让时间不再随系统设置而改变
为 NSString 写了一个类别, 把 时间戳 输出时间格式
1 + (NSString *)timeByTimestamp:(NSTimeInterval)timestamp { 2 3 4 NSTimeZone *zone = [NSTimeZone defaultTimeZone]; 5 6 static NSDateFormatter *formatter =nil; 7 static dispatch_once_t onceToken; 8 dispatch_once(&onceToken, ^{ 9 formatter = [[NSDateFormatter alloc] init]; 10 }); 11 formatter.locale=[[NSLocale alloc]initWithLocaleIdentifier:@"en_US"]; 12 [formatter setDateFormat:@"yyyy-MM-dd aa hh:mm"]; 13 [formatter setTimeZone:zone]; 14 15 CGFloat thatTime = timestamp; 16 NSDate *thatDate = [NSDate dateWithTimeIntervalSince1970:thatTime]; 17 NSString *thatString = [formatter stringFromDate:thatDate]; 18 NSDate *nowDate = [NSDate date]; 19 CGFloat nowTime = [nowDate timeIntervalSince1970]; 20 21 CGFloat spaceTime = nowTime - thatTime; 22 23 if (spaceTime / 60 < 5) { 24 return @"刚刚"; 25 } else if (spaceTime < 60 * 60 * 24) { 26 NSString *time = [thatString substringFromIndex:11]; 27 if ([time hasPrefix:@"PM"]) { 28 time = [time stringByReplacingOccurrencesOfString:@"PM" withString:@"下午"]; 29 } 30 if ([time hasPrefix:@"AM"]) { 31 time = [time stringByReplacingOccurrencesOfString:@"AM" withString:@"上午"]; 32 } 33 return time; 34 } else if (spaceTime < 60 * 60 * 24 * 2) { 35 NSString *time = [thatString substringFromIndex:11]; 36 if ([time hasPrefix:@"PM"]) { 37 time = [time stringByReplacingOccurrencesOfString:@"PM" withString:@"昨天下午"]; 38 } 39 if ([time hasPrefix:@"AM"]) { 40 time = [time stringByReplacingOccurrencesOfString:@"AM" withString:@"昨天上午"]; 41 } 42 return time; 43 } else if (spaceTime < 60 * 60 * 24 * 3) { 44 NSString *time = [thatString substringFromIndex:11]; 45 if ([time hasPrefix:@"PM"]) { 46 time = [time stringByReplacingOccurrencesOfString:@"PM" withString:@"前天下午"]; 47 } 48 if ([time hasPrefix:@"AM"]) { 49 time = [time stringByReplacingOccurrencesOfString:@"AM" withString:@"前天上午"]; 50 } 51 return time; 52 } else if (spaceTime < 60 * 60 * 24 * 4) { 53 NSString *time = [thatString substringFromIndex:11]; 54 if ([time hasPrefix:@"PM"]) { 55 time = [time stringByReplacingOccurrencesOfString:@"PM" withString:@"大前天下午"]; 56 } 57 if ([time hasPrefix:@"AM"]) { 58 time = [time stringByReplacingOccurrencesOfString:@"AM" withString:@"大前天上午"]; 59 } 60 return time; 61 } else if (spaceTime < 60 * 60 * 24 * 365) { 62 NSDateFormatter *dateFor = [[NSDateFormatter alloc] init]; 63 [dateFor setDateFormat:@"M月d日 aa h:mm"]; 64 [dateFor setTimeZone:zone]; 65 NSString *time = [dateFor stringFromDate:thatDate]; 66 time = [time stringByReplacingOccurrencesOfString:@"PM" withString:@"下午"]; 67 time = [time stringByReplacingOccurrencesOfString:@"AM" withString:@"上午"]; 68 return time; 69 } else { 70 NSDateFormatter *dateFor = [[NSDateFormatter alloc] init]; 71 [dateFor setDateFormat:@"yyyy年M月d日 aa h:mm"]; 72 [dateFor setTimeZone:zone]; 73 NSString *time = [dateFor stringFromDate:thatDate]; 74 time = [time stringByReplacingOccurrencesOfString:@"PM" withString:@"下午"]; 75 time = [time stringByReplacingOccurrencesOfString:@"AM" withString:@"上午"]; 76 return time; 77 } 78 }
