MD_YOSwechat/pages/threadedTree/modules/popup/index.js

// pages/threadedTree/modules/popup/index.js
Component({
    /**
     * 组件的属性列表
     */
    properties: {
        sheetTitle: String
    },

    lifetimes: {
        ready: function () {
            const that = this;
            wx.getSystemInfo({
                success: (res => that.setData({
                    scrollHeight: res.windowHeight - 45
                }))
            });
        }
    },
    /**
     * 组件的初始数据
     */
    data: {
        scrollHeight: 0
    },

    /**
     * 组件的方法列表
     */
    methods: {
        /* 关闭弹窗 */
        sheetClose() {
            let pages = getCurrentPages(),
                prevPage = pages[pages.length - 1];
            prevPage.setData({
                sheetTitle: ""
            })
        },
    }
})