问题描述
在我们的Flutter应用程序中，内存泄漏和流没有关闭.我们将源代码追溯到以下代码:
In our Flutter application we have memory leaks and streams not being closed. We traced the source to code such as:
Rx.combineLatest(...).asBroadcastStream()
RxDart .combineLatest()的结果是单订阅流.添加.asBroadcastStream()可使流方便地用于我们的各种Flutter显示器.但是，当这些显示器关闭时，合并的流仍处于活动状态.
The result of RxDart .combineLatest() is a single-subscription stream. Adding .asBroadcastStream() makes the stream conveniently available to our various Flutter displays. However when these displays are closed the streams being combined are still active.
推荐答案
来自.asBroadcastStream()文档:
因此，根据设计，流一直存在到被明确取消为止.要在最后一个侦听器取消后取消订阅，请使用:
So by design the stream exists until explicitly cancelled. To cancel the subscription when the last listener cancels use:
Rx.combineLatest(...).asBroadcastStream( onCancel: (sub) => sub.cancel() )
Stream.asBroadcastStream-容易引起泄漏，这是什么?原理? #26686
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