[英]How do I conditionally load assets for iOS7 and iOS6?
因此,我正在阅读过渡指南,如果我使用情节提要,则可以有条件地为iOS6或iOS7加载资产。 我正在使用它,但是我不明白如何将资产加载到故事板上。
您可以使用这些:
/** iOS Version Comparisons */
#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)
if ( SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"7.0") )
// do something for iOS 7
else
// do something for iOS 6, 5, 4
您也可以像这样使用它:
[myButton setBackgroundImage:( SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"7.0") ? @"image_ios7" : @"image_ios6" )];
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