监听form的改变，刷新列表数据
computed: {
_searchForm () {
return JSON.parse(JSON.stringify(this.searchForm))
}
},
watch: {
_searchForm: {
handler: function (newVal, oldVal) {
if (newVal.pageNum !== 1 && newVal.pageNum === oldVal.pageNum) {
this.searchForm.pageNum = 1;
} else {
this.getTableData()
}
},
deep: true
}
},