javascript 使用 Angular 观察工厂变量
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/30596258/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
watch factory variable with Angular
提问by Pierolain
My single page application has 2 controllers : the first is for my main menu and the second is for the view. They share data with this factory
我的单页应用程序有 2 个控制器：第一个用于我的主菜单，第二个用于视图。他们与这家工厂共享数据
myApp.factory('MenuFactory', function(){
var factory = {
Monitor: "doneJob",
Control: "",
Report: "",
Display: "",
setMonitor: function(value){
factory.Monitor = value;
},
setControl: function(value){
factory.Control = value;
},
setReport: function(value){
factory.Report = value;
},
setDisplay: function(value){
factory.Display = value;
}
};
return factory;
});
I would like to watch change on factory.Control, but i can't make it works.
我想在 上观看更改factory.Control，但我无法使其正常工作。
When i try this:
当我尝试这个时：
$scope.$watch(function(){MenuFactory.Control}, function(NewValue, OldValue){
console.log(NewValue + ' ' + OldValue);
console.log(MenuFactory.Control);
}, true);
I get "undefined undefined" and "Process" in console. Is there any problem with my $watch implementation for this factory ?
我在控制台中得到“undefined undefined”和“Process”。这个工厂的 $watch 实现有什么问题吗？
回答by Pankaj Parkar
You had a wrong syntax. It should returnthe service variable MenuFactory.Control& also there is no need of truein the end as you don't have object to check object equality.
你的语法错误。它应该return是服务变量MenuFactory.Control，并且最终也不需要，true因为您没有对象来检查对象相等性。
Code
代码
$scope.$watch(function(){
return MenuFactory.Control;
}, function(newValue, oldValue){
console.log(newValue + ' ' + oldValue);
console.log(MenuFactory.Control);
});
