uniapp 返回上一步携带参数

1. 下一步

   // 返回上一页
   setTimeout(() => {
   let pages = getCurrentPages();
   let prevPage = pages[pages.length - 2];
   prevPage.$vm.schoolName = this.formList;
   uni.navigateBack({
   delta: 1
   });
   }, 1000)

2. 返回上一步, 携带参数

    	// 获取下一步返回的数据
    	onShow() {
    		 let pages = getCurrentPages();
    		    if (pages[pages.length - 1].$vm.schoolName) {
    		        this.schoolName = pages[pages.length - 1].$vm.schoolName
    				console.log(this.schoolName)
    		    }
    	},