angular 更改显示与绑定数据格式转换

http://www.cnblogs.com/whitewolf/p/angular-input-box-format.html

    app.directive('numberConverter', function () {        return {            priority: 1,            restrict: 'A',            require: 'ngModel',            link: function (scope, element, attr, ngModel) {                function toModel(value) {                    return "" + value; // convert to string                }                function toView(value) {                    return parseInt(value); // convert to number                }                //显示到view 进行的操作                ngModel.$formatters.push(toView);                //传入到model 进行的操作                ngModel.$parsers.push(toModel);            }        };    });