我创建了一个全局的函数文件，

export default {
install: function (Vue) {
Vue.prototype.pageSize = 10;
Vue.prototype.total = 0;
Vue.prototype.page = 1;
Vue.prototype.filterData = {};
Vue.prototype.model = [];

    Vue.prototype.searchSubmit = function (e) {
        this.filterData = e;
        for (let k in e) {
            if (k != "newOrderBy" && k != "isAsc" && k != "orderBy") {
                this.$set(this.filterData, k, e[k]);
            }
        }
        this.page = 1;
        this.loadData();
    };

当我在vue组件上调用的时候
<Search :filters=“filterData”
[@searchSubmit](/user/searchSubmit)=“searchSubmit”>

this = null。问题是 我怎么取得当前的vue对象