改更新获取当前机器型号了，iPhone12已经出来了

[Arise903]

/**

• 获取当前机器型号
• @return 当前机器型号名称
• 需要导入框架 #include <sys/types.h>和#include <sys/sysctl.h>
  */

• (NSString *)tf_code_pre(currentDeviceModel){
  int mib[2];
  size_t len;
  char *machine;

  mib[0] = CTL_HW;
  mib[1] = HW_MACHINE;
  sysctl(mib, 2, NULL, &len, NULL, 0);
  machine = malloc(len);
  sysctl(mib, 2, machine, &len, NULL, 0);

  NSString *platform = [NSString stringWithCString:machine encoding:NSASCIIStringEncoding];
  free(machine);

  //iphone
  if ([platform isEqualToString:@"iPhone1,1"]) return @"iPhone 2G (A1203)";
  if ([platform isEqualToString:@"iPhone1,2"]) return @"iPhone 3G (A1241/A1324)";
  if ([platform isEqualToString:@"iPhone2,1"]) return @"iPhone 3GS (A1303/A1325)";
  if ([platform isEqualToString:@"iPhone3,1"]) return @"iPhone 4 (A1332)";
  if ([platform isEqualToString:@"iPhone3,2"]) return @"iPhone 4 (A1332)";
  if ([platform isEqualToString:@"iPhone3,3"]) return @"iPhone 4 (A1349)";
  if ([platform isEqualToString:@"iPhone4,1"]) return @"iPhone 4S (A1387/A1431)";
  if ([platform isEqualToString:@"iPhone5,1"]) return @"iPhone 5 (A1428)";
  if ([platform isEqualToString:@"iPhone5,2"]) return @"iPhone 5 (A1429/A1442)";
  if ([platform isEqualToString:@"iPhone5,3"]) return @"iPhone 5c (A1456/A1532)";
  if ([platform isEqualToString:@"iPhone5,4"]) return @"iPhone 5c (A1507/A1516/A1526/A1529)";
  if ([platform isEqualToString:@"iPhone6,1"]) return @"iPhone 5s (A1453/A1533)";
  if ([platform isEqualToString:@"iPhone6,2"]) return @"iPhone 5s (A1457/A1518/A1528/A1530)";
  if ([platform isEqualToString:@"iPhone7,1"]) return @"iPhone 6 Plus (A1522/A1524)";
  if ([platform isEqualToString:@"iPhone7,2"]) return @"iPhone 6 (A1549/A1586)";

  if ([platform isEqualToString:@"iPhone8,1"]) return @"iPhone 6s";
  if ([platform isEqualToString:@"iPhone8,2"]) return @"iPhone 6s Plus";
  if ([platform isEqualToString:@"iPhone8,4"]) return @"iPhone SE";
  if ([platform isEqualToString:@"iPhone9,1"]) return @"iPhone 7";
  if ([platform isEqualToString:@"iPhone9,2"]) return @"iPhone 7 Plus";
  if ([platform isEqualToString:@"iPhone9,3"]) return @"iPhone 7";
  if ([platform isEqualToString:@"iPhone9,4"]) return @"iPhone 7 Plus";

  if ([platform isEqualToString:@"iPhone10,1"]) return @"iPhone 8 (A1863/A1906/A1907)"; // Global
  if ([platform isEqualToString:@"iPhone10,2"]) return @"iPhone 8 Plus (A1864/A1898/A1899)"; // Global
  if ([platform isEqualToString:@"iPhone10,3"]) return @"iPhone X (A1865/A1902)"; // Global
  if ([platform isEqualToString:@"iPhone10,4"]) return @"iPhone 8 (A1905)"; // GSM
  if ([platform isEqualToString:@"iPhone10,5"]) return @"iPhone 8 Plus (A1897)"; // GSM
  if ([platform isEqualToString:@"iPhone10,6"]) return @"iPhone X (A1901)"; // GSM
  if ([platform isEqualToString:@"iPhone11,2"]) return @"iPhone XS (A1920/A2097/A2098/A2100)";
  if ([platform isEqualToString:@"iPhone11,4"]) return @"iPhone XS Max";
  if ([platform isEqualToString:@"iPhone11,6"]) return @"iPhone XS Max (A1921/A2101/A2102/A2104)";
  if ([platform isEqualToString:@"iPhone11,8"]) return @"iPhone XR (A1984/A2105/A2106/A2108)";
  //2019年9月发布，更新三种机型：iPhone 11、iPhone 11 Pro、iPhone 11 Pro Max
  if ([platform isEqualToString:@"iPhone12,1"]) return @"iPhone 11";
  if ([platform isEqualToString:@"iPhone12,3"]) return @"iPhone 11 Pro";
  if ([platform isEqualToString:@"iPhone12,5"]) return @"iPhone 11 Pro Max";
  //2020年4月发布，更新一种机型：iPhone SE2
  if ([platform isEqualToString:@"iPhone12,8"]) return @"iPhone SE2";