试图将方法作为props传递给所有孩子。但是在控制台中打印子props时，它显示未定义。

控制台输出：

Object {openLightbox: undefined, closeLightbox: undefined, setLightboxState: undefined, key: 0}   

将 openLightbox、closeLightbox 和 setLightboxState 方法作为props传递给所有孩子。在变量 childProps 中设置它。

var Lightbox = React.createClass({

    getInitialState: function(){
        return { display: false };
    },

    componentWillMount: function(){
        if (this.props.data)
            this.setState(this.props.data);
    },

    openLightbox: function(){
        this.setState({display: true});
    },

    closeLightbox: function(){
        this.setState({display: false});
    },

    setLightboxState: function(obj){
        this.setState(obj);
    },

    render: function(){
        var childrenWithProps = this.props.children.map(function(child, i) {
            var childProps = {
                openLightbox: this.openLightbox,
                closeLightbox: this.closeLightbox,
                setLightboxState: this.setLightboxState,
                key: i
            };
            console.log(childProps)
            for (var j in this.state){
                childProps[j] = this.state[j];
            }

            var childWithProps = React.cloneElement(child, childProps);

            return childWithProps;
        });

        return (
            <div>
                {childrenWithProps}
            </div>
        );
    }
});