[关闭本地本机应用程序时如何从AsyncStorage中删除项目

Question

[关闭本地应用程序后如何从AsyncStorage中删除项目？

app.js：

componentDidMount() {
  AppState.addEventListener('change', this.handleAppStateChange);
}

componentWillUnmount() {
  AppState.removeEventListener('change', this.handleAppStateChange);
}

handleAppStateChange = (nextAppState) => {
  if (nextAppState === 'inactive') {
   AsyncStorage.removeItem('item');
  }    
}

Answer 1

我认为您的代码是正确的，只需要稍作调整：

state = {
    appState: AppState.currentState
}

componentDidMount() {
  AppState.addEventListener('change', this.handleAppStateChange);
}

componentWillUnmount() {
  AppState.removeEventListener('change', this.handleAppStateChange);
}

handleAppStateChange = (nextAppState) => {
  if (this.state.appState.match(/inactive|background/) && nextAppState === 'active') {
   AsyncStorage.removeItem('item');
  }    
}