我正在尝试更改状态挂钩，但出现此错误...我知道另一种更改方法，但它应该与传播语法一起使用，对吧？

export default function App() {
  const [state,setState] = {
    sld_url: "",geojson_url: "",}

  const handleSldUrlChange = event => {
    setState({...state,sld_url: event.target.value})
  }

  return (
    <TextField
     label="SLD URL"
     value={state.sld_url}
     classname={classes.textField}
     onChange={handleSldUrlChange}
     margin="normal"
     variant="outlined"
    />
  );
}