ionic定位，签到

定位，签到，转换坐标系

cordova-plugin-geolocation      geolocation插件

1 安装插件 

cordova plugin add cordova-plugin-geolocation

2 点击定位

<button ng-click="getGeolocation()">定位当前</button>

```

$scope.getGps=function(){

    $cordovaGeolocation.getCurrentPosition().then(function (position) {

          $scope.lat  = position.coords.latitude;

          $scope.lon = position.coords.longitude;

          $http.jsonp("http://api.map.baidu.com/geocoder/v2/?callback=JSON_CALLBACK&mcode=com.xxxxx.-&location="+$scope.lat+","+$scope.lon+"&output=json&pois=1&ak=ysHscdqZCVZXG4ipXgXou2Wt")

  .success(function(data){

  　　 $scope.formatted_address=data.result.formatted_address;

  $scope.sematic_description=data.result.sematic_description;

  console.log(data)

　　})

        }, function(err) {

            // error

        });

}

```

签到功能：谷歌和百度地图利用的坐标系不一样，需要转换坐标系

```

// 签到功能

    $scope.getGps=function(){

    var posOptions = {timeout: 10000,maximumAge: 30000, enableHighAccuracy: true,coorType: 'bd09ll'};

  $cordovaGeolocation.getCurrentPosition(posOptions).then(function (position) {

          $scope.lat  = position.coords.latitude;

          $scope.lon = position.coords.longitude;

          bd_encrypt($scope.lat, $scope.lon)

          $http.jsonp("http://api.map.baidu.com/geocoder/v2/?callback=JSON_CALLBACK&mcode=com.xxxxx.-&location="+$scope.lat+","+$scope.lon+"&output=json&pois=1&ak=ysHscdqZCVZXG4ipXgXou2Wt")

      .success(function(data){

  　　 $scope.formatted_address=data.result.formatted_address;

      $scope.sematic_description=data.result.sematic_description;

　  　})

        $.ajax({

        type:"post",

        url: loginIP + '/api/v1/lines',

// url:'/api/v1/lines',

        headers:{"Authentication-Token": sessionNews},

        data:{d_task_form_id:$scope.id,long_login:$scope.lon,lat_login:$scope.lat},

        success:function(data){

        console.log(data)

        if(data.status == '定位成功'){

        alert('签到成功')

        }else{

        alert('签到失败')

        }

        },

        error:function(err){

    $ionicLoading.hide()

        console.log(err)

        }

        });

    });

}

  // 谷歌转百度

    function bd_encrypt(gg_lon, gg_lat){ 

            var X_PI = Math.PI * 3000.0 / 180.0; 

            var x = gg_lon, y = gg_lat; 

            var z = Math.sqrt(x * x + y * y) + 0.00002 * Math.sin(y * X_PI); 

            var theta = Math.atan2(y, x) + 0.000003 * Math.cos(x * X_PI); 

            var bd_lon = z * Math.cos(theta) + 0.0065; 

            var bd_lat = z * Math.sin(theta) + 0.006; 

            return { 

                bd_lat: bd_lat, 

                bd_lon: bd_lon 

            }; 

      }

```