1 //將UTCDate(世界標准時間)轉化為當地時區的標准Date（鍾表顯示的時間） 2 //NSDate *date = [NSDate date]; 2018-03-27 06:54:41 +0000 3 //轉化后：2018-03-27 14:54:41 +0000
4 -(NSDate *)getLocalDateFromUTCDate:(NSDate *)UTCDate{ 5
6 NSTimeZone *tz = [NSTimeZone defaultTimeZone]; 7 NSInteger seconds = [tz secondsFromGMTForDate: UTCDate]; 8 return [NSDate dateWithTimeInterval: seconds sinceDate: UTCDate]; 9
10 } 11
12 //將當地時區的標准Date轉化為UTCDate 13 //當前當地的標准時間：2018-03-27 14:54:41 +0000 14 //轉化為世界標准時間:2018-03-27 06:54:41 +0000
15 -(NSDate *)getUTCDateFromLocalDate:(NSDate *)LocalDate{ 16
17 NSTimeZone *tz = [NSTimeZone defaultTimeZone]; 18 NSInteger seconds = -[tz secondsFromGMTForDate: LocalDate]; 19 return [NSDate dateWithTimeInterval: seconds sinceDate: LocalDate]; 20
21 } 22
23 //根據UTCDate獲取當前時間字符串（鍾表上顯示的時間） 24 //輸入：[NSDate date] 2018-03-27 07:44:05 +0000 25 //輸出：2018-03-27 15:44:05
26 -(NSString *)localStringFromUTCDate:(NSDate *)UTCDate{ 27
28 NSDateFormatter *dateFormatter = [[NSDateFormatter alloc]init]; 29 NSTimeZone *tz = [NSTimeZone defaultTimeZone]; 30 [dateFormatter setTimeZone:tz]; 31 [dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"]; 32 NSString* result=[dateFormatter stringFromDate:UTCDate]; 33 return result; 34
35 } 36
37 //根據UTC字符串獲取當前時間字符串（鍾表上顯示的時間） 38 //輸入：2018-03-27 07:44:05 39 //輸出：2018-03-27 15:44:05
40 -(NSString *)localStringFromUTCString:(NSString *)UTCString{ 41
42 //先將UTC字符串轉為UTCDate;
43 NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; 44 NSTimeZone *tz = [NSTimeZone timeZoneWithAbbreviation:@"GMT"]; 45 [dateFormatter setTimeZone:tz]; 46 [dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"]; 47 NSDate *UTCDate = [dateFormatter dateFromString:UTCString]; 48
49 [dateFormatter setTimeZone:[NSTimeZone defaultTimeZone]]; 50 NSString* result = [dateFormatter stringFromDate:UTCDate]; 51 return result; 52 } 53
54 //將當前時間字符串轉為UTCDate
55 -(NSDate *)UTCDateFromLocalString:(NSString *)localString{ 56
57 NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; 58 [dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"]; 59 NSDate *date = [dateFormatter dateFromString:localString]; 60 return date; 61 } 62
63 //將當前時間字符串轉為UTC字符串
64 -(NSString *)UTCStringFromLocalString:(NSString *)localString{ 65
66 NSDate *date = [self UTCDateFromLocalString:localString]; 67 NSString *string = [NSString stringWithFormat:@"%@",date]; 68 NSString *result = [string substringToIndex:string.length-6]; 69 return result; 70
71 } 72
73 //UTCDate轉UTC字符串
74 -(NSString *)UTCStringFromUTCDate:(NSDate *)UTCDate{ 75
76 NSDateFormatter *dataFormatter = [[NSDateFormatter alloc]init]; 77 [dataFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"]; 78 NSTimeZone *tz = [NSTimeZone timeZoneWithAbbreviation:@"GMT"]; 79 [dataFormatter setTimeZone:tz]; 80 NSString *UTCString = [dataFormatter stringFromDate:UTCDate]; 81 return UTCString; 82
83 } 84
85 //將當前時間（UTCDate）轉為時間戳
86 -(NSString *)timeStampFromUTCDate:(NSDate *)UTCDate{ 87
88 NSTimeInterval timeInterval = [UTCDate timeIntervalSince1970]; 89 // *1000,是精確到毫秒；這里是精確到秒;
90 NSString *result = [NSString stringWithFormat:@"%.0f",timeInterval]; 91 return result; 92
93 } 94
95 //當前時間字符串(鍾表上顯示的時間)轉為時間戳
96 -(NSString *)timeStamapFromLocalString:(NSString *)localString{ 97
98 //先轉為UTCDate
99 NSDate *UTCDate = [self UTCDateFromLocalString:localString]; 100 NSString *timeStamap = [self timeStampFromUTCDate:UTCDate]; 101 return timeStamap; 102
103 } 104
105 //將UTCString轉為時間戳
106 -(NSString *)timeStamapFromUTCString:(NSString *)UTCString{ 107
108 //先將UTC字符串轉為UTCDate;
109 NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; 110 NSTimeZone *tz = [NSTimeZone timeZoneWithAbbreviation:@"GMT"]; 111 [dateFormatter setTimeZone:tz]; 112 [dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"]; 113 NSDate *UTCDate = [dateFormatter dateFromString:UTCString]; 114
115 NSString *timeStamap = [self timeStampFromUTCDate:UTCDate]; 116 return timeStamap; 117 } 118
119 //時間戳轉UTCDate
120 -(NSDate *)UTCDateFromTimeStamap:(NSString *)timeStamap{ 121
122 NSTimeInterval timeInterval=[timeStamap doubleValue]; 123 // /1000;傳入的時間戳timeStamap如果是精確到毫秒的記得要/1000
124 NSDate *UTCDate=[NSDate dateWithTimeIntervalSince1970:timeInterval]; 125 return UTCDate; 126
127 }
若是想要將時間戳轉為字符串，可根據獲得的UTCDate再進行轉化
