微信小程序獲取地理位置受權

微信小程序獲取地理位置受權，首先須要在app.json中添加配置：

"permission": {
    "scope.userLocation": {
      "desc": "請確認受權"
    }
  }

獲取經緯度：若是手機未開啓位置信息，那麼受權成功後在wx.getLocation()方法中也會一直失敗，因此須要在fail方法中提示用戶開啓手機位置信息

getUserLocation: function () {
        let vm = this
        wx.getSetting({
            success: (res) => {
                // res.authSetting['scope.userLocation'] == undefined    表示 初始化進入該頁面
                // res.authSetting['scope.userLocation'] == false    表示 非初始化進入該頁面,且未受權
                // res.authSetting['scope.userLocation'] == true    表示 地理位置受權
                // 拒絕受權後再次進入從新受權
                if (res.authSetting['scope.userLocation'] != undefined && res.authSetting['scope.userLocation'] != true) {
                    // console.log('authSetting:status:拒絕受權後再次進入從新受權', res.authSetting['scope.userLocation'])
                    wx.showModal({
                        title: '',
                        content: '【泰福利Lite】須要獲取你的地理位置，請確認受權',
                        success: function (res) {
                            if (res.cancel) {
                                wx.showToast({
                                    title: '拒絕受權',
                                    icon: 'none'
                                })
                                setTimeout(() => {
                                    wx.navigateBack()
                                }, 1500)
                            } else if (res.confirm) {
                                wx.openSetting({
                                    success: function (dataAu) {
                                        // console.log('dataAu:success', dataAu)
                                        if (dataAu.authSetting["scope.userLocation"] == true) {
                                            //再次受權，調用wx.getLocation的API
                                            vm.getLocation(dataAu)
                                        } else {
                                            wx.showToast({
                                                title: '受權失敗',
                                                icon: 'none'
                                            })
                                            setTimeout(() => {
                                                wx.navigateBack()
                                            }, 1500)
                                        }
                                    }
                                })
                            }
                        }
                    })
                }
                // 初始化進入，未受權
                else if (res.authSetting['scope.userLocation'] == undefined) {
                    // console.log('authSetting:status:初始化進入，未受權', res.authSetting['scope.userLocation'])
                    //調用wx.getLocation的API
                    vm.getLocation(res)
                }
                // 已受權
                else if (res.authSetting['scope.userLocation']) {
                    // console.log('authSetting:status:已受權', res.authSetting['scope.userLocation'])
                    //調用wx.getLocation的API
                    vm.getLocation(res)
                }
            }
        })
    },
    // 微信得到經緯度
    getLocation: function (userLocation) {
        let vm = this
        wx.getLocation({
            type: "wgs84",
            success: function (res) {
                // console.log('getLocation:success', res)
                var latitude = res.latitude
                var longitude = res.longitude
                vm.getDaiShu(latitude, longitude)
            },
            fail: function (res) {
                // console.log('getLocation:fail', res)
                if (res.errMsg === 'getLocation:fail:auth denied') {
                    wx.showToast({
                        title: '拒絕受權',
                        icon: 'none'
                    })
                    setTimeout(() => {
                        wx.navigateBack()
                    }, 1500)
                    return
                }
                if (!userLocation || !userLocation.authSetting['scope.userLocation']) {
                    vm.getUserLocation()
                } else if (userLocation.authSetting['scope.userLocation']) {
                    wx.showModal({
                        title: '',
                        content: '請在系統設置中打開定位服務',
                        showCancel: false,
                        success: result => {
                            if (result.confirm) {
                                wx.navigateBack()
                            }
                        }
                    })
                } else {
                    wx.showToast({
                        title: '受權失敗',
                        icon: 'none'
                    })
                    setTimeout(() => {
                        wx.navigateBack()
                    }, 1500)
                }
            }
        })
    }