实例成员不可访问 [英] instance member is not accessible
本文介绍了实例成员不可访问的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
如何从堆栈导航器标头内部访问类函数?这可能吗?我想要实现的是在按下堆栈导航器标题时调用一个函数.
How can I access class functions from inside stack navigator header? Is this possible? What I'm trying to achieve is to call a function when I press the stack navigator header title.
class Dashboard extends React.Component {
static navigationOptions = ({ navigation }) => {
return {
headerTitle: (
<View style={header.addressView}>
<Text
style={header.titleAddress}
onPress={() => {
this._show().bind(this);
}}>
/>
</View>
),
};
};
_show(){
this.setState({ visibleModal: 1 })
}
constructor(props) {
super(props);
this.state = {
visibleModal: null,
};
}
render() {
...........
}
}
export default Dashboard;
推荐答案
class Dashboard extends React.Component {
static navigationOptions = ({ navigation }) => {
const showParams = navigation.getParam("show",()=>{});
//Access the params like this.
return {
headerTitle: (
<View style={header.addressView}>
<Text
style={header.titleAddress}
onPress={showParams}>
/>
</View>
),
};
};
_show(){
this.setState({ visibleModal: 1 })
}
//Too add this.
componentDidMount(){
this.props.navigation.setParams({show:()=>this._show()});
}
constructor(props) {
super(props);
this.state = {
visibleModal: null,
};
}
render() {
...........
}
}
export default Dashboard;
这是访问类中的变量或状态并使其可用于静态导航选项函数的方式.
This is how you access the variables or states inside a class and make it available for the static navigationOptions function.
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