如何检查Flutter应用程序是否在调试中运行? [英] How to check flutter application is running in debug?

问题描述

我有一个简短的问题.我正在寻找一种在应用程序处于调试模式时在Flutter中执行代码的方法.在Flutter中有可能吗?我似乎在文档的任何地方都找不到它.

I have a short question. I'm looking for a way to execute code in Flutter when the app is in Debug mode. Is that possible in Flutter? I can't seem to find it anywhere in the documentation.

类似这样的东西

If(app.inDebugMode) {
   print("Print only in debug mode");
}

如何检查Flutter应用程序是否以调试或发布模式运行?

How to check if the flutter application is running in debug or release mode?

推荐答案

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虽然可行，但最好使用常量kReleaseMode或kDebugMode.请参阅下面的Rémi的答案以了解完整的解释，这应该是公认的问题.

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While this works, using constants kReleaseMode or kDebugMode is preferable. See Rémi's answer below for a full explanation, which should probably be the accepted question.

最简单的方法是使用assert，因为它仅在调试模式下运行.

The easiest way is to use assert as it only runs in debug mode.

这是Flutter的Navigator源代码中的一个示例:

Here's an example from Flutter's Navigator source code:

assert(() {
  if (navigator == null && !nullOk) {
    throw new FlutterError(
      'Navigator operation requested with a context that does not include a Navigator.\n'
      'The context used to push or pop routes from the Navigator must be that of a '
      'widget that is a descendant of a Navigator widget.'
    );
  }
  return true;
}());

请特别注意调用结束时的()-assert只能对布尔值进行操作，因此仅传入函数是行不通的.

Note in particular the () at the end of the call - assert can only operate on a boolean, so just passing in a function doesn't work.

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