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react中怎么实现在一个组件展示时调用一个函数

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react中怎么实现在一个组件展示时调用一个函数

有个tab栏要求在切换时重新请求数据 ,现在采用的是把子组件的this传递到父组件中进行调用,想问一下react有没有类似onShow的钩子函数,能在组件展示时调用的


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  1. 把数据放到父组件，这样就能在tab-onChange的时候调用
  2. 用useRef拿到子组件的this,然后再调用

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