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POEasy way to detect if I am using framework not available to older iOS
 

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  1. POEasy way to detect if I am using framework not available to older iOS
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    <p>After a marathon coding session, where I added too much code without keeping track of everything, I now have an app that probably has some iOS 5.0 and 5.1 specific enums, calls and frameworks, however, I want my app to support iOSes back to 4.3. </p> <p>I was hoping that there was an easy way of setting Xcode to compile as if it were compiling for iOS 4.3, so that I would get errors for all of the offending code that needs to be conditioned out, and/or alternatively coded, for older iOS.</p> <p>I thought I'd get that by using the compiler option: </p> <pre><code>-D__IPHONE_OS_VERSION_MAX_ALLOWED=__IPHONE_4_3 </code></pre> <p>but that ends up generating error in system header files, not my code.</p> <p>Given that most enums and frameworks have their availability included in the header files, I have to think that there is an easy way to do what I need.</p> <p>Has anyone managed to do such a thing without resorting to downloading older Xcodes with old SDKs? There I may run into the issue of Xcodes that won't function properly under Lion (which is what I am running).</p> <p>UPDATE: It appears as though I can't install Xcode 3.2.6 on Lion. I now will have to find a Snow Leopard Mac, unless I find a way to use compiler options or forcing Xcode to use old SDKs...</p> <p>Here is a sample of what @mattjgalloway's answer did for me:</p> <p>Lumin App Group</p> <p>/Users/mz/Dev/Working/Lumin/Lumin/MyUIScreen.m</p> <ul> <li>'brightness' is deprecated: TOO NEW!</li> <li>'brightness' is deprecated: TOO NEW!</li> <li>'brightness' is deprecated: TOO NEW!</li> <li>'brightness' is deprecated: TOO NEW!</li> </ul> <p>/Users/mz/Dev/Working/Lumin/Lumin/LuminViewController+Share.m</p> <ul> <li>'TWTweetComposeViewController' is deprecated: TOO NEW!</li> <li>'TWTweetComposeViewController' is deprecated: TOO NEW!</li> <li>'TWTweetComposeViewController' is deprecated: TOO NEW!</li> </ul> <p>/Users/mz/Dev/Working/Lumin/Lumin/LuminViewController.m</p> <ul> <li>'scrollView' is deprecated: TOO NEW!</li> <li>'connectionWithMediaType:' is deprecated: TOO NEW!</li> <li>'connectionWithMediaType:' is deprecated: TOO NEW!</li> <li>'AVCaptureDeviceSubjectAreaDidChangeNotification' is deprecated: TOO NEW!</li> <li>'setSubjectAreaChangeMonitoringEnabled:' is deprecated: TOO NEW!</li> </ul> <p>Very nice.</p> <p>I placed the following in my project's .pch file, and am planning on doing so for all projects:</p> <pre><code>#if DEBUG #define __IPHONE_OS_VERSION_SOFT_MAX_REQUIRED __IPHONE_OS_VERSION_MIN_REQUIRED #import "MJGAvailability.h" #endif </code></pre> <p>For any project, I am now automatically watching for SDK issues based on the earliest iOS I am targeting. While there still may be SDK changes I have to worry about, at least I know of most framework additions that are unavailable to an older iOS release.</p>
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    1. COWhat happened when you tried to install Xcode 3.2.6 on Lion? I'm running that config, but Xcode was installed long before upgrading to 10.7. Is it specifically an installation problem?
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    2. COI get an "Installation Failed. An unknown installation error occurred.", and it tell me to "contact the software manufacturer". I got this again from a newly downloaded image from developer.apple.com.
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