我用这个代码
- #define IS_IOS7 (NSFoundationVersionNumber > NSFoundationVersionNumber_iOS_6_1)
查找应用程序是否在iOS7上运行.
但我现在需要知道它是否在iOS7.1上运行,但是没有任何NSFoundationVersionNumber_iOS_7_0和NSFoundationVersionNumber_iOS_7_1
我知道的定义
- #define NSFoundationVersionNumber_iOS_6_1 993.00
所以也许我可以比较高于993的数字,但我不知道.
有人得到安全可靠的解决方案吗?
解决方法
有几种方法可以做到这一点,你可以在SO上的几个答案中轻松找到它们.这里有一些:
- [[UIDevice currentDevice] systemVersion]
稍微复杂一点,测试:
- if (floor(NSFoundationVersionNumber) > NSFoundationVersionNumber_iOS_6_1) {
- // iOS7...
- }
- /*
- * 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")) {
- ...
- }
资料来源:
How can we programmatically detect which iOS version is device running on?