fix: 更正按钮点击时，UI DOM展示state不一致问题，正确渲染list的长度，补充TS参数类型的定义 #3
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xiaohuoni
reviewed
Jul 28, 2020
| export default ({ initNumber = 0 }: ItemProps) => { | ||
| // 2. setstate 需要驼峰标识 | ||
| const [state, setState] = useState(initNumber); | ||
| const [flag, setFlag] = useState(true); |
| style={{ fontSize: '30px' }} | ||
| onClick={() => { | ||
| setstate(state + 1) | ||
| layoutEmitter.emit({ state }); |
| onClick={() => { | ||
| setstate(state + 1) | ||
| layoutEmitter.emit({ state }); | ||
| setState(state => state + 1) |
| } | ||
| export default () => { | ||
| const [list, setList] = useState([]); | ||
| const [list, setList] = useState([] as Array<State>); |
| console.log(list); | ||
| setList(list); | ||
| // 4. list 为数组，引用数据类型，我们不能直接操作state要结构出来 | ||
| const listData = [...list] |
| this.subscriptions(val); | ||
| }; | ||
|
|
||
| useSubscription = (callback: Subscription<T>) => { |
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通过useEffect实现因为setState异步问题，不能把最新数据进行传递问题，补充TS参数的类型定义