angularJS中三种自定义service的方法

在angularjs中有三种方法实现自定义service

下面实例是用三种自定义的service方法实现数的平方

第一种：

var app = angular.module("app",[]);

    app.service("cubeService",function () {
        this.cube = function (a) {
            return a*a*a;
        }
    });

    app.controller("ctrl",function ($scope,cubeService) {
        $scope.num = 5;
        $scope.result = cubeService.cube($scope.num);

        $scope.cube = function () {
            $scope.result = cubeService.cube($scope.num);
        }
    })
           

第二种是用factory：

var app = angular.module("app",[]);

    //增加依赖注入
    app.value("cubeInput",2);  //设置初始值

    app.factory("mainService",function () {
        var factory = {};

        factory.cube = function (a,b,c) {
            return a*b*c;
        };

        return factory;
    });

    app.service("cubeService",function (mainService) {
        this.cube = function (a) {
            return mainService.cube(a,a,a);
        }
    });

    app.controller("ctrl",function ($scope,cubeService,cubeInput) {
        $scope.num = cubeInput;
        $scope.result = cubeService.cube($scope.num);

        $scope.cube = function () {
            $scope.result = cubeService.cube($scope.num);
        }
    });
           

第三种使用provider：

app.value("cubeInput",4);

    app.config(function ($provide) {
        $provide.provider("mainService",function () {
            this.$get = function () {
                var factory = {};

                factory.cube = function (a,b,c) {
                    return a*b*c;
                };

                return factory;
            }
        });
    });
    
    app.service("cubeServicc",function (mainService) {
        this.cube = function (a) {
            return mainService.cube(a,a,a);
        }
    });

    app.controller("ctrl",function ($scope,cubeInput,cubeServicc) {
        $scope.num = cubeInput;
        $scope.result = cubeServicc.cube($scope.num);

        $scope.cube = function () {
            $scope.result = cubeServicc.cube($scope.num);
        }
    })
           

源代码下载地址https://download.csdn.net/download/xiaorumo/10841059