我使用react-native-router-flux作为react-native路由器,在我的情况下,当用户注销时,我使用Action.reset(“ key”),但是getDerivedStateFromProps
{{1 }}尚有预先数据,谁能告诉我原因,或如何使用其他方法解决问题。
答案 0 :(得分:1)
react-native-router-flux基于react-navigaion。所以我们可以找到概念和解释。
首先我们看到源js代码,它位于navigationStore中
reset = (routeName, data) => {
const params = filterParam(data);
const parent = getParent(this.state, routeName);
this.dispatch(
StackActions.reset({
index: 0,
key: parent ? parent.key : null,
actions: [
NavigationActions.navigate({
routeName,
params,
}),
],
}),
);
};
}
仅StackActions.reset
重置操作会擦除整个导航状态,并将其替换为多个操作的结果。因此它只会更改导航状态。我们可以在反应导航api中看到这一点。
并且对于导航生命周期,与Web不同,导航不会重新安装组件。它管理路由器使用堆栈。以下是官方的说法:
Consider a stack navigator with screens A and B. After navigating to A, its componentDidMount is called. When pushing B, its componentDidMount is also called, but A remains mounted on the stack and its componentWillUnmount is therefore not called.
When going back from B to A, componentWillUnmount of B is called, but componentDidMount of A is not because A remained mounted the whole time.
因此,当从路由器堆栈中卸下组件(如返回,重置)时,导航将卸载该组件