Question

我有一个应用程序，我想提供一个UTC时区列表，以便用户可以选择目的地时间。我在选择器视图中有所有国家/地区缩写。但我想要UTC缩写。任何人都可以建议我如何实现这一目标。

由于

Answer 1

您可以对所有时区使用 NSTimeZone 的 knownTimeZoneNames 属性。

[NSTimeZone knownTimeZoneNames]

或者您可以使用 abbreviationDictionary 获取所有缩写

[[NSTimeZone abbreviationDictionary] allKeys]

如果您想要这些时区的时间，请使用以下代码

NSArray *abbs = [[NSTimeZone abbreviationDictionary] allKeys];

    for (id eachObj in abbs) {

        NSString *dateStr = [self dateFromTimeZoneAbbreviation:eachObj];
        NSLog(@"%@",dateStr);

    }

将方法定义为

-(NSString *)dateFromTimeZoneAbbreviation:(NSString *)abb   {

    NSString *dateStr;

    NSTimeZone *currentTimeZone = [NSTimeZone localTimeZone];
    NSTimeZone* timeZoneFromAbbreviation = [NSTimeZone timeZoneWithAbbreviation:abb];

    NSInteger currentGMTOffset = [currentTimeZone secondsFromGMTForDate:[NSDate date]];
    NSInteger gmtOffset = [timeZoneFromAbbreviation secondsFromGMTForDate:[NSDate date]];
    NSTimeInterval gmtInterval = currentGMTOffset - gmtOffset;

    NSDate *destinationDate = [[NSDate alloc] initWithTimeInterval:gmtInterval sinceDate:[NSDate date]] ;

    NSDateFormatter *dateFormatters = [[NSDateFormatter alloc] init];
    [dateFormatters setDateFormat:@"dd-MMM-yyyy hh:mm"];
    /*[dateFormatters setDateStyle:NSDateFormatterShortStyle];
     [dateFormatters setTimeStyle:NSDateFormatterShortStyle];
     [dateFormatters setDoesRelativeDateFormatting:YES];*/
    [dateFormatters setTimeZone:[NSTimeZone systemTimeZone]];
    dateStr = [dateFormatters stringFromDate: destinationDate];
    NSLog(@"DateString : %@, TimeZone : %@", dateStr , timeZoneFromAbbreviation.abbreviation);

    return dateStr;
}

Answer 2

NSLog(@"%@", [NSTimeZone knownTimeZoneNames]);//viewDidLoad
for(id timezone in [NSTimeZone knownTimeZoneNames]){
     NSLog(@"%@",[self getTimeZoneStringForAbbriviation:timezone]);
    NSLog(@"%@", timezone);
}

-(NSString*)getTimeZoneStringForAbbriviation:(NSString*)abbr{
    NSTimeZone *atimezone=[NSTimeZone timeZoneWithName:abbr];
    int minutes = (atimezone.secondsFromGMT / 60) % 60;
    int hours = atimezone.secondsFromGMT / 3600;
    NSString *aStrOffset=[NSString stringWithFormat:@"%02d:%02d",hours, minutes];
    return [NSString stringWithFormat:@"GMT%@",aStrOffset];
}

如何获取ios中所有UTC缩写的列表？

2 个答案: