Question

我写了一个工厂方法：

myApp.factory('GetUserCurrentLocationService', ['$q', function ($q) {
            var GetUserCurrentLocationService = {};
            GetUserCurrentLocationService.getLocation = function () {
                var def = $q.defer();
                if (navigator.geolocation) {
                    navigator.geolocation.getCurrentPosition(function (position) {
                        def.resolve(position);
                        return def.promise;
                    });
                }
            }
            return GetUserCurrentLocationService;
        }
    ]);

在控制器中我写道：

GetUserCurrentLocationService.getLocation().then(function(response){
        console.log(response);
    },function(error){
        console.log(error);
    })

但每当我运行时，我都会收到错误无法读取属性＆＃39;然后＆＃39;未定义的AngularJS

Answer 1

截至目前，您的工厂getLocation函数返回 undefined ，它未返回Promise，因此预计会出错。基本上你错放了return def.promise;声明。

GetUserCurrentLocationService.getLocation = function () {
    var def = $q.defer();
    if (navigator.geolocation) {
        navigator.geolocation.getCurrentPosition(function (position) {
            def.resolve(position);
        });         
    } else {
        //Also reject if navigator.geolocation is undefined
        def.reject({});
    }
    //Function should return promised
    return def.promise;
}

无法阅读财产＆＃39;然后＆＃39;未定义的AngularJS

1 个答案: