[ios] How to get device make and model on iOS?

A category for going getting away from the NSString description

In general, it is desirable to avoid arbitrary string comparisons throughout your code. It is better to update the strings in one place and hide the magic string from your app. I provide a category on UIDevice for that purpose.

For my specific needs I need to know which device I am using without the need to know specifics about networking capability that can be easily retrieved in other ways. So you will find a coarser grained enum than the ever growing list of devices.

Updating is a matter of adding the device to the enum and the lookup table.

UIDevice+NTNUExtensions.h

typedef NS_ENUM(NSUInteger, NTNUDeviceType) {
    DeviceAppleUnknown,
    DeviceAppleSimulator,
    DeviceAppleiPhone,
    DeviceAppleiPhone3G,
    DeviceAppleiPhone3GS,
    DeviceAppleiPhone4,
    DeviceAppleiPhone4S,
    DeviceAppleiPhone5,
    DeviceAppleiPhone5C,
    DeviceAppleiPhone5S,
    DeviceAppleiPhone6,
    DeviceAppleiPhone6_Plus,
    DeviceAppleiPhone6S,
    DeviceAppleiPhone6S_Plus,
    DeviceAppleiPhoneSE,
    DeviceAppleiPhone7,
    DeviceAppleiPhone7_Plus,
    DeviceAppleiPodTouch,
    DeviceAppleiPodTouch2G,
    DeviceAppleiPodTouch3G,
    DeviceAppleiPodTouch4G,
    DeviceAppleiPad,
    DeviceAppleiPad2,
    DeviceAppleiPad3G,
    DeviceAppleiPad4G,
    DeviceAppleiPad5G_Air,
    DeviceAppleiPadMini,
    DeviceAppleiPadMini2G,
    DeviceAppleiPadPro12,
    DeviceAppleiPadPro9
};



@interface UIDevice (NTNUExtensions)

- (NSString *)ntnu_deviceDescription;
- (NTNUDeviceType)ntnu_deviceType;

@end

UIDevice+NTNUExtensions.m

#import <sys/utsname.h>
#import "UIDevice+NTNUExtensions.h"

@implementation UIDevice (NTNUExtensions)

- (NSString *)ntnu_deviceDescription
{
    struct utsname systemInfo;
    uname(&systemInfo);

    return [NSString stringWithCString:systemInfo.machine encoding:NSUTF8StringEncoding];
}

- (NTNUDeviceType)ntnu_deviceType
{
    NSNumber *deviceType = [[self ntnu_deviceTypeLookupTable] objectForKey:[self ntnu_deviceDescription]];
    return [deviceType unsignedIntegerValue];
}

- (NSDictionary *)ntnu_deviceTypeLookupTable
{
    return @{
             @"i386": @(DeviceAppleSimulator),
             @"x86_64": @(DeviceAppleSimulator),
             @"iPod1,1": @(DeviceAppleiPodTouch),
             @"iPod2,1": @(DeviceAppleiPodTouch2G),
             @"iPod3,1": @(DeviceAppleiPodTouch3G),
             @"iPod4,1": @(DeviceAppleiPodTouch4G),
             @"iPhone1,1": @(DeviceAppleiPhone),
             @"iPhone1,2": @(DeviceAppleiPhone3G),
             @"iPhone2,1": @(DeviceAppleiPhone3GS),
             @"iPhone3,1": @(DeviceAppleiPhone4),
             @"iPhone3,3": @(DeviceAppleiPhone4),
             @"iPhone4,1": @(DeviceAppleiPhone4S),
             @"iPhone5,1": @(DeviceAppleiPhone5),
             @"iPhone5,2": @(DeviceAppleiPhone5),
             @"iPhone5,3": @(DeviceAppleiPhone5C),
             @"iPhone5,4": @(DeviceAppleiPhone5C),
             @"iPhone6,1": @(DeviceAppleiPhone5S),
             @"iPhone6,2": @(DeviceAppleiPhone5S),
             @"iPhone7,1": @(DeviceAppleiPhone6_Plus),
             @"iPhone7,2": @(DeviceAppleiPhone6),
             @"iPhone8,1" :@(DeviceAppleiPhone6S),
             @"iPhone8,2" :@(DeviceAppleiPhone6S_Plus),
             @"iPhone8,4" :@(DeviceAppleiPhoneSE),
             @"iPhone9,1" :@(DeviceAppleiPhone7),
             @"iPhone9,3" :@(DeviceAppleiPhone7),
             @"iPhone9,2" :@(DeviceAppleiPhone7_Plus),
             @"iPhone9,4" :@(DeviceAppleiPhone7_Plus),
             @"iPad1,1": @(DeviceAppleiPad),
             @"iPad2,1": @(DeviceAppleiPad2),
             @"iPad3,1": @(DeviceAppleiPad3G),
             @"iPad3,4": @(DeviceAppleiPad4G),
             @"iPad2,5": @(DeviceAppleiPadMini),
             @"iPad4,1": @(DeviceAppleiPad5G_Air),
             @"iPad4,2": @(DeviceAppleiPad5G_Air),
             @"iPad4,4": @(DeviceAppleiPadMini2G),
             @"iPad4,5": @(DeviceAppleiPadMini2G),
             @"iPad4,7":@(DeviceAppleiPadMini),
             @"iPad6,7":@(DeviceAppleiPadPro12),
             @"iPad6,8":@(DeviceAppleiPadPro12),
             @"iPad6,3":@(DeviceAppleiPadPro9),
             @"iPad6,4":@(DeviceAppleiPadPro9)
             };
}

@end