React Native `npm start` 出现 watchman 错误

我第一次遇到这个问题：https://github.com/facebook/react-native/issues/10088

然后我按照这个解决方案来解决该问题：https://github.com/facebook/react-native/issues/910#issuecomment-94181845

现在当我进入npm start I get [sane] Warning: Lost connection to watchman, reconnecting..。有什么建议么？

更新：当我将 MacOS 更新到 MacOS Sierra 时，这种情况就开始发生。

Update: So I tried running react-native run-ios which opens a new console window and invokes npm start. Its still gives the [sane] Warning: Lost connection to watchman, reconnecting.. warnings but its builds the bundle. So watchman connection is getting broken in between. Here is the console screenshot:

我按照 David 提供的解决方案解决了这个问题，但我必须执行一些额外的步骤，因为我已经使用brew 安装了 watchman。以下是解决方案的命令列表：

删除watchman（由brew安装）：

$ brew install rmtree
$ brew rmtree watchman
$ sudo rm -rf /usr/local/var/run/watchman

手动安装 Watchman v4.7.0（归功于 David）：

$ git clone https://github.com/facebook/watchman.git
$ cd watchman
$ git checkout v4.7.0
$ ./autogen.sh
$ ./configure
$ make
$ sudo make install

chmod 您的用户的监视状态目录：

$ chmod 0700 /usr/local/var/run/watchman/<user>-state