uniapp小程序vue2开发，传值event接收找不到this

先上代码

//父组件
methods:{
postChildren(){
uni.navigateTo({
url:'/pages/work/err',
events:{
feedback(data){
console.log(data)
//这里拿不到this.也就是说，从子组件back回来之后this不见了，猜测是随着子组件一起销毁了
log('this',this)
}
})
}}

优化

//父组件
methods:{
postChildren(){
//将this赋值给that，能实现拿到页面的this
let that = this
uni.navigateTo({
url:'/pages/work/err',
events:{
feedback(data){
console.log(data)
//这里拿到了that
log('that',that)
}
})
}}