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    <p>As a .NET programmer learning Objective-C I had the same problem when I tried to consume a .Net WebService.</p> <p>At first I thought I would be able to use the NSDateFormatter... I found a really good reference for it's symbols <a href="http://www.stepcase.com/blog/2008/12/02/format-string-for-the-iphone-nsdateformatter/" rel="noreferrer">here</a>, but I quickly realized that I needed to convert the number from milliseconds to seconds.</p> <p>I wrote the code to do it... I'm still learning Obj-C but I dont think It should've been this hard...</p> <pre><code>- (NSDate *) getJSONDate{ NSString* header = @"/Date("; uint headerLength = [header length]; NSString* timestampString; NSScanner* scanner = [[NSScanner alloc] initWithString:self]; [scanner setScanLocation:headerLength]; [scanner scanUpToString:@")" intoString:&amp;timestampString]; NSCharacterSet* timezoneDelimiter = [NSCharacterSet characterSetWithCharactersInString:@"+-"]; NSRange rangeOfTimezoneSymbol = [timestampString rangeOfCharacterFromSet:timezoneDelimiter]; [scanner dealloc]; if (rangeOfTimezoneSymbol.length!=0) { scanner = [[NSScanner alloc] initWithString:timestampString]; NSRange rangeOfFirstNumber; rangeOfFirstNumber.location = 0; rangeOfFirstNumber.length = rangeOfTimezoneSymbol.location; NSRange rangeOfSecondNumber; rangeOfSecondNumber.location = rangeOfTimezoneSymbol.location + 1; rangeOfSecondNumber.length = [timestampString length] - rangeOfSecondNumber.location; NSString* firstNumberString = [timestampString substringWithRange:rangeOfFirstNumber]; NSString* secondNumberString = [timestampString substringWithRange:rangeOfSecondNumber]; unsigned long long firstNumber = [firstNumberString longLongValue]; uint secondNumber = [secondNumberString intValue]; NSTimeInterval interval = firstNumber/1000; return [NSDate dateWithTimeIntervalSince1970:interval]; } unsigned long long firstNumber = [timestampString longLongValue]; NSTimeInterval interval = firstNumber/1000; return [NSDate dateWithTimeIntervalSince1970:interval]; } </code></pre> <p>Hopefully someone can provide a better Obj-C solution. If not I may keep this or look for a way to change the serialization format in .NET</p> <p>EDIT:</p> <p>About that JSON DateTime format... If you have any control on the service it would probably be best to convert the date to a string in your DataContract objects.</p> <p><a href="http://msdn.microsoft.com/en-us/library/system.globalization.datetimeformatinfo.rfc1123pattern(VS.96).aspx" rel="noreferrer">Formatting to RFC1123</a> seems like a good idea to me right now. As I can probably pick it up easily using a NSDateFormatter.</p> <p>Quote from <a href="http://www.west-wind.com/weblog/posts/324917.aspx" rel="noreferrer">Rick Strahl</a></p> <blockquote> <p>There's no JavaScript date literal and Microsoft engineered a custom date format that is essentially a marked up string. The format is a string that's encoded and contains the standard new Date(milliseconds since 1970) value.</p> </blockquote>
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    1. COThanks for the answer. I basically took the same approach you did. It feels like a hack and I wish there was a cleaner solution, but oh well it works for now.
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    2. CO[scanner dealloc]; shouldn't it be [scanner release]; !! :)
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    3. COnice solution, but secondNumber is not used at all after being parsed. It should be correcting the Date for GMT
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