如何定位特定的 iPhone 版本? [英] How to target a specific iPhone version?

问题描述

我有一些代码只想在最新的 iPhone SDK (3.0) 上执行，但是我似乎无法找到一种只针对 3.0 而忽略 2.2.1 等的方法.有一个 ifdef 语句，但它似乎只是覆盖了整个 iPhone:

I've got some code I want to only execute on the latest iPhone SDK (3.0), however I can't seem to figure out a way to target just 3.0 and ignore 2.2.1 etc. There is an ifdef statement, but it just seems to cover the entire iPhone:

#if TARGET_OS_IPHONE

感谢任何帮助.

推荐答案

您可以使用此 #define 来更改您为每个 SDK 构建的内容...

You can use this #define to change what you build for each SDK...

#if __IPHONE_OS_VERSION_MIN_REQUIRED > __IPHONE_2_2
// iPhone 3.0 code here
#endif

并在运行时执行此操作以运行 3.0 及更高版本的代码:

And do this at run-time to run code for 3.0 and above:

float version = [[[UIDevice currentDevice] systemVersion] floatValue];
if (version >= 3.0)
    {
    // iPhone 3.0 code here
    }

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