如何定位“定时器”在iPhone上 [英] How To Localize a "Timer" on iPhone

问题描述

我需要在iPhone上以hh：mm：ss格式显示计时器，但希望它本地化。例如，芬兰在时间分量（hh.mm.ss）之间使用句号而不是冒号。如果我处理的是时间，那么Apple的NSDateFormatter可以解决这个问题，但我需要显示大于24的小时数。

I need to display a timer in "hh:mm:ss" format on the iPhone, but want it localized. Finland, for example uses a period instead of a colon between the time components (hh.mm.ss). Apple's NSDateFormatter would do the trick if I was dealing with a "time" but I need to display hours much greater than 24.

我无法制作NSDate / NSDateFormatter工作，因为当在一台与秒...

I have not been able to make an NSDate/NSDateFormatter work because when you make one with seconds...

NSDate *aDate = [NSDate dateWithTimeIntervalSinceReferenceDate:aTotalSeconds];

...每86,400秒（一天的价值）NSDate自动递增日，小时，分钟，并且秒数回到零。我需要让它在任何数秒内工作而不会翻滚。例如，我想要显示24：00：01秒（或芬兰的24.00.01）。

... every 86,400 seconds (one day's worth) NSDate automatically increments the day and hours, minutes, and seconds go back to zero. I need to make it work on an any number of seconds without rolling over. For example, with 86,401 seconds I want to display 24:00:01 (or 24.00.01 in Finland).

我的代码管理总秒数很好，所以唯一的问题我有显示器。一个简单的......

My code manages total seconds fine, so the only problem I have is the display. A simple...

[NSString stringWithFormat:@"%d%@%d%@%d", hours, sepString, mins, sepString, secs]

...如果我能找到一种方法可以使用本地化的sepString（时间组件分隔符）。 NSLocale似乎没有这个。

... would work if I could find a way to get at a localized "sepString" (the time component separator). NSLocale does not seem to have this.

想法？

推荐答案

以下是为任何语言环境获取时间组件分隔符的一种公认的hackish方法。它应该适用于iOS 3.2及更高版本。我知道代码可以更简洁，但我打开了maximum-verbosity标志，使其尽可能可读。

Here is a admittedly hackish way to get the time component separator for any locale. It should work on iOS 3.2 and above. I know the code can be more concise, but I turned my "maximum-verbosity" flag on to make it as readable as possible.

//------------------------------------------------------------------------------
- (NSString*)timeComponentSeparator
{
    // Make a sample date (one day, one minute, two seconds)
    NSDate *aDate = [NSDate dateWithTimeIntervalSinceReferenceDate:((24*60*60)+62)];

    // Get the localized time string
    NSDateFormatter *aFormatter = [[NSDateFormatter alloc] init];
    [aFormatter setDateStyle:NSDateFormatterNoStyle];
    [aFormatter setTimeStyle:NSDateFormatterShortStyle];
    NSString *aTimeString = [aFormatter stringFromDate:aDate]; // Not using +localizedStringFromDate... because it is iOS 4.0+

    // Get time component separator
    NSCharacterSet *aCharacterSet = [NSCharacterSet characterSetWithCharactersInString:@":-."];
    NSRange aRange = [aTimeString rangeOfCharacterFromSet:aCharacterSet];
    NSString *aTimeComponentSeparator = [aTimeString substringWithRange:aRange];    

    // Failsafe
    if ([aTimeComponentSeparator length] != 1)
    {
        aTimeComponentSeparator = @":";
    }

    return [[aTimeComponentSeparator copy] autorelease];
}
//------------------------------------------------------------------------------

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