带NSDate的偏移量的JSON日期 [英] JSON date with offset to NSDate

问题描述

我正在开发一个Cocoa应用程序在Mac上，我消耗一个WCF服务，它返回一个JSON日期，来自一个SQL Server DATETIMEOFFSET字段。从包含日期字段的服务返回的JSON对象如下所示：

I am developing an Cocoa application on the Mac and I am consuming a WCF service which is returning me a JSON date which comes from a SQL Server DATETIMEOFFSET field. The JSON object returned from the service including the date fields is outlined below:

{
    "ObjectId": 1,
    "Name": "My Object Name",
    "Description": "My Object Description",   
    "CreateDate": {
        "DateTime": "/Date(1306481778297)/",
        "OffsetMinutes": 0
    },
    "LastModifiedDate": {
        "DateTime": "/Date(1306936930427)/",
        "OffsetMinutes": 0
    }
}

我的问题是如何转换CreateDate和LastModifiedDate字段到NSDate对象？

My question is how do I convert the CreateDate and LastModifiedDate fields to NSDate objects?

我试图创建一个NSDateFormatter并以这种方式抽象值。但是，这适用于简单字符串日期或标准JSON日期（/ Date（1306936930427）/），但不适用于包含日期和偏移量的日期对象。

I attempted to create a NSDateFormatter and abstract the value that way. However this works for simple string dates or the standard JSON date (/Date(1306936930427)/) but not the the date object containing the date and the offset.

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]
NSString *creationDate = [myObject valueForKey:@"CreateDate"];
NSDate *date = [dateFormatter dateFromString:creationDate];

任何对此的帮助都将非常感激。

Any help on this one will be much appreciated.

推荐答案

首先，从字符串中提取数字（例如1306936930427）; NSScanner 可能派上用场。然后除以1000.0，并使用NSDate的 dateWithTimeIntervalSince1970：类方法来获取你的NSDate。

First, extract the number from the string (e.g. 1306936930427); NSScanner might come in handy for this. Then divide it by 1000.0 and use NSDate's dateWithTimeIntervalSince1970: class method to get your NSDate.

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