CODEWITHSUNDEEP
javascriptreactjsreact-nativeparent-child
user5932019
user5932019

Reputation:

react-Native: Access child component function inside parent component

Goal: Create a reusable OptionFan component that allows children as ChildButton components. Issue: unable to access ChildButton's method "flyOut()" inside OptionFan(parent) component method "showOptions()"

in Option Fan component:

 showOptions = () => {
        let animations = this.props.children.map((child, i) => {
            this.refs.child.flyOut();
        });
        Animated.stagger(this.props.staggerDelay, animations).start();
    }
    renderOptions = () => {
       return this.props.children.map((child, i) => {
           return <ChildButton ref={child} siblings={this.props.children.length} key={i} icon={} number={i} size={} />

       })
    }

in ChildButton component: 

componentDidMount() {
        this.props.ref(this);
    }

flyOut = () => {
        const {number, size} = this.state;
        let offset = this.findChildCoordinates(number);
        Animated.timing(
            this.state.move,
            {toValue: offset}
        ).start();
    }

the desired method is unaccessible in code-suggestions, what is incorrect in my approach?

Upvotes: 0

Views: 3080

Answers (1)

aravind_reddy
aravind_reddy

Reputation: 5496

You need bind them to your class. Change your optionFan Component like this:

Option Fan:

showOptions = () => {
    let animations = this.props.children.map((child, i) => {
        this.child.flyOut();
    });
    Animated.stagger(this.props.staggerDelay, animations).start();
}
renderOptions = () => {
   return this.props.children.map(i => {
       return <ChildButton ref={ Ref =>(this.child = Ref)} siblings={this.props.children.length} key={i} icon={} number={i} size={} />

   })
}

For more reference see this https://github.com/kriasoft/react-starter-kit/issues/909#issuecomment-252969542

Upvotes: 1

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