在React Native中如何在静态方法内部访问'this'关键字？

Question

I am not able to access 'this' keyword in my static method in react- native, when I try to access it, it's thrown me error like 'this.setState not a function'.

Here is my code.

static getShiftStatus = () =>{
        //for check shift start or not  
        Usermodal.getShiftStatus((isStatus) =>{
            this.setState({isShiftStart: isStatus}) //error occure here.
            console.log(a.state.isShiftStart)
        }) 
    }

Answer 1

this in the inner function points to something else. You need to capture the this from the outside function.

static getShiftStatus = () =>{

        var that = this;  // capture here

        Usermodal.getShiftStatus((isStatus) =>{
            that.setState({isShiftStart: isStatus})  // use it here
            console.log(a.state.isShiftStart)
        }) 
    }