iPhone的日期和版本在哪里？获得时区列表的时间 [英] Where is the iPhone's Date & Time getting its time zone list

问题描述

我可以使用 [NSTimeZone knownTimeZoneNames] 获取时区列表，但这只会提供时区ID，其中包含每个时区中的一个或两个城市。

I can get a list of time zones with [NSTimeZone knownTimeZoneNames], but that only gives the time zone IDs which include one or two cities in each time zone.

日期&时间设置有一个很好的城市列表，我看到一些其他应用程序具有相同但不相似的查找列表。

The Date & Time settings has a great list of cities and I have seen a few other apps that have the same if not similar lookup lists.

这些列表来自哪里？

我确实需要将选定的城市与其时区相关联，例如Date&时间确实。

I do need to relate a picked city to its time zone like Date & Time does.

推荐答案

只有2个？在3.1上 [NSTimeZone knownTimeZoneNames] 返回401个元素的数组，地球上的时区少于200个。

Only 2? On 3.1 the [NSTimeZone knownTimeZoneNames] returns an array of 401 elements, and there are much less than 200 timezones on the Earth.

我很确定其他应用程序也使用 + knownTimeZoneNames ，因为这是返回此类列表的唯一公共方法。但请确保您的代码正确无误。

I'm pretty sure "other apps" use +knownTimeZoneNames as well, since this is the only public method returning such list. Please make sure your code is correct, though.

Settings.app使用私有 <来自私人的 CPCity API AppSupport.framework。它确实有旧金山，但它是私有的。

Settings.app uses the private CPCity API from the private AppSupport.framework. It does have San Francisco, but it's private.

您需要创建自己的数据库（可以从 / System / Library /复制数据PrivateFrameworks / AppSupport.framework / all_cities_adj.plist ）。

You need to create your own database (the data can be copied from /System/Library/PrivateFrameworks/AppSupport.framework/all_cities_adj.plist).

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