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exports.install = function (Vue) {
// 把需要暴露出去的方法挂载到Vue原型上，避免了全局变量过多的问题
Vue.prototype.refreshData = function () {
console.log("刷新设备列表")
const component = findComponentDownward(this, 'Device')
console.log("component",component)
if(component){
component.getData()
}
}
}
/**
* 由一个组件，向下找到最近的指定组件
* @param {*} context 当前上下文，比如你要基于哪个组件来向上寻找，一般都是基于当前的组件，也就是传入 this
* @param {*} componentName 要找的组件的 name
*/
function findComponentDownward(context, componentName) {
const childrens = context.$children
let children = null
if (childrens.length) {
for (const child of childrens) {
const name = child.$options.name
if (name === componentName) {
children = child
break
} else {
children = findComponentDownward(child, componentName)
if (children) break
}
}
}
return children
}