将调度函数传递给另一个实例 属性 作为稍后执行的回调

pass dispatch function to another instance property as callback to execute later on

抱歉伪代码。认为问题可以这样理解。在可重现的示例中工作。

考虑以下伪代码:

Class 富:

let fooInstance = null
class Foo() {
    constructor(){
        fooInstance = this;
        this.fooCallback = null // property to assign callback
    }

    static getInstance() {
        return fooInstance
    }

    callbackExecutor() {
        if (this.fooCallback)  // callback always null here even the assignment is ok in the component
            this.fooCallback();
    }
}

React-redux 组件:

import { argumentFunc } from 'src/argumentFunc'
class MyComponent extends Component {
    constructor(props) { 
        ...
    }
    componentDidUpdate(prevProps, prevState) {
        const foo = Foo.getInstance()
        if (whateverCond) {
            // callback assignment to instance. this.props.argumentFunc() works if called here
            foo.fooCallback = this.props.argumentFunc(); 
        }
    }
}


...
const mapDispatchToProps = (dispatch) => ({
    argumentFunc: () => dispatch(argumentFunc()),
})

export default connect(mapStateToProps, mapDispatchToProps)(MyComponent)

我将回调分配给实例,但随后在callbackExecutor中,this.fooCallback为null。

我试过了:
foo = this.props.argumentFunc();
foo = this.props.argumentFunc;
foo = () => this.props.argumentFunc();
foo = () => this.props.argumentFunc;

如何将回调传递给实例 (fooInstance),以便稍后在 class 实例方法 (callbackExecutor()) 中调用?

你试过了吗:

foo.getInstance().fooCallback = this.props.argumentFunc.bind(this)