我有一个常见的角度服务和多个控制器。我的服务会收到服务器端发生的更改通知。 现在我希望服务通知控制器这个更改，以便我可以更新一些控制器属性。
我在服务中使用$rootscope.$broadcast，在控制器中使用$scope.$on来实现此目的。以这种方式实现它是一种很好的做法。
答案 0 :(得分：0)
首先，您必须了解我们必须使用$rootscope.broadcast的位置。
您可以直接$rootscope.$broadcast将服务直接inject到控制器中，而不是使用CREATE TABLE [Items](
[ItemId] [int] IDENTITY(1,1) NOT NULL,
[ParentId] [int] NULL,
[ItemName] [varchar](100) NOT NULL,
CONSTRAINT [PK_Items] PRIMARY KEY CLUSTERED
(
[ItemId] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
GO
CREATE TABLE [Transactions](
[TransactionId] [int] IDENTITY(1,1) NOT NULL,
[ItemId] [int] NOT NULL,
[Amount] [money] NOT NULL,
CONSTRAINT [PK_Transactions] PRIMARY KEY CLUSTERED
(
[TransactionId] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
GO
SET IDENTITY_INSERT [Items] ON
GO
INSERT [Items] ([ItemId], [ParentId], [ItemName]) VALUES (1, NULL, N'Warehouse')
GO
INSERT [Items] ([ItemId], [ParentId], [ItemName]) VALUES (3, 1, N'Bin 1')
GO
INSERT [Items] ([ItemId], [ParentId], [ItemName]) VALUES (4, 1, N'Bin 2')
GO
INSERT [Items] ([ItemId], [ParentId], [ItemName]) VALUES (5, 3, N'Item 1.1')
GO
INSERT [Items] ([ItemId], [ParentId], [ItemName]) VALUES (6, 3, N'Item 1.2')
GO
INSERT [Items] ([ItemId], [ParentId], [ItemName]) VALUES (7, 4, N'Item 2.1')
GO
INSERT [Items] ([ItemId], [ParentId], [ItemName]) VALUES (8, 4, N'Item 2.2')
GO
SET IDENTITY_INSERT [Items] OFF
GO
SET IDENTITY_INSERT [Transactions] ON
GO
INSERT [Transactions] ([TransactionId], [ItemId], [Amount]) VALUES (1, 5, 10.0000)
GO
INSERT [Transactions] ([TransactionId], [ItemId], [Amount]) VALUES (2, 5, 10.0000)
GO
INSERT [Transactions] ([TransactionId], [ItemId], [Amount]) VALUES (3, 6, 10.0000)
GO
INSERT [Transactions] ([TransactionId], [ItemId], [Amount]) VALUES (4, 6, 10.0000)
GO
INSERT [Transactions] ([TransactionId], [ItemId], [Amount]) VALUES (5, 4, 10.0000)
GO
INSERT [Transactions] ([TransactionId], [ItemId], [Amount]) VALUES (6, 7, 10.0000)
GO
INSERT [Transactions] ([TransactionId], [ItemId], [Amount]) VALUES (7, 7, 10.0000)
GO
INSERT [Transactions] ([TransactionId], [ItemId], [Amount]) VALUES (8, 8, 10.0000)
GO
INSERT [Transactions] ([TransactionId], [ItemId], [Amount]) VALUES (9, 8, 10.0000)
GO
SET IDENTITY_INSERT [Transactions] OFF
GO
ALTER TABLE [Items] WITH CHECK ADD CONSTRAINT [FK_Items_Items] FOREIGN KEY([ParentId])
REFERENCES [Items] ([ItemId])
GO
ALTER TABLE [Items] CHECK CONSTRAINT [FK_Items_Items]
GO
ALTER TABLE [Transactions] WITH CHECK ADD CONSTRAINT [FK_Transactions_Items] FOREIGN KEY([ItemId])
REFERENCES [Items] ([ItemId])
GO
ALTER TABLE [Transactions] CHECK CONSTRAINT [FK_Transactions_Items]
GO
控制器初始化时，对服务的更改将反映到控制器中。