检测iPhone/iPod touch/iPad设备类型的代码

#import
#import

enum {
    MODEL_IPHONE_SIMULATOR,
    MODEL_IPOD_TOUCH,
    MODEL_IPHONE,
    MODEL_IPHONE_3G,
    MODEL_IPAD
};

@interface DeviceDetection : NSObject

+ (uint) detectDevice;

+ (NSString *) returnDeviceName:(BOOL)ignoreSimulator;
+ (BOOL) isIPodTouch;


@end


#import "DeviceDetection.h"

@implementation DeviceDetection

+ (BOOL) isIPodTouch
{
    int model = [DeviceDetection detectDevice];
    if (model == MODEL_IPOD_TOUCH || model == MODEL_IPAD){
        //|| model == MODEL_IPHONE_SIMULATOR){
        return YES;
    }   
    else {
        return NO;
    }

}



+ (uint) detectDevice {
    NSString *model= [[UIDevice currentDevice] model];
   
    // Some iPod Touch return "iPod Touch", others just "iPod"
   
    NSString *iPodTouch = @"iPod Touch";
    NSString *iPodTouchLowerCase = @"iPod touch";
    NSString *iPodTouchShort = @"iPod";
    NSString *iPad = @"iPad";
   
    NSString *iPhoneSimulator = @"iPhone Simulator";
   
    uint detected;
   
    if ([model compare:iPhoneSimulator] == NSOrderedSame) {
        // iPhone simulator
        detected = MODEL_IPHONE_SIMULATOR;
    }
    else if ([model compare:iPad] == NSOrderedSame) {
        // iPad
        detected = MODEL_IPAD;
    } else if ([model compare:iPodTouch] == NSOrderedSame) {
        // iPod Touch
        detected = MODEL_IPOD_TOUCH;
    } else if ([model compare:iPodTouchLowerCase] == NSOrderedSame) {
        // iPod Touch
        detected = MODEL_IPOD_TOUCH;
    } else if ([model compare:iPodTouchShort] == NSOrderedSame) {
        // iPod Touch
        detected = MODEL_IPOD_TOUCH;
    } else {
        // Could be an iPhone V1 or iPhone 3G (model should be "iPhone")
        struct utsname u;
       
        // u.machine could be "i386" for the simulator, "iPod1,1" on iPod Touch, "iPhone1,1" on iPhone V1 & "iPhone1,2" on iPhone3G
       
        uname(&u);
       
        if (!strcmp(u.machine, "iPhone1,1")) {
            detected = MODEL_IPHONE;
        } else {
            detected = MODEL_IPHONE_3G;
        }
    }
    return detected;
}

+ (NSString *) returnDeviceName:(BOOL)ignoreSimulator {
    NSString *returnValue = @"Unknown";
   
    switch ([DeviceDetection detectDevice]) {
        case MODEL_IPHONE_SIMULATOR:
            if (ignoreSimulator) {
                returnValue = @"iPhone 3G";
            } else {
                returnValue = @"iPhone Simulator";
            }
            break;
        case MODEL_IPOD_TOUCH:
            returnValue = @"iPod Touch";
            break;
        case MODEL_IPHONE:
            returnValue = @"iPhone";
            break;
        case MODEL_IPHONE_3G:
            returnValue = @"iPhone 3G";
            break;
        default:
            break;
    }
   
    return returnValue;
}

@end