angularJS scope.$watch 整个对象

Question

是否可以在 angularJS 中观看整个对象？

我创建了一个 plunker 来向您展示我的意思： http://plnkr.co/edit/QxLzbwKkJ5k50DiP8OP1

当我更改 R G 或 B 值时，颜色对象不会触发更改事件，只有 R G 或 B 值会触发。我可以自己触发一个事件，以便我知道整个对象都发生了变化吗？

除了plunker之外还有代码：

function ColorObject()
{
    this.r = 0;
    this.g = 0;
    this.b = 0;

    this.c = 0;
    this.m = 0;
    this.y = 0;
    this.k = 0;

    this.hex = "#ff0000";
    this.oppositeHex = "#00ffff";
}

var chColorChanger = angular.module('chColorChanger',[]);

chColorChanger.controller('chColorChangerCtrl', function ($scope,$document,$element) 
{     
    $scope.colors = new ColorObject();
    $scope.gMessage = 0;
    $scope.message = 'scope initialized';
});

chColorChanger.directive('chColorValue',['$document',function($document) {
    return {
        link: function (scope, elem, attrs) {

            scope.$watch('colors',function(newValue,oldValue){
               scope.gMessage++;
            });

            scope.$watch('colors.r', function (newValue,oldValue) {
                scope.message = 'r changed';
            });

            scope.$watch('colors.g', function (newValue,oldValue) {
                scope.message = 'g changed';
            });

            scope.$watch('colors.b', function (newValue,oldValue) {
                scope.message = 'b changed';
            });
        }
    }
}]);

Answer 1

要观察整个物体，需要用到deep watch。这需要第三个参数来观察，因为 true...

        scope.$watch('colors',function(newValue,oldValue){
           scope.gMessage++;
        }, true);

检查此更新plunker link

angularJS scope.$watch 整个对象

angularJS scope.$watch whole object

javascript

angularjs

angularjs-directive

angularjs-scope