詳解reactnative頁面間傳遞數(shù)據(jù)的幾種方式

 componentDidMount() {
 // 利用DeviceEventEmitter 監(jiān)聽 concactAdd事件
  this.subscription = DeviceEventEmitter.addListener('concactAdd', (dic) => {// dic 為觸發(fā)事件回傳回來的數(shù)據(jù)
   // 接收到 update 頁發(fā)送的通知，后進行的操作內(nèi)容
   if (dic.approver_list) {
    this.setState((preState: Object) => {
     this.updateInputValue(preState.approver_list.concat(dic.approver_list), 'approver_list');
     return { approver_list: preState.approver_list.concat(dic.approver_list) };
    });
   }
   if (dic.observer_list) {
    this.setState((preState: Object) => {
     this.updateInputValue(preState.observer_list.concat(dic.observer_list), 'observer_list');
     return { observer_list: preState.observer_list.concat(dic.observer_list) };
    });
   }
  });
...
componentWillUnmount() {
  this.subscription.remove();
}

// 觸發(fā)concactAdd事件廣播
handleOk = (names: []) => {
  const { field } = this.props;
  DeviceEventEmitter.emit('concactAdd', { [field]: names });
 }

// 定義路由跳轉(zhuǎn)函數(shù) cb表示需要傳遞的回調(diào)函數(shù)
export const navigateToLinkman = (cb: Function, type?: string, mul?: boolean): NavigateAction =>
 NavigationActions.navigate({ routeName: 'Linkman', params: { cb, type, mul } });
 // 跳轉(zhuǎn)選擇人員頁面
  handleSelectUser = () => {
   Keyboard.dismiss();
   this.props.actions.navigateToLinkman(this.selectedUser, '', true);
...
// 選擇人員后的回調(diào)函數(shù)
selectedUser = (selectUser: string[]) => {
   this.setState((preState) => {
    const newEmails = preState.emails.concat(selectUser);
    const emails = [...new Set(newEmails)];
    return {
     emails,
    };
   });
  }

handleToUser = () => {
  ...
  navigation.state.params.cb(user.email, group);
  ...
}

componentDidMount() { 
this.props.navigation.addListener('didBlur', (payload) => {
     if (this.modalView) this.modalView.close();
    });
  }