Detecting iPhone 6/6+ screen sizes in point values

Question

Given the newly announced iPhone 6 screen sizes:

iPhone 6: 1334h * 750w @2x (in points: 667h * 375w)
iPhone 6+: 1920 * 1080 @3x (in points: 640h * 360w)
         


        

Answer 1

this is guaranteed to compile in xcode 5 (xocde 6 at this point is still flaky, and you can't submit an ipa to itunes connect for app store approval using beta software, which xcode 6 is right now)

the thing is xcode 5 won't recognize the nativeScale selector.. this is how you can do it in run time:

+ (BOOL)isIphone6Plus
{
    SEL selector = NSSelectorFromString(@"nativeScale");
    if ([[UIScreen mainScreen] respondsToSelector:selector]) {
            NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:
                                        [[[UIScreen mainScreen] class] instanceMethodSignatureForSelector:selector]];
            [invocation setSelector:selector];
            [invocation setTarget:[UIScreen mainScreen]];
            [invocation invoke];
            float returnValue;
            [invocation getReturnValue:&returnValue];
            NSLog(@"::: this is native scale %f", returnValue);
            return (returnValue == 3.0f);
    } else {
        // iphone 6 plus come prepackaged with iOS8.. 
        // so if the phone doesn't know what nativeScale means
        // it's not an iphone6plus phone
        return NO;
    }
}