用getCurrentPages来设置上一个页面的date时，wxml无法获取date？

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用getCurrentPages来设置上一个页面的date时，wxml无法获取date？When using getCurrentPages to set the date of the previous page, wxml cannot get the date?

let pages =  getCurrentPages()let prevPage = pages[pages.length-2]prevPage.data.arr.push('bbb')

For example, data in page a has a value arr: [], page a is navigator to page B, page B: let pages = getcurrentpages() let prevpage = pages[ pages.length -2] prevPage.data.arr . push ('bbb ') page B can directly update the appdata of page a without SetData, but wxml can't get the ARR data. Is that bug or the logic of small program design?

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