在堆栈弹出时反应本机路由通量重新渲染组件 [英] react native route flux re-render component on stack pop

问题描述

您如何重新运行 React 组件生命周期方法以确定在使用 反应本机路由器通量?

场景:场景A -> B -> A假设 A 是初始场景，我们通过 push 即 Actions.SceneB 从 A 导航到 B.从 B 到 A，伴随着 Pop.当堆栈弹出以显示场景 A 时，不会为场景 A 调用任何 React 组件方法.如何确定是否需要重新渲染?我搜索了 github repo 上列出的问题，许多似乎没有解决方案的问题.这个问题是如何解决的?

How do you re-run React Component Lifecycle methods to determine if a re-render is necessary when transitioning back to previous screens from stack using React Native Router Flux?

Scenario: Scene A -> B -> A Lets say, A is the initial scene and we navigate from A to B with a push i.e Actions.SceneB. From B to A with a Pop. When the stack is popped to show Scene-A, none of the React Component methods are called for Scene-A. How do I determine if a re-render is necessary? I searched the Issues listed on the github repo and many seems to have this problem without a solution. How is this problem addressed?

我有一个用 setTimeout 调用 Actions.refresh() 的丑陋工作.

I have the ugly work around of calling Actions.refresh() with a setTimeout.

解决这个问题！这种解决方法似乎很棘手.必须有更好的方法来挂钩组件生命周期以确定是否需要重新渲染.也许回调到组件?

Work Around that works! This workaround seems to be hacky. There must be a better way to hook into component lifecycle to determine if a re-render is required. Perhaps a callback into the Component?

<TouchableHighlight underlayColor='#efefef' onPress={() => { Actions.pop(); setTimeout(()=> Actions.refresh(), 500)}} style={styles.cancel}>

不起作用的选项

Actions.pop({type: 'reset'})

          OR

Actions.refresh({"key" : "sceneA"})

推荐答案

解决这个问题！这种解决方法似乎很棘手.必须有更好的方法来挂钩组件生命周期以确定是否需要重新渲染.

Work Around that works! This workaround seems to be hacky. There must be a better way to hook into component lifecycle to determine if a re-render is required.

<TouchableHighlight underlayColor='#efefef' onPress={() => { Actions.pop(); setTimeout(()=> Actions.refresh(), 500)}} style={styles.cancel}>

这将调用 shouldComponentUpdate() 方法，该方法提供一个选项来确定是否需要重新渲染.

This will call shouldComponentUpdate() method which gives an option to determine, if a re-render is required.

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