react-native - 如何在本机反应中将状态传递给静态导航？

Question

需要将状态传递给导航但this.state.不起作用，这是代码

      this.setState({
      demo:"some title"
    });
.....

 static navigationOptions = {
        headerRight:(<View>
          <Text>{this.state.demo}</Text>
                  </View>),
        };

标签： react-nativenavigation

Answer 1

尝试设置这样的参数：

componentWillMount() {
     const {setParams} = this.props.navigation;
     setParams({demotxt:this.state.demo});
}

..

static navigationOptions = ({ navigation  }) => {

       const {state} = navigation;
           return {
               headerRight: (<View>
                 <Text>{state.params.demotxt}</Text>
                         </View>)
           }

};