ios判断当前设备类型

代码如下：

+ (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 1G";

if ([deviceString isEqualToString:@"iPhone1,2"])    return @"iPhone 3G";

if ([deviceString isEqualToString:@"iPhone2,1"])    return @"iPhone 3GS";

if ([deviceString isEqualToString:@"iPhone3,1"])    return @"iPhone 4";

if ([deviceString isEqualToString:@"iPhone3,2"])    return @"Verizon iPhone 4";

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

if ([deviceString isEqualToString:@"iPhone5,2"])    return @"iPhone 5";

if ([deviceString isEqualToString:@"iPhone5,3"])    return @"iPhone 5C";

if ([deviceString isEqualToString:@"iPhone5,4"])    return @"iPhone 5C";

if ([deviceString isEqualToString:@"iPhone6,2"])    return @"iPhone 5S";

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

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

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

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

if ([deviceString isEqualToString:@"iPad1,1"])      return @"iPad";

if ([deviceString isEqualToString:@"iPad2,1"])      return @"iPad 2 (WiFi)";

if ([deviceString isEqualToString:@"iPad2,2"])      return @"iPad 2 (GSM)";

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

if ([deviceString isEqualToString:@"iPad2,5"])      return @"iPad mini";

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

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

NSLog(@"NOTE: Unknown device type: %@", deviceString);

return deviceString;

}