开发新应用程序；保持 iOS 4 兼容性还值得吗？
我目前正处于为客户开发新 iOS 应用程序（适用于 iPhone 和 iPad）的起始阶段。我真的很犹豫是否应该继续支持iOS 4。我试图找到一些有关 iOS 5 采用情况的统计数据，我能找到的唯一最近的文章之一是 这个。 这篇文章表明截至去年 12 月 30 日，iPhone 版 Bump 的所有用户中有 59.16% 使用 iOS 5 或更高版本。 （免费）应用程序还要过 1.5 到 2 个月才会推出，我个人猜测到那时 iOS 5 的采用率将会相当大。
我完全意识到这个问题没有单一的答案，但我想知道您在向后兼容性方面的经验是什么，以及您是否认为值得这么麻烦。我真的很想使用 Xcode 的新 Storyboard 功能，而且我也很想使用 ARC（尽管我知道它也可以在 iOS 4 中部分使用）。该应用程序还将使用相当多的 JSON，现在是
感谢您的帮助！
I am currently in the starting phase of developing a new iOS app (for both iPhone and iPad) for a client. I'm really indecisive if I should still support iOS 4 or not. I tried to find some statistics about the adoption of iOS 5, one of the only fairly recent articles that I could find was this one. This article shows that 59,16% of all users of Bump for iPhone were using iOS 5 or later as of December 30th of last year. The (free) app will not be out for another 1.5 to 2 months, my personal guess is that the iOS 5 adoption percentage will be pretty large by then.
I fully realize that there is no single answer to this question, but I would like to know what your experiences with backwards compatibility are and if you think it is worth the hassle. I would really like to use the new Storyboard functionality of Xcode and I would also really like to use ARC (although I understand that it is partially useable with iOS 4 too). The app will also use quite a bit of JSON and which is now natively supported in iOS 5 without the use of a third party framework.
Thanks for the help!
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老实说，这取决于。如果您的应用程序想要覆盖大量用户（社交网络，也许是游戏），那么支持旧操作系统是唯一的方法。您的统计数据表明，整整 41%（很可能要少得多）的 iOS 设备都在使用 iOS 5，因此 41% 的庞大安装基数可能看起来不多，但就营销而言，这个数字是巨大的。
但是，如果您想吸引特殊受众（例如特殊的合成器应用程序或非常复杂的应用程序），则需要最新的操作系统就不再是负担。
所以，你选吧。这确实是您个人的选择。无论哪种方式;你不会出错的。
It honestly depends. If your app wants to reach a large number of users (social networking, maybe a game), then supporting older OS's is the ONLY way. Your statistics imply that a full 41% (most likely a lot less) of iOS devices are on iOS 5, so 41% of a huge install base may not seem like a lot, but when it comes to marketing, it's huge.
But if you want to reach a special audience (say a special synthesizer app, or a REALLY complicated application), requiring the latest OS becomes less of a burden.
So, take your pick. It's really your personal choice. Either way; you can't go wrong.
这是一些真实数据 - 对于我的应用程序，大约 75% 的用户使用 iOS5。
Here is some real data - for my apps approx 75% of users are on iOS5.
答案是肯定的。您不知道有多少人不知道 5.0 已经发布，甚至不知道它是什么。我的邻居仍然有 3.1，而且它太旧了，iTunes 无法升级它。
目标为 4.2。
The answer is yes. You have no idea how many ppl have no clue that 5.0 is out, or even what it is. My neighbor still has 3.1 and it is so old that iTunes fails to upgrade it.
Target for 4.2.