javascript - react 箭头功能组件-setState未定义

我正在尝试在箭头功能组件中设置setState，但出现错误“未定义setState”。

我尝试使用setState({ selectedSlot })和this.setState({ selectedSlot })在handleChange中设置状态，但没有任何效果。

 const AddAssetActivity = props => {
 let { variations, slots, priceStructure } = props;

 let state = {
   selectedSlot: { "0": "00", "1": "11" },
   cal: 1
 };

 let handleChange = (event, value) => {
   let selectedSlot = state.selectedSlot;
   selectedSlot[value.variation] = value.slot;
   setState({ selectedSlot });
 };

 return (
   <div>

   </div>
 );
};

最佳答案

要在功能组件内部实现状态逻辑，请使用hooks:

 const AddAssetActivity = props => {
 let { variations, slots, priceStructure } = props;

 const [state, setState] = React.useState({
   selectedSlot: { "0": "00", "1": "11" },
   cal: 1
 })


 let handleChange = (event, value) => {
   const _state = {...state}
   let selectedSlot = _state.selectedSlot;
   selectedSlot[value.variation] = value.slot;
   setState({ ..._state, selectedSlot });
 };

 return (
   <div>

   </div>
 );
};