- (NSString*)deviceString

{

    // 需要#import "sys/utsname.h"

    struct utsname systemInfo;

    uname(&systemInfo);

    NSString *platform = [NSString stringWithCString:systemInfo.machine encoding:NSUTF8StringEncoding];


    if ([platform isEqualToString:@"iPhone1,1"])    return @"iPhone 2G";

    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:@"iPhone3,2"])    return @"iPhone 4";

    if ([platform isEqualToString:@"iPhone3,3"])    return @"iPhone 4 (CDMA)";

    if ([platform isEqualToString:@"iPhone4,1"])    return @"iPhone 4S";

    if ([platform isEqualToString:@"iPhone5,1"])    return @"iPhone 5";

    if ([platform isEqualToString:@"iPhone5,2"])    return @"iPhone 5 (GSM+CDMA)";

    

    if ([platform isEqualToString:@"iPod1,1"])      return @"iPod Touch (1 Gen)";

    if ([platform isEqualToString:@"iPod2,1"])      return @"iPod Touch (2 Gen)";

    if ([platform isEqualToString:@"iPod3,1"])      return @"iPod Touch (3 Gen)";

    if ([platform isEqualToString:@"iPod4,1"])      return @"iPod Touch (4 Gen)";

    if ([platform isEqualToString:@"iPod5,1"])      return @"iPod Touch (5 Gen)";

    

    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";

    if ([platform isEqualToString:@"iPad2,3"])      return @"iPad 2 (CDMA)";

    if ([platform isEqualToString:@"iPad2,4"])      return @"iPad 2";

    if ([platform isEqualToString:@"iPad2,5"])      return @"iPad Mini (WiFi)";

    if ([platform isEqualToString:@"iPad2,6"])      return @"iPad Mini";

    if ([platform isEqualToString:@"iPad2,7"])      return @"iPad Mini (GSM+CDMA)";

    if ([platform isEqualToString:@"iPad3,1"])      return @"iPad 3 (WiFi)";

    if ([platform isEqualToString:@"iPad3,2"])      return @"iPad 3 (GSM+CDMA)";

    if ([platform isEqualToString:@"iPad3,3"])      return @"iPad 3";

    if ([platform isEqualToString:@"iPad3,4"])      return @"iPad 4 (WiFi)";

    if ([platform isEqualToString:@"iPad3,5"])      return @"iPad 4";

    if ([platform isEqualToString:@"iPad3,6"])      return @"iPad 4 (GSM+CDMA)";

    

    if ([platform isEqualToString:@"i386"])         return @"Simulator";

    if ([platform isEqualToString:@"x86_64"])       return @"Simulator";

    

    return platform;

}