我需要重新计算表单上的范围对象中的某些值。
所以我有:
$scope.submit = function() {
if ($scope.searchPlace) {
var address = $scope.searchPlace + ', ' $scope.land;
geocodeAddress(address, function(latLng){
angular.forEach($scope.places,function(value,key){
var distance = getDistance(value.latitude,value.longitude,latLng.lat(),latLng.lng())
value.distance = distance;
});
});
}
};
$ scope.places类似于[{'name':'plot_a','anding':0},{'name'':'plot_b','dange':0}]
,但我看不到前端范围对象的任何更改。我想念什么?
这是上面使用的两个功能
var getDistance = function(lat1,lon1,lat2,lon2) {
var R = 6371; // Radius of the earth in km
var dLat = deg2rad(lat2-lat1); // deg2rad below
var dLon = deg2rad(lon2-lon1);
var a =
Math.sin(dLat/2) * Math.sin(dLat/2) +
Math.cos(deg2rad(lat1)) * Math.cos(deg2rad(lat2)) *
Math.sin(dLon/2) * Math.sin(dLon/2)
;
var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a));
var d = R * c; // Distance in km
return d;
}
var geocodeAddress = function(address, callback) {
var geocoder = new google.maps.Geocoder();
geocoder.geocode( { 'address': address}, function(results, status) {
if (status == google.maps.GeocoderStatus.OK) {
callback(results[0].geometry.location);
} else {
console.log("Geocode was not successful for the following reason: " + status);
}
});
};
如果 getDistance
函数返回承诺,则应这样使用:
getDistance(value.latitude,value.longitude,latLng.lat(),latLng.lng()).then(function(response){
var distance = response.data;
value.distance = distance;
});