小程序右上角的小圆圈和三个点的位置获取

const systemInfo = wx.getSystemInfoSync()

Page({
  data: {
    statusBarStyle: '',
    navigationBarStyle: '',
    navigationStyle: '',
    menuStyle: ''
  },
  onLoad () {
    this.setData({
      statusBarStyle: this.getStatusBarStyle(),
      navigationBarStyle: this.getNavigationBarStyle(),
      navigationStyle: this.getNavigationStyle(),
      menuStyle: this.getMenuStyle()
    })
  },
  /**
   * 获取胶囊按钮位置，获取的单位是px
   */
  getMenuPosition () {
    let top = 4
    let right = 7
    let width = 87
    let height = 32
    if (systemInfo.platform === 'devtools' && systemInfo.system.indexOf('Android') === -1) {
      top = 6
      right = 10
    }
    else if (systemInfo.platform === 'devtools' && systemInfo.system.indexOf('Android') != -1) {
      top = 8
      right = 10
    }
    else if (systemInfo.system.indexOf('Android') != -1) {
      top = 8
      right = 10
      width = 95
    }
    return {
      top: systemInfo.statusBarHeight + top,
      left: systemInfo.windowWidth - width - right,
      width: width,
      height: height
    }
  },
  /**
   * 获取状态栏样式
   */
  getStatusBarStyle () {
    let statusBarPosition = {
      top: 0,
      left: 0,
      width: systemInfo.windowWidth,
      height: systemInfo.statusBarHeight
    }
    return this.formatStyle(statusBarPosition)
  },
  /**
   * 获取导航栏样式
   */
  getNavigationBarStyle () {
    let menuPosition = this.getMenuPosition()
    let navigationBarPosition = {
      top: systemInfo.statusBarHeight,
      left: 0,
      width: systemInfo.windowWidth,
      height: (menuPosition.top - systemInfo.statusBarHeight) * 2 + menuPosition.height
    }
    return this.formatStyle(navigationBarPosition)
  },
  /**
   * 获取导航样式
   */
  getNavigationStyle () {
    let menuPosition = this.getMenuPosition()
    let padding = systemInfo.windowWidth - menuPosition.left - menuPosition.width
    let navigationPosition = {
      top: menuPosition.top,
      left: padding,
      width: systemInfo.windowWidth - padding * 3 - menuPosition.width,
      height: menuPosition.height
    }
    return this.formatStyle(navigationPosition)
  },
  /**
   * 获取胶囊按钮样式
   */
  getMenuStyle() {
    return this.formatStyle(this.getMenuPosition())
  },
  /**
   * 格式化Style
   */
  formatStyle (position) {
    let styles = []
    for (let key in position) {
      styles.push(`${key}: ${position[key]}px;`)
    }
    return styles.join(' ')
  }
})