I have an ASP.NET MVC 3 website that communicates with my iOS app via JSON. As part of the objects sent in the JSON response, I have dates in the format of yyyy-MM-dd HH:mm:ss ZZZ which outputs 2011-04-05 16:28:22 -07:00. How do I parse that in iOS?
我有一个ASP。NET MVC 3网站，通过JSON与我的iOS应用程序通信。作为JSON响应中发送的对象的一部分，我有yyyyyyyy - mm -dd:mm:ss ZZZ格式的日期，它输出2011-04-05 16:28:22 -07:00。如何在iOS中解析?
This is the code I'm messing around with right now:
这就是我现在在搞的代码:
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"yyyy-MM-dd'T'HH:mm:ssZZZ"];
[dateFormatter setTimeZone:[NSTimeZone localTimeZone]];
NSDate *date = [dateFormatter dateFromString:@"2011-04-05T16:28:22-0700"];
NSLog(@"%@; %@; %@", dateFormatter, date, [NSTimeZone localTimeZone]);
First thing to note is that 2011-04-05 16:28:22 -07:00 has to look like 2011-04-05T16:28:22-0700, where a T replaces the first space (assuming that stands for time, or where the time part of the string starts from?), the second space is removed and the colon in the time zone is removed. I figure I'll find a way to format the string that .NET is sending back to conform to the string iOS will parse.
首先要注意的是，2011-04-05(16:28 - 22)-07:00必须看起来像2011-04- 05t16:28 - 22-0700，其中T替换第一个空间(假设它代表时间，或者弦的时间部分从哪里开始)，第二个空间被移除，时区中的冒号被移除。我想我会找到一种方法来格式化。net正在发送的字符串，以符合iOS将要解析的字符串。
The real issue is that the date that is outputted is 7 hours ahead of what I've sent in the JSON response. So, iOS outputs 2011-04-05 16:28:22 -07:00 as 2011-04-05 23:28:22 +0000, and that is wrong as far as my app is concerned.
真正的问题是输出的日期比我在JSON响应中发送的日期早了7个小时。iOS输出2011-04-05 16:28 -07:00 2011-04-05 23:28 22 +0000，我的应用是错误的。
The only solution I've found so far is to send the date in the JSON as 2011-04-05 16:28:22 +00:00, but that again is wrong because I'm altering what the real date should be.
到目前为止，我找到的唯一解决方案是在JSON中发送日期为2011-04-05 16:28:22 +00:00，但这再次是错误的，因为我正在修改真正的日期应该是什么。
Anyway, I'd appreciate someone taking a look and letting me know how I can parse the date string .NET is outputting via the format yyyy-MM-dd HH:mm:ss ZZZ (which I suppose can be re-written to yyyy-MM-ddTHH:mm:ssZZZ) to an NSDate object I can use in iOS.
无论如何，我希望有人能看一看，让我知道如何解析。net输出的日期字符串格式yyyyyyy - mm -dd -dd:mm:ssZZZ(我想可以把它重写为yyyyyy - mm - ddthh:mm:ssZZZ)到一个可以在iOS中使用的NSDate对象。
3 个解决方案
#1
14
I don't know how right this is, but I ultimately found that in .NET I have to do DateTime.ToUniversalTime().ToString("yyyy-MM-ddHH:mm:ss") and on the iOS side I have to do this:
我不知道这有多正确，但我最终发现，在。net中，我必须做DateTime.ToUniversalTime().ToString(yyyyyyy - mm - ddhh:mm:ss)
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setTimeZone:[NSTimeZone timeZoneWithName:@"UTC"]];
[dateFormatter setDateFormat:@"yyyy-MM-ddHH:mm:ss"];
NSDate *date = [dateFormatter dateFromString:@"2011-04-0600:28:27"];
Only then is the date correct when NSLog outputs, so I'm assuming that I've finally got a proper date/time.
只有这样，NSLog输出的日期才会正确，所以我假设我最终得到了一个合适的日期/时间。
#2
6
Your iOS date parsing code is correct: 2011-04-05 16:28:22 -07:00 and 2011-04-05 23:28:22 +0000 represent the same time, just in different time zones. Your only problem is that NSDate doesn't actually store the time zone, and so [date description] outputs using UTC.
您的iOS日期解析代码是正确的:2011-04-05 16:28 -07:00和2011-04-05 23:28 - 22 +0000代表相同的时间，只是在不同的时区。您唯一的问题是NSDate实际上不存储时区，因此[date description]使用UTC输出。
#3
2
You're almost certainly better off just using UTC time everywhere for interchange and not bothering with time zones. I'm sure you can get that your ASP.NET code to do that, and it's easier to parse on the receiving end as well. NSDateFormatter uses standard Unicode date formatting syntax, which you can read about here.
几乎可以肯定的是，最好是在任何地方都使用UTC时间进行交换，而不需要考虑时区。我相信你能得到你的ASP。NET代码可以做到这一点，而且在接收端也更容易解析。NSDateFormatter使用标准的Unicode日期格式语法，您可以在这里阅读。
#1
14
I don't know how right this is, but I ultimately found that in .NET I have to do DateTime.ToUniversalTime().ToString("yyyy-MM-ddHH:mm:ss") and on the iOS side I have to do this:
我不知道这有多正确，但我最终发现，在。net中，我必须做DateTime.ToUniversalTime().ToString(yyyyyyy - mm - ddhh:mm:ss)
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setTimeZone:[NSTimeZone timeZoneWithName:@"UTC"]];
[dateFormatter setDateFormat:@"yyyy-MM-ddHH:mm:ss"];
NSDate *date = [dateFormatter dateFromString:@"2011-04-0600:28:27"];
Only then is the date correct when NSLog outputs, so I'm assuming that I've finally got a proper date/time.
只有这样，NSLog输出的日期才会正确，所以我假设我最终得到了一个合适的日期/时间。
#2
6
Your iOS date parsing code is correct: 2011-04-05 16:28:22 -07:00 and 2011-04-05 23:28:22 +0000 represent the same time, just in different time zones. Your only problem is that NSDate doesn't actually store the time zone, and so [date description] outputs using UTC.
您的iOS日期解析代码是正确的:2011-04-05 16:28 -07:00和2011-04-05 23:28 - 22 +0000代表相同的时间，只是在不同的时区。您唯一的问题是NSDate实际上不存储时区，因此[date description]使用UTC输出。
#3
2
You're almost certainly better off just using UTC time everywhere for interchange and not bothering with time zones. I'm sure you can get that your ASP.NET code to do that, and it's easier to parse on the receiving end as well. NSDateFormatter uses standard Unicode date formatting syntax, which you can read about here.
几乎可以肯定的是，最好是在任何地方都使用UTC时间进行交换，而不需要考虑时区。我相信你能得到你的ASP。NET代码可以做到这一点，而且在接收端也更容易解析。NSDateFormatter使用标准的Unicode日期格式语法，您可以在这里阅读。