react native navigationOptions中不

static navigationOptions = ({ navigation, navigationOptions,screenProps }) => {

const { params } = navigation.state;

return {

tabBarVisible: true,

headerRight:(

navigation.state.params.navigatePress()}>

//this.order()

点餐

)

}

};

// 点击完成按钮

order = ()=> {

alert('haha');

}

componentDidMount() {

// 处理数据源

this.props.navigation.setParams({navigatePress:this.order})

}

方法二：

在最外部声明：

let that;

在class内部：

constructor(props){super(props);        that =this;

}

在const * = StackNavigation({})中：

static navigationOptions = ({ navigation, navigationOptions,screenProps }) => {

const { params } = navigation.state;

return {

tabBarVisible: true,

headerRight:(

that.order()}>

点餐

)

}

};

order = ()=> {

alert('haha');

}