使用宏检测iPhone6和iPhone6 Plus

Question

I am attempting to detect whether the current device is iPhone5, iPhone6 or iPhone 6 Plus.

In my app I am already using this macro to detect iPhone 5 which works perfectly.

#define IS_IPHONE_5      (fabs((double)[[UIScreen mainScreen]bounds].size.height - (double)568) < DBL_EPSILON)

Similarly, I use this macro to detect iPhone 6 and iPhone 6 Plus.

#define IS_IPHONE_6      (fabs((double)[[UIScreen mainScreen]bounds].size.height - (double)667) < DBL_EPSILON)
#define IS_IPHONE_6_PLUS (fabs((double)[[UIScreen mainScreen]bounds].size.height - (double)736) < DBL_EPSILON)

The IS_IPHONE_5 macro works as expected in any orientation.

My problem is that the IS_IPHONE_6 and IS_IPHONE_6_PLUS macros do not return true when the device is held in LANDSCAPE. However they do work as expect while the device is held in PORTRAIT. What gives?

Also if anyone has a better recommendation to detect iPhone5, 6 and 6 Plus please share.

Answer 1

This is tested and designed for any combination of iOS system versions and SDK versions

#define IS_IPAD (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)
#define IS_IPHONE (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone)
#define IS_RETINA ([[UIScreen mainScreen] scale] >= 2.0)

#define SCREEN_WIDTH ([[UIScreen mainScreen] bounds].size.width)
#define SCREEN_HEIGHT ([[UIScreen mainScreen] bounds].size.height)
#define SCREEN_MAX_LENGTH (MAX(SCREEN_WIDTH, SCREEN_HEIGHT))
#define SCREEN_MIN_LENGTH (MIN(SCREEN_WIDTH, SCREEN_HEIGHT))

#define IS_IPHONE_4_OR_LESS (IS_IPHONE && SCREEN_MAX_LENGTH < 568.0)
#define IS_IPHONE_5 (IS_IPHONE && SCREEN_MAX_LENGTH == 568.0)
#define IS_IPHONE_6 (IS_IPHONE && SCREEN_MAX_LENGTH == 667.0)
#define IS_IPHONE_6P (IS_IPHONE && SCREEN_MAX_LENGTH == 736.0)

Note: If iPhone 6 is in zoomed mode the UI is a zoomed up version of iPhone 5. This is reflected in the macros.

Usage: http://pastie.org/9687735

Answer 2

Don't use the screen size for this, it's better to use the hardware model. We are getting more and more screen sizes every year, the less you hard-code screen dimensions in your code the better for your future self.

You need a helper function to get the machine name. I'm using dispatch_once to avoid querying the system multiple times for data that won't change.

NSString* machineName()
{
    static NSString* name = nil;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        struct utsname systemInfo;
        uname(&systemInfo);
        name = [NSString stringWithCString:systemInfo.machine encoding:NSUTF8StringEncoding];
    });
    return name;
}

Then define a few macros as needed:

#define IS_IPHONE_6      [machineName() isEqualToString:@"iPhone7,2"]
#define IS_IPHONE_6_PLUS [machineName() isEqualToString:@"iPhone7,1"]

For some models is trickier:

#define IS_IPHONE_5s     [machineName() hasPrefix:@"iPhone6,"]

Finally, use the macros in your code:

if (IS_IPHONE_6) {
// for the 6
}

Note: This answer your question (detect models with macros) but you're doing it wrong IMHO. You should use autolayout and size classes, unless you support really old iOS versions...

Answer 3

Take a look at this answer: iOS - How to get device make and model? it doesn't use macros but it does the job. I've seen some similar problems with macros to detect iPhone 6 and iPhone 6 plus. So it would be a better idea to try out the answer from @Ohhmee

EDIT: Of course there probably is a solution detecting it with macros. But I don't know that and I can't find a solution so i'm suggesting a different approach.

Answer 4

Your macros are ridiculous and seem to indicate a fear of floating-point arithmetic.

#define IS_IPHONE_5      ([UIScreen mainScreen].bounds.size.height == 568)
#define IS_IPHONE_6      ([UIScreen mainScreen].bounds.size.height == 667)
#define IS_IPHONE_6_PLUS ([UIScreen mainScreen].bounds.size.height == 736)

will work just as good (or just as bad). Most likely they will work just as bad.

If you are interested in features of the iPhone 6 or 6+, check for the features, not the screen size. It is quite likely that Apple will soon have a 4" phone with all the iPhone 6 features. Or a cheap 6c with a big screen but without iPhone 6 features.

For user interface and so on, just take the mainScreen bounds and lay out your views accordingly. At this point, hard coding for fixed sizes is absolutely ridiculous and will bite you. You should be able to run for example on a 12" iPad with a split screen without problems, and heavens knows what screen size that will be.