iOS 判断设备型号

+ (NSString*)deviceString
{
    // 需要#import "sys/utsname.h"
    struct utsname systemInfo;
    uname(&systemInfo);
    NSString *deviceString = [NSString stringWithCString:systemInfo.machine encoding:NSUTF8StringEncoding];
    
    if ([deviceString isEqualToString:@"iPhone1,1"]) return @"iPhone 2G (A1203)";
    if ([deviceString isEqualToString:@"iPhone1,2"]) return @"iPhone 3G (A1241/A1324)";
    if ([deviceString isEqualToString:@"iPhone2,1"]) return @"iPhone 3GS (A1303/A1325)";
    if ([deviceString isEqualToString:@"iPhone3,1"]) return @"iPhone 4 (A1332)";
    if ([deviceString isEqualToString:@"iPhone3,2"]) return @"iPhone 4 (A1332)";
    if ([deviceString isEqualToString:@"iPhone3,3"]) return @"iPhone 4 (A1349)";
    if ([deviceString isEqualToString:@"iPhone4,1"]) return @"iPhone 4S (A1387/A1431)";
    if ([deviceString isEqualToString:@"iPhone5,1"]) return @"iPhone 5 (A1428)";
    if ([deviceString isEqualToString:@"iPhone5,2"]) return @"iPhone 5 (A1429/A1442)";
    if ([deviceString isEqualToString:@"iPhone5,3"]) return @"iPhone 5c (A1456/A1532)";
    if ([deviceString isEqualToString:@"iPhone5,4"]) return @"iPhone 5c (A1507/A1516/A1526/A1529)";
    if ([deviceString isEqualToString:@"iPhone6,1"]) return @"iPhone 5s (A1453/A1533)";
    if ([deviceString isEqualToString:@"iPhone6,2"]) return @"iPhone 5s (A1457/A1518/A1528/A1530)";
    if ([deviceString isEqualToString:@"iPhone7,1"]) return @"iPhone 6 Plus (A1522/A1524)";
    if ([deviceString isEqualToString:@"iPhone7,2"]) return @"iPhone 6 (A1549/A1586)";
    if ([deviceString isEqualToString:@"iPhone8,1"])   return @"iPhone 6S";
    if ([deviceString isEqualToString:@"iPhone8,2"])   return @"iPhone 6S Plus";
    
    if ([deviceString isEqualToString:@"iPhone8,4"]) return @"iPhone SE";
    
    if ([deviceString isEqualToString:@"iPhone9,1"]) return @"iPhone 7";
    
    if ([deviceString isEqualToString:@"iPhone9,2"]) return @"iPhone 7 Plus";
    

    
    if ([deviceString isEqualToString:@"iPod1,1"])   return @"iPod Touch 1G (A1213)";
    if ([deviceString isEqualToString:@"iPod2,1"])   return @"iPod Touch 2G (A1288)";
    if ([deviceString isEqualToString:@"iPod3,1"])   return @"iPod Touch 3G (A1318)";
    if ([deviceString isEqualToString:@"iPod4,1"])   return @"iPod Touch 4G (A1367)";
    if ([deviceString isEqualToString:@"iPod5,1"])   return @"iPod Touch 5G (A1421/A1509)";
    
    if ([deviceString isEqualToString:@"iPad1,1"])   return @"iPad 1G (A1219/A1337)";
    
    if ([deviceString isEqualToString:@"iPad2,1"])   return @"iPad 2 (A1395)";
    if ([deviceString isEqualToString:@"iPad2,2"])   return @"iPad 2 (A1396)";
    if ([deviceString isEqualToString:@"iPad2,3"])   return @"iPad 2 (A1397)";
    if ([deviceString isEqualToString:@"iPad2,4"])   return @"iPad 2 (A1395+New Chip)";
    if ([deviceString isEqualToString:@"iPad2,5"])   return @"iPad Mini 1G (A1432)";
    if ([deviceString isEqualToString:@"iPad2,6"])   return @"iPad Mini 1G (A1454)";
    if ([deviceString isEqualToString:@"iPad2,7"])   return @"iPad Mini 1G (A1455)";
    
    if ([deviceString isEqualToString:@"iPad3,1"])   return @"iPad 3 (A1416)";
    if ([deviceString isEqualToString:@"iPad3,2"])   return @"iPad 3 (A1403)";
    if ([deviceString isEqualToString:@"iPad3,3"])   return @"iPad 3 (A1430)";
    if ([deviceString isEqualToString:@"iPad3,4"])   return @"iPad 4 (A1458)";
    if ([deviceString isEqualToString:@"iPad3,5"])   return @"iPad 4 (A1459)";
    if ([deviceString isEqualToString:@"iPad3,6"])   return @"iPad 4 (A1460)";
    
    if ([deviceString isEqualToString:@"iPad4,1"])   return @"iPad Air (A1474)";
    if ([deviceString isEqualToString:@"iPad4,2"])   return @"iPad Air (A1475)";
    if ([deviceString isEqualToString:@"iPad4,3"])   return @"iPad Air (A1476)";
    if ([deviceString isEqualToString:@"iPad4,4"])   return @"iPad Mini 2G (A1489)";
    if ([deviceString isEqualToString:@"iPad4,5"])   return @"iPad Mini 2G (A1490)";
    if ([deviceString isEqualToString:@"iPad4,6"])   return @"iPad Mini 2G (A1491)";
    
    if ([deviceString isEqualToString:@"i386"])      return @"iPhone Simulator";
    if ([deviceString isEqualToString:@"x86_64"])    return @"iPhone Simulator";
    return deviceString;
}