iPhone SE2适配

判断型号

#import <sys/utsname.h>
struct utsname systemInfo; 
uname(&systemInfo); 
NSString * phoneType = [NSString stringWithCString: systemInfo.machine encoding:NSASCIIStringEncoding]; 
if ([phoneType isEqualToString:@"iPhone12,8"])  return @"iPhone SE2";

来源参考：https://stackoverflow.com/questions/26028918/how-to-determine-the-current-iphone-device-model

设计规范

SE2的UI设计规范可以参考 iPhone 8
设计参考规范： http://www.xueui.cn/design/142395.html