github.com/frasker/transformations
ref: 1.0.0-alpha3