tatsuro-ueda/ローカル時間の変換をするには.md

## ローカル時間の変換をするには.md

      
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              ローカル時間の変換をするには.md
            
          
    ##Convert GMT to IST in iOS
The code below convert GMT to IST.
NSString *inDateStr = @"2000/01/02 03:04:05";
NSString *s = @"yyyy/MM/dd HH:mm:ss";

// about input date(GMT)
NSDateFormatter *inDateFormatter = [[NSDateFormatter alloc] init];
inDateFormatter.dateFormat = s;
inDateFormatter.timeZone = [NSTimeZone timeZoneWithAbbreviation:@"GMT"];
NSDate *inDate = [inDateFormatter dateFromString:inDateStr];

// about output date(IST)
NSDateFormatter *outDateFormatter = [[NSDateFormatter alloc] init];
outDateFormatter.timeZone = [NSTimeZone timeZoneWithAbbreviation:@"IST"];
outDateFormatter.dateFormat = s;
NSString *outDateStr = [outDateFormatter stringFromDate:inDate];

// final output
NSLog(@"[in]%@ -> [out]%@", inDateStr, outDateStr);