iphone - 在 iphone 中转换日期时间

Question

我需要将当前日期时间转换为"04/10/2013 12:00:00 GMT+5:00"格式。我经历了不同的方法，但无法获得确切的格式。谁能知道请帮助我。

Answer 1

NSDate *myDate = [NSDate date]; 
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:@"dd/MM/yyyy hh:mm:ss ZZZ"];
NSString * dateString = [formatter stringFromDate:myDate];

这将是 12 小时格式。如果您想要 24 小时格式，请将 hh 替换为 HH。

Answer 2

NSDateFormatter *format = [[NSDateFormatter alloc] init];
[format setDateFormat:@"MMM, dd, yyyy HH:mm:ss Z"];

NSDate *now = [NSDate date];

NSString *dateString = [format stringFromDate:now];

Answer 3

// String To Date Conversion
NSString *dateStr = @"5/13/2012 6:05 am";
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"M/d/yyyy h:mm a"];
NSDate *myDate = [dateFormatter dateFromString:dateStr];

// This converts time to GMT local timezone    
NSDateFormatter* df_local = [[[NSDateFormatter alloc] init] autorelease];
// calculate Number of seconds upto 5hrs(GMT+5000) seconds = 18000, if its GMT+0530 then seconds = 19800
// Set TimeZone Accordingly
[df_local setTimeZone:[NSTimeZone timeZoneForSecondsFromGMT:18000]];
// Set your Date Formate
[df_local setDateFormat:@"MM/dd/yyyy hh:mm:ss"];

// Your Final Output String
NSString* ts_local_string = [NSString stringWithFormat:@"%@ %@",[df_local stringFromDate:myDate],[[df_local timeZone] name]];
NSLog(@"Final string : %@",ts_local_string);

NSString* anotherFormat = [NSString stringWithFormat:@"%@ %@",[df_local stringFromDate:myDate],[[df_local timeZone] abbreviation]];
NSLog(@"OUtput : %@",anotherFormat);

输出：最终字符串：05/13/2012 05:35:00 GMT+0500