How to Detect Whether I Have iPhone 2G,3G,3Gs

How do I detect whether I have iPhone 2G,3G,3GS

Whether you are on an iPhone or a iPod Touch:

UIDevice *device = [UIDevice currentDevice];
NSString *systemName = [device systemName];

To detect the version of the OS:

UIDevice *device = [UIDevice currentDevice];
NSString *systemVersion = [device systemVersion];

To detect a specific model, you would need to test for some capability that only that model has, so to detect an iPhone 3GS, check for a video capability on the camera:

#define SOURCETYPE UIImagePickerControllerSourceTypeCamera

// does the device have a camera?
if ([UIImagePickerController isSourceTypeAvailable:SOURCETYPE]) {
  // if so, does that camera support video?
  NSArray *mediaTypes = [UIImagePickerController availableMediaTypesForSourceType:SOURCETYPE];
  bool isA3GS = [mediaTypes containsObject:kUTTypeMovie];
}

Detect iPhone 3G or 3GS (and iPod touch 2G vs iPod touch 3G) in JavaScript

If number crunching would be a discriminator... use it! Just benchmark a small loop (call it BogoMips) and within some 0.5 seconds you know what you are up to.

The hardware and software are defined, the load is pretty much defined (well.. iOS 4 'multitasking'?), so I think it can be very accurate.

edit I only read your remarks on performance testing now; maybe you meant this exactly, maybe you meant to measure page render time. My suggestion is to have a page with only a piece of javascript which then stores the result as a cookie and redirects. Pretty much all circumstances are known then.

Detect iPhone 3G in iOS

You can find the exact model string using this post (which I think is also a duplicate question):

#include <sys/types.h>
#include <sys/sysctl.h>

@implementation UIDevice (Hardware)

/*
 Platforms
 iPhone1,1 -> iPhone 1G
 iPhone1,2 -> iPhone 3G 
 iPod1,1   -> iPod touch 1G 
 iPod2,1   -> iPod touch 2G 
*/

-(NSString *) platform
{
  size_t size;
  sysctlbyname("hw.machine", NULL, &size, NULL, 0);
  char *machine = malloc(size);
  sysctlbyname("hw.machine", machine, &size, NULL, 0);
  NSString *platform = [NSString stringWithCString:machine encoding:NSUTF8StringEncoding];
  free(machine);
 return platform;
}

iPhone - How do I detect the iPhone version?

feel free to use this class - I found it here

Usage

UIDeviceHardware *h=[[UIDeviceHardware alloc] init];
[self setDeviceModel:[h platformString]];   
[h release];

UIDeviceHardware.h

//
//  UIDeviceHardware.h
//
//  Used to determine EXACT version of device software is running on.

#import <Foundation/Foundation.h>

@interface UIDeviceHardware : NSObject 

- (NSString *) platform;
- (NSString *) platformString;

@end

UIDeviceHardware.m

//
//  UIDeviceHardware.m
//
//  Used to determine EXACT version of device software is running on.

#import "UIDeviceHardware.h"
#include <sys/types.h>
#include <sys/sysctl.h>

@implementation UIDeviceHardware

- (NSString *) platform{
    size_t size;
    sysctlbyname("hw.machine", NULL, &size, NULL, 0);
    char *machine = malloc(size);
    sysctlbyname("hw.machine", machine, &size, NULL, 0);
    NSString *platform = [NSString stringWithCString:machine];
    free(machine);
    return platform;
}

- (NSString *) platformString{
    NSString *platform = [self platform];
    if ([platform isEqualToString:@"iPhone1,1"]) return @"iPhone 1G";
    if ([platform isEqualToString:@"iPhone1,2"]) return @"iPhone 3G";
    if ([platform isEqualToString:@"iPhone2,1"]) return @"iPhone 3GS";
    if ([platform isEqualToString:@"iPod1,1"])   return @"iPod Touch 1G";
    if ([platform isEqualToString:@"iPod2,1"])   return @"iPod Touch 2G";
    if ([platform isEqualToString:@"i386"])   return @"iPhone Simulator";
    return platform;
}

@end

Distinguish iPhone 3G from iPhone 3GS

The best way to check is to use sysctlbyname("hw.machine", ...) as per How to tell if your code is running on an iPhone or an iPhone3G?

The returned result for 3GS should be "iPhone2,1"

Determining the type of an iOS device in Xcode

- (NSString *) IphoneModel {
    size_t size;
    sysctlbyname("hw.machine", NULL, &size, NULL, 0);
    char *machine = (char*)malloc(size);
    sysctlbyname("hw.machine", machine, &size, NULL, 0);
    NSString *platform = [NSString stringWithCString:machine encoding: NSUTF8StringEncoding];
    free(machine);

    if ([platform isEqualToString:@"iPhone1,1"])    return @"iPhone 1G";
    if ([platform isEqualToString:@"iPhone1,2"])    return @"iPhone 3G";
    if ([platform isEqualToString:@"iPhone2,1"])    return @"iPhone 3GS";
    if ([platform isEqualToString:@"iPhone3,1"])    return @"iPhone 4";
    if ([platform isEqualToString:@"iPhone3,3"])    return @"Verizon iPhone 4";
    if ([platform isEqualToString:@"iPhone4,1"])    return @"iPhone 4S";
    if ([platform isEqualToString:@"iPod1,1"])      return @"iPod Touch 1G";
    if ([platform isEqualToString:@"iPod2,1"])      return @"iPod Touch 2G";
    if ([platform isEqualToString:@"iPod3,1"])      return @"iPod Touch 3G";
    if ([platform isEqualToString:@"iPod4,1"])      return @"iPod Touch 4G";
    if ([platform isEqualToString:@"iPad1,1"])      return @"iPad";
    if ([platform isEqualToString:@"iPad1,2"])      return @"iPad (3G)";
    if ([platform isEqualToString:@"iPad2,1"])      return @"iPad 2 (WiFi)";
    if ([platform isEqualToString:@"iPad2,2"])      return @"iPad 2 (GSM)";
    if ([platform isEqualToString:@"iPad2,3"])      return @"iPad 2 (CDMA)";
    if ([platform isEqualToString:@"iPad3,1"])      return @"iPad 3 (WiFi)";
    if ([platform isEqualToString:@"iPad3,2"])      return @"iPad 3 (GSM)";
    if ([platform isEqualToString:@"iPad3,3"])      return @"iPad 3 (CDMA)";
    if ([platform isEqualToString:@"i386"])         return @"Simulator";

    return platform;
}

Find iPhone Model information

Try:

char    deviceString[256];
size_t  size = 255;
sysctlbyname("hw.machine", NULL, &size, NULL, 0);
if (size > 255) { size = 255; }
sysctlbyname("hw.machine", deviceString, &size, NULL, 0);
if (strcmp(deviceString,"iPhone1,1") == 0) { etc... }  // 2G

1,2 is a 3G,
2,1 is a 3GS,
3,1 is an i4, etc.

Target iPhone application by model (e.g. 3G vs 3GS)

There is no way to do it, except in code. Apple discourages it, instead asking you to require specific features instead of specific models.

The best you can do is note in the product description that not all features are available/performant on the 3G hardware, for example, and then disable those features in code or let them run poorly.

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