我对目标C有点陌生。我正在尝试以字符串格式获取系统时区。我只需要“格林尼治时间5:30”在我的字符串。
_devTimezone = (NSString*)[NSTimeZone systemTimeZone];发布于 2015-10-14 06:41:24
您可以将日期描述作为字符串,然后将所需的子字符串作为
NSString *myDate = [[NSDate date] descriptionWithLocale:[NSLocale systemLocale]];
myDate=[myDate substringWithRange:NSMakeRange(26, 9)];
NSLog(@"%@",myDate);你会在日志中得到GMT+05:30。
*编辑*
如果不确定什么是索引,可以设置日期格式,然后访问索引。
NSString *dateStr = @"Wed, 14 Oct 2015 12:53:58 +0000";
// Convert string to date object
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:@"EE, d LLLL yyyy HH:mm:ss Z"];
NSDate *date = [dateFormat dateFromString:dateStr];
NSString *myDate = [date descriptionWithLocale:[NSLocale systemLocale]];
myDate=[myDate substringWithRange:NSMakeRange(26, 9)];
NSLog(@"%@",myDate);快乐编码..。:)
发布于 2015-10-14 07:05:50
您可以使用NSTimeZone方法secondsFromGMT获取偏移量作为NSInteger值,然后使用NSString方法stringWithFormat和基本算法将整数值划分为小时和分钟来格式化您想要的格式。
样本代码:
- (NSString *) getTimeZoneOffset:(NSTimeZone *)timezone
{
NSInteger minutesFromGMT = timezone.secondsFromGMT / 60;
// handle negative offsets
char sign;
if (minutesFromGMT < 0)
{
sign = '-';
minutesFromGMT = -minutesFromGMT; // make positive
}
else
sign = '+';
// split in hours and minutes
NSInteger hoursFromGMT = minutesFromGMT / 60;
minutesFromGMT %= 60;
// format as string - making sure minutes is two digits with leading zero if needed
// cast to int is OK as no value will be greater than 59!
return [NSString stringWithFormat:@"GMT%c%d:%02d", sign, (int)hoursFromGMT, (int)minutesFromGMT];
}HTH
发布于 2015-10-14 07:41:10
就像这样。
NSDate *currentDate = [NSDate date];
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
// display in 12HR/24HR (i.e. 11:25PM or 23:25) format according to User Settings
[dateFormatter setTimeStyle:NSDateFormatterShortStyle];
//set timezone to GMT 5:30.
[dateFormatter setTimeZone:[NSTimeZone timeZoneWithName:@"GMT"]];
NSString *currentTime = [dateFormatter stringFromDate:currentDate];
NSLog(@"User's current time %@",currentTime);希望它能帮到你。
https://stackoverflow.com/questions/33117601
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