导入头文件#import <sys/utsname.h>
+ (NSString *)deviceModelName {
struct utsname systemInfo;
uname(&systemInfo);
NSString *deviceModel = [NSString stringWithCString:systemInfo.machine encoding:NSUTF8StringEncoding];
if ([deviceModel isEqualToString:@"iPhone3,1"]) return @"iPhone 4";
if ([deviceModel isEqualToString:@"iPhone3,2"]) return @"iPhone 4";
if ([deviceModel isEqualToString:@"iPhone3,3"]) return @"iPhone 4";
if ([deviceModel isEqualToString:@"iPhone4,1"]) return @"iPhone 4S";
if ([deviceModel isEqualToString:@"iPhone5,1"]) return @"iPhone 5";
if ([deviceModel isEqualToString:@"iPhone5,2"]) return @"iPhone 5 (GSM+CDMA)";
if ([deviceModel isEqualToString:@"iPhone5,3"]) return @"iPhone 5c (GSM)";
if ([deviceModel isEqualToString:@"iPhone5,4"]) return @"iPhone 5c (GSM+CDMA)";
if ([deviceModel isEqualToString:@"iPhone6,1"]) return @"iPhone 5s (GSM)";