How to define preprocessor macro to check iOS version

Question

I use it to check iOS version, but it doesn\'t work:

#ifndef kCFCoreFoundationVersionNumber_iPhoneOS_5_0
#define kCFCoreFoundationVersionNumber_iPhoneOS_5_0          


        

Answer 1

For a runtime check use something like this:

- (BOOL)iOSVersionIsAtLeast:(NSString*)version {
    NSComparisonResult result = [[[UIDevice currentDevice] systemVersion] compare:version options:NSNumericSearch];
    return (result == NSOrderedDescending || result == NSOrderedSame);
}

If you create a category on UIDevice for it, you can use it as such:

@implementation UIDevice (OSVersion)
- (BOOL)iOSVersionIsAtLeast:(NSString*)version {
    NSComparisonResult result = [[self systemVersion] compare:version options:NSNumericSearch];
    return (result == NSOrderedDescending || result == NSOrderedSame);
}
@end

...

if([[UIDevice currentDevice] iOSVersionIsAtLeast:@"6.0"]) self.navigationBar.shadowImage = [UIImage new];

Answer 2

#define isIOS7 ([[[UIDevice currentDevice]systemVersion]floatValue] > 6.9) ?1 :0

Answer 3

#ifdef __IPHONE_5_0 

etc

Just look for that constant. All the objective c constants start with two underscores

Answer 4

You've defined a macro, but you're using it in the non-macro way. Try something like this, with your same macro definition.

IF_IOS5_OR_GREATER(NSLog(@"iOS5");)

(This is instead of your #if/#endif block.)

Answer 5

Define this method:

+(BOOL)iOS_5 {
    NSString *osVersion = @"5.0";
    NSString *currOsVersion = [[UIDevice currentDevice] systemVersion];
    return [currOsVersion compare:osVersion options:NSNumericSearch] == NSOrderedAscending;
}

Then define the macro as that method.

Answer 6

Much simpler:

#define IS_IOS6_AND_UP ([[UIDevice currentDevice].systemVersion floatValue] >= 6.0)