部署目标iOS 8.1将在iPhone 4 iOS 7.1.2上运行

Question

If i publish an app in the App Store with deployment target 8.1 will it run on an iPhone 4 with iOS 7.1.2? Or does this mean that my app will not be supported for iPhone 4 anymore?

Answer 1

据我对Android历史记录的了解，您可以在目标版本或更高版本上运行它，因此对您的问题不存在。

Answer 2

Answer found in StackOverflow item

The base SDK is what you build your app against (ie include and library files and frameworks). As you say, it doesn't effect the deployment target, except that base sdk >= deployment target.

You specify build settings on 2 levels as each project can have multiple targets and you might not want the same settings for all targets. The project-level settings override the default settings and the target-level settings override the project-level settings.

For example I have projects with both OSX and iOS targets and some are ARC and some are MRR. I'd have to have different projects for each if I was unable to specify build settings with the level of granularity that Xcode allows.