此功能已于 8 月 9 日合并到 expo。 您需要将这些指令添加到 app.json

{
  "androidNavigationBar": {
     /*
        Determines to show or hide bottom navigation bar.
        "true" to show, "false" to hide.
        If set to false, status bar will also be hide. As it's a general rule to hide both status bar and navigation bar on Android developer official docs.
      */
    "visible": BOOLEAN,
    /*
      Configure the navigation bar icons to have light or dark color.
      Valid values: "light-content", "dark-content".
    */
    "barStyle": STRING,

    /*
      Configuration for android navigation bar.
      6 character long hex color string, eg: "#000000"
    */
    "backgroundColor": STRING
  }
}

以下是包含更多信息的拉取请求 https://github.com/expo/expo/pull/5280

因此，现在您可以随时更改 NavigationBar 的颜色。

Expo 发布了一个软件包 - expo-navigation-bar

只需安装它

expo install expo-navigation-bar

用法在文档 这里 中得到了很好的解释

要更改导航栏颜色，只需运行

NavigationBar.setBackgroundColorAsync("white");

您是否安装了“react-native-navigation-bar-color”？

如果没有

1. npm install react-native-navigation-bar-color --save

2. react-native link react-native-navigation-bar-color

并且

您是否从“react-native-navigation-bar-color”导入了 changeNavigationBarColor？

如果没有 import changeNavigationBarColor from 'react-native-navigation-bar-color';

或者

颜色名称不清楚。颜色示例

white : "#ffffff" , black : "#000000"

使用 reac-native-navigation-bar-color：

example = async () => {
      try{
        if (Platform.OS == 'android') {
          const response = await changeNavigationBarColor('#ffffff');
          console.log(response)// {success: true}
          }
      }catch(e){
          console.log(e)// {success: false}
      }

  };
...
<Button
          title="Set color white"
          onPress={() => {
            this.example();
          }}
        />

如果没有，我建议您尝试其他模块。 react-native-navbar-color

1. npm install --save react-native-navbar-color
2. react-native link react-native-navbar-color

Example.js

import NavigationBar from 'react-native-navbar-color'

export default class App extends Component {
    componentDidMount() {
        NavigationBar.setColor('#ffab8e')
    }
...

模块说明