var Test = React.createClass({

    componentDidMount: function(){
        var hammer = new Hammer(document.querySelector('button'));
        hammer.on("tap", function(e){
            console.log('111111111');
        });
    },

    render: function(){
        return (
            <p ref="hammer" style={{padding: '100px 0 0 100px'}}>
                <button>test</button>
            </p>
        )
    }
})

React.render(<Test />, document.body)

iOS中点击button，tap事件执行两次