问题:

I've upgraded iOS 5.0.1 to 5.1 and I'm using MonoTouch 5.2.5 and MonoDevelop 2.8.6.5. When I created a sample applcation in MonoDevelop, it shows the error "The apple iphone sdk not installed".

How do I get MonoTouch to work with iOS 5.1?

回答1:

Did you only update your device(s) to iOS 5.1 ? or

Did you install the new Xcode 4.3.1 from the AppStore ?

That where the iOS 5.1 SDK is available and MonoDevelop 2.8.6.5 should pick it up automatically.

From MonoDevelop menu, select About Mono Develop item, select the Version Info tab and look if anything is listed as missing (or simply looks wrong). You can edit your question to include this information (up to the Loaded Assemblies section).

回答2:

To solve the problem:

set the apple SDK in MonoDevelop to the correct installed version of XCode. This wil fix this issue. I did not find this answer anywhere, but this did the trick for me!