react native navigation

1.正向传值以及配置callback

this.props.navigation.navigate('ChoosePersonActivity', {
data: '1', choosed: nowFuZePerson, callback: (backdata) => {
Alert.alert(backdata);
}
});

2.第二个页面收到数据并返回数据

this.props.navigation.state.params.data
this.props.navigation.state.params.choosed

返回的方法：调用如下

    this.props.navigation.state.params.callback('返回的数据');
    this.props.navigation.goBack();