函数包装方式的弹出框逻辑

selectUser.js

export default function (label = '加签'){
  let container = document.createElement('div')
  document.body.appendChild(container)
  let isDestroy = false;
  var instance = null;
  return new Promise(function(resolve, reject){
    function removeDom(){
      if(!isDestroy && instance){
        instance.setState({
          visible:false,
        })
        ReactDom.unmountComponentAtNode(container)
        container.parentNode.removeChild(container)
        isDestroy = true;
      }
    }
    function onOk(userCode){
      removeDom();
      resolve(userCode)
    }
    function onCancel(){
      removeDom();
      reject();
    }
    ReactDom.render(<Dialog label={label} onOk={onOk} onCancel={onCancel}/>, container, function(){
      instance = this
    })
  })
}