PushNotificationIOS.setApplicationIconBadgeNumber() doesn't work if the app is in background state.

[JulienUsson]

• Review the documentation: https://facebook.github.io/react-native
• Search for existing issues: https://github.com/facebook/react-native/issues
• Use the latest React Native release: https://github.com/facebook/react-native/releases

Environment

 React Native Environment Info:
    System:
      OS: macOS 10.14.2
      CPU: (4) x64 Intel(R) Core(TM) i5-7267U CPU @ 3.10GHz
      Memory: 40.18 MB / 8.00 GB
      Shell: 5.6.2 - /usr/local/bin/zsh
    Binaries:
      Node: 11.0.0 - ~/.nvm/versions/node/v11.0.0/bin/node
      Yarn: 1.12.1 - ~/.nvm/versions/node/v11.0.0/bin/yarn
      npm: 6.4.1 - ~/.nvm/versions/node/v11.0.0/bin/npm
      Watchman: 4.9.0 - /usr/local/bin/watchman
    SDKs:
      iOS SDK:
        Platforms: iOS 12.1, macOS 10.14, tvOS 12.1, watchOS 5.1
      Android SDK:
        API Levels: 23, 24, 25, 26, 27
        Build Tools: 23.0.1, 24.0.3, 25.0.2, 26.0.1, 26.0.2, 27.0.3
    IDEs:
      Xcode: 10.1/10B61 - /usr/bin/xcodebuild
    npmPackages:
      react: 16.6.3 => 16.6.3 
      react-native: 0.57.8 => 0.57.8 
    npmGlobalPackages:
      react-native-cli: 2.0.1

Description

PushNotificationIOS.setApplicationIconBadgeNumber() doesn't work on IOS if the app is in background state.

Reproducible Demo

import React, {Component} from 'react'
import {PushNotificationIOS, Text, View} from 'react-native'
import OneSignal from 'react-native-onesignal'

export default class App extends Component {
    state = {
        notification: null
    }

    componentDidMount() {
        OneSignal.init("token", {kOSSettingsKeyAutoPrompt: true})
        OneSignal.inFocusDisplaying(0)
        OneSignal.addEventListener('received', this.onReceived)
    }

    componentWillUnmount() {
        OneSignal.removeEventListener('received', this.onReceived)
    }

    onReceived = async notification => {
        PushNotificationIOS.setApplicationIconBadgeNumber(1)  // doesn't work in background
        this.setState({notification}) // work in background
    }

    render() {
        return (
            <View>
                <Text>{JSON.stringify(this.state.notification)}</Text>
            </View>
        )
    }
}
`
``

[cpojer]

This issue has been moved to react-native-push-notification/ios#5.

[nguyenvanphuc2203]

same issue!