![](/img/trans.png)
[英]How to pass parameters to function without calling function?
[英]How to pass function/closure without calling it?
我正在嘗試設置一個狀態,它恰好是 react-native 中的一個函數,如下所示:
...
setSendFunction(function () {
console.log('HELLO');
});
但是每次運行此行時,都會打印“HELLO”,這是我不想要的。 我只想將此匿名函數存儲在某處而不運行它。
正如@Bergi 所說,你想做類似的事情
import React, { useState } from "react";
export default function App() {
//here func() will give you the value of 5
const [func, setFunc] = useState(() => () => 5);
const handleClick = (num) => {
// after this, func() will provide new value, which is num
setFunc((prevState) => () => prevState() + num);
};
return (
<div>
<h2>{func()} </h2>
<button onClick={(e) => handleClick(10)}> Change State</button>
</div>
);
}
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.