小程序通用权限接口获取信息方法

使用方法：
函数参数interfaceName指的是小程序的接口名称，如wx.getLocation,interfaceName指的就是getLocation，当获取权限成功时通过Promise resolve(res)返回，res为对应接口的返回值（获取值可能存在失败情况，需要自己判断），而无权获取信息时通过Promise reject(r)返回，可以做后续页面显示。

function getInterfaceInfo(interfaceName) {
  const authorizationMap = {
    'getUserInfo': 'scope.userInfo',
    'getLocation': 'scope.userLocation',
    'chooseLocation': 'scope.userLocation',
    'chooseAddress': 'scope.address',
    'chooseInvoiceTitle': 'scope.invoiceTitle',
    'chooseInvoice': 'scope.invoice',
    'getWeRunData': 'scope.werun',
    'startRecord': 'scope.record',
    'saveImageToPhotosAlbum': 'scope.writePhotosAlbum',
    'saveVideoToPhotosAlbum': 'scope.writePhotosAlbum',
    'camera': 'scope.camera'
  }

  return new Promise((resolve, reject) => {
    const scopeName = authorizationMap[interfaceName]
    uni.getSetting({
      success: (res) => {
        console.log(`get user ${scopeName} setting:`, res)
        if (scopeName in res.authSetting) {
          // 判断用户是否已经有权限
          if (res.authSetting[scopeName]) {
            console.log('authorize result:', res)
            uni[interfaceName]({
              success: (res) => {
                console.log('get user setting data success:', res)
                resolve(res)
              },
              fail: (r) => {
                console.log('get user setting data fail:', res)
                resolve(r)
              }
            })
          } else {
            reject(res)
          }
        } else {
          uni.authorize({
            scope: scopeName,
            success: (res) => {
              console.log('authorize result:', res)
              uni[interfaceName]({
                success: (res) => {
                  console.log('get user setting data success:', res)
                  resolve(res)
                },
                fail: (r) => {
                  console.log('get user setting data fail:', res)
                  resolve(r)
                }
              })
            },
            fail: (r) => {
              console.log('fail:', r)
              reject(r)
            }
          })
        }
      },
      fail: (r) => {
        reject(r)
      }
    })
  })
}