有没有办法检查Flutter video-player包中的VideoPlayerController是否已经被释放？

Question

在代码中的某一点上，我现在不再需要VideoPlayerController，但是我不确定是否已经释放了VideoPlayerController。目前，我调用了dispose()方法，但是当VideoPlayerController已经被释放时，就会抛出错误：

2021-04-08 23:35:07.602 1898-2090/com.learningleaflets.anatomyleaflet E/flutter: [ERROR:flutter/lib/ui/ui_dart_state.cc(186)] Unhandled Exception: A VideoPlayerController was used after being disposed.
    Once you have called dispose() on a VideoPlayerController, it can no longer be used.
    #0      ChangeNotifier._debugAssertNotDisposed.<anonymous closure> (package:flutter/src/foundation/change_notifier.dart:117:9)
    #1      ChangeNotifier._debugAssertNotDisposed (package:flutter/src/foundation/change_notifier.dart:123:6)
    #2      ChangeNotifier.dispose (package:flutter/src/foundation/change_notifier.dart:212:12)
    #3      VideoPlayerController.dispose (package:video_player/video_player.dart:383:11)
    <asynchronous suspension>

我不希望这个错误填满我的日志，那么有没有一种方法可以检查VideoPlayerController是否已经准备好避免对其调用dispose()？

Answer 1

使用try-catch块

try{
_videoController.dispose();
//Do something
}
catch(e){
//Do something
}