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May 30, 2011 04:55
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Runtime iOS Version Checking
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| /* | |
| * System Versioning Preprocessor Macros | |
| */ | |
| #define SYSTEM_VERSION_EQUAL_TO(v) ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] == NSOrderedSame) | |
| #define SYSTEM_VERSION_GREATER_THAN(v) ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] == NSOrderedDescending) | |
| #define SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(v) ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] != NSOrderedAscending) | |
| #define SYSTEM_VERSION_LESS_THAN(v) ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] == NSOrderedAscending) | |
| #define SYSTEM_VERSION_LESS_THAN_OR_EQUAL_TO(v) ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] != NSOrderedDescending) | |
| /* | |
| * Usage | |
| */ | |
| if (SYSTEM_VERSION_LESS_THAN(@"4.0")) { | |
| ... | |
| } | |
| if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"3.1.1")) { | |
| ... | |
| } |
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Thanks! Very useful.