检查 iOS 7 或更早版本的最佳方法？
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Best Way to check for iOS 7 or earlier?
提问by Huang
I need to reconfigure some UI based on the iOS version I am running against, so I need a good way of checking the iOS version. For the time being I am doing this:
我需要根据我运行的 iOS 版本重新配置一些 UI，所以我需要一种检查 iOS 版本的好方法。目前我正在这样做：
if ([[[UIDevice currentDevice] systemVersion] isEqualToString: @"7.0"]) {
//do stuff
}
I'd prefer not to hard code these string comparisons and make decisions based on that. Are there any better ways of doing this?
我不想对这些字符串比较进行硬编码并基于此做出决定。有没有更好的方法来做到这一点？
回答by Segev
I always keep those in my Constants.h file:
我总是将它们保存在我的 Constants.h 文件中：
#define IS_IPHONE5 (([[UIScreen mainScreen] bounds].size.height-568)?NO:YES)
#define IS_OS_5_OR_LATER ([[[UIDevice currentDevice] systemVersion] floatValue] >= 5.0)
#define IS_OS_6_OR_LATER ([[[UIDevice currentDevice] systemVersion] floatValue] >= 6.0)
#define IS_OS_7_OR_LATER ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7.0)
#define IS_OS_8_OR_LATER ([[[UIDevice currentDevice] systemVersion] floatValue] >= 8.0)
#define IS_OS_9_OR_LATER ([[[UIDevice currentDevice] systemVersion] floatValue] >= 9.0)
Although I'll always prefer the above macros, for the completion of the accepted answer, here is the apple approved way:
虽然我总是更喜欢上面的宏，但为了完成接受的答案，这里是苹果批准的方式：
if (NSFoundationVersionNumber > NSFoundationVersionNumber_iOS_6_1) {
// do stuff for iOS 7 and newer
}
else {
// do stuff for older versions than iOS 7
}
回答by Ar Ma
if (NSFoundationVersionNumber > NSFoundationVersionNumber_iOS_6_1) {
// do stuff for iOS 7 and newer
}
else {
// do stuff for older versions than iOS 7
}
