使用这个试试

onLoad: function (options) {
    wx.startLocationUpdateBackground({
        type: 'gcj02',
        success(res) {
            console.log('updateBackground', res)
            var _locationChangeFn = function (res) {
                console.log('location change', res)
                
            }
            wx.onLocationChange(_locationChangeFn);
        }

    })
},