从角度引导中返回一个模态值

I'm trying to use the modal directive from Angular Bootstrap to pop up a dialog, change a value (that was passed in) and then retrieve it.

我正在尝试使用角引导中的模态指令弹出一个对话框，更改一个值(已传入)，然后检索它。

However, for some reason the value never gets updated in the scope. And, in fact, if I put in a "ng-change" and stick a breakpoint in it, it seems that there's another level of scope being created for some reason.

但是，由于某些原因，该值永远不会在范围内更新。事实上，如果我输入一个“ng-change”并在其中插入一个断点，那么由于某种原因，似乎还有另一个级别的范围被创建。

I've created a plunker here: http://plnkr.co/edit/Vy6gLgOJbWcLsHJtaGpV?p=preview

我在这里创建了一个柱塞器:http://plnkr.co/edit/vy6glgojbwclshjtagpv?

I'm baffled by this. Any ideas?

我被困惑。什么好主意吗?

1 个解决方案

#1

Javascript passes primitives (such as integer) by value. So when you return an integer from the resolve function, or accept it as a function argument, you're using a copy of the original integer. So then changing it (as you do in the popup) will have no effect on the original.

Javascript通过值传递原语(比如integer)。因此，当您从解析函数返回一个整数，或者接受它作为函数参数时，您使用的是原始整数的副本。然后改变它(正如你在弹出窗口中所做的那样)将不会对原始文件产生影响。

A solution to this is to use an object, and pass that around. e.g. instead of an integer 'hour', use an object time:

解决这个问题的方法是使用一个对象，并传递它。例如，使用对象时间而不是整数“小时”:

$scope.time = {
  hour: 12
};

and make sure you use it in the resolve object:

并确保在解析对象中使用它:

resolve : {
  time : function() {
    return $scope.time;
  }
}

You can see this at http://plnkr.co/edit/8YQGTn79AO4X7Tb7ann7?p=preview

您可以在http://plnkr.co/edit/8yqgtn79ao4x7tb7ann7?

Edit : Extracted from the plnkr

编辑:从plnkr中提取

    var testApp = angular.module('testApp', ['ui.bootstrap' ]);

    testApp.controller('UserDataCtrl',function ($scope, $modal) {
        $scope.time = {
          hour: 12
        };
        $scope.showPopup = function() {
            $modal.open({
                templateUrl : 'popup.html',
                controller : PopupCtrl,
                resolve : {
                    time : function() {
                        return $scope.time;
                    }
                }
            }).result.then(function(result) {
                $scope.hour = result;
            });
        };

    });

var PopupCtrl = function($scope, $modalInstance, $http, time) {
    $scope.level="PopupCtrl";

    $scope.possibleTimes= [0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23];

    $scope.time = time;

    $scope.ok = function() {
        $modalInstance.close($scope.hour);  
    };

    $scope.cancel = function() {
        $modalInstance.dismiss('cancel');
    };

    $scope.changing = function(){
        var x = 5;
    };

};

#1