我尝试将 react-redux 与 typescript 结合使用，当我尝试使用 connect() 和 mapStateToProps 注入 props 时，出现了类型错误。

我的组件如下所示：

function mapStateToProps(state) {
    return {
        counter: state.counter
    };
}

function mapDispatchToProps(dispatch) {
    return {
        incr: () => {
            dispatch({type: 'INCR', by: 2});
        },
        decr: () => {
            dispatch({type: 'INCR', by: -1});
        }
    };
}




export default class Counter extends React.Component<HelloProps, any> {
    render() {
        return (
          <div>
              <p>
                  <label>Counter: </label>
                  <b>#{this.props.counter}</b>
              </p>
              <button onClick={e => this.props.incr() }>INCREMENT</button>
              <span style={{ padding: "0 5px" }}/>
              <button onClick={e => this.props.decr() }>DECREMENT</button>
        );
    }
}


export default connect(mapStateToProps, mapDispatchToProps)(Counter);

商店如下所示

let store = createStore(
    (state:HelloState, action:HelloAction) => {
        switch (action.type) {
            case 'INCR':
                return {counter: state.counter + action.by};
            default:
                return state;
        }
    },

最后，我将我的类型定义为：

interface HelloProps {
    counter?: number;
    incr?: () => any;
    decr?: () => any;
}

interface HelloState { 
    counter:number;
}

interface HelloAction { 
    type:string, 
    by:number;
}

当我尝试编译代码时，出现以下错误：

(39,61): error TS2345: Argument of type 'typeof Counter' is not assignable to parameter of type 'ComponentClass<{ counter: any; } & { incr: () => void; decr: () => void; }> | StatelessComponent<...'.
  Type 'typeof Counter' is not assignable to type 'StatelessComponent<{ counter: any; } & { incr: () => void; decr: () => void; }>'.
    Type 'typeof Counter' provides no match for the signature '(props?: { counter: any; } & { incr: () => void; decr: () => void; }, context?: any): ReactElement<any>' 

有趣的是，即使抛出类型错误，代码仍然有效。此外，将组件的 prop 接口更改为 any 也可以解决问题。似乎类型系统不理解这两个对象是由两个映射函数合并的。