ios - Have 4.3 SDK only, want 3.x as well -

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i know has been discussed before, didn't quote understand of answers. can tell other questions on here, i'm complete newbie when comes app creation using xcode. have sdk ios 4.3.

a friend of mine wants app, has iphone 3. has not upgraded ios4. don't see reason app couldn't run @ lower ios version, it's pretty simple.

so i'd know how can add previous sdks xcode library? download previous version of xcode w/ it's sdk , install that? brick xcode? if so, then? there can do, i'd written 3.x , above in mind.

the simple , more straight forward answers without jargon extremely appreciated!

thank you!

if have ios 4.3 sdk, can target ios version preceding it. in xcode project build settings, make sure base sdk set highest have (in case 4.3) change deployment target whatever ios version want (try not go lower 3.0).

make sure test though, sure not using features not present in sdk version targeting.


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