iPhoneX推出已经有很长时间了，从最初的简单适配到前一段时间拿到真机开始做更优化的适配，我在部分地方用到了判断手机型号及系统版本的方法，下面分享一下。
首先需要导入头文件
#import <sys/utsname.h>
之后进行判断
struct utsname systemInfo;
uname(&systemInfo);
NSString*phoneType = [NSString stringWithCString: systemInfo.machine encoding:NSASCIIStringEncoding];
if([phoneType isEqualToString:@"iPhone1,1"]) return@"iPhone 2G";
if([phoneType isEqualToString:@"iPhone1,2"]) return@"iPhone 3G";
if([phoneType isEqualToString:@"iPhone2,1"]) return@"iPhone 3GS";
if([phoneType isEqualToString:@"iPhone3,1"]) return@"iPhone 4";
if([phoneType isEqualToString:@"iPhone3,2"]) return@"iPhone 4";
if([phoneType isEqualToString:@"iPhone3,3"]) return@"iPhone 4";
if([phoneType isEqualToString:@"iPhone4,1"]) return@"iPhone 4S";
if([phoneType isEqualToString:@"iPhone5,1"]) return@"iPhone 5";
if([phoneType isEqualToString:@"iPhone5,2"]) return@"iPhone 5";
if([phoneType isEqualToString:@"iPhone5,3"]) return@"iPhone 5c";
if([phoneType isEqualToString:@"iPhone5,4"]) return@"iPhone 5c";
if([phoneType isEqualToString:@"iPhone6,1"]) return@"iPhone 5s";
if([phoneType isEqualToString:@"iPhone6,2"]) return@"iPhone 5s";
if([phoneType isEqualToString:@"iPhone7,1"]) return@"iPhone 6 Plus";
if([phoneType isEqualToString:@"iPhone7,2"]) return@"iPhone 6";
if([phoneType isEqualToString:@"iPhone8,1"]) return@"iPhone 6s";
if([phoneType isEqualToString:@"iPhone8,2"]) return@"iPhone 6s Plus";
if([phoneType isEqualToString:@"iPhone8,4"]) return@"iPhone SE";
if([phoneType isEqualToString:@"iPhone9,1"]) return@"iPhone 7";
if([phoneType isEqualToString:@"iPhone9,2"]) return@"iPhone 7 Plus";
if([phoneType isEqualToString:@"iPhone10,1"]) return@"iPhone 8";
if([phoneType isEqualToString:@"iPhone10,4"]) return@"iPhone 8";
if([phoneType isEqualToString:@"iPhone10,2"]) return@"iPhone 8 Plus";
if([phoneType isEqualToString:@"iPhone10,5"]) return@"iPhone 8 Plus";
if([phoneType isEqualToString:@"iPhone10,3"]) return@"iPhone X";
if([phoneType isEqualToString:@"iPhone10,6"]) return@"iPhone X";
if([phoneType isEqualToString:@"iPhone11,8"]) return@"iPhone XR";
if([phoneType isEqualToString:@"iPhone11,2"]) return@"iPhone XS";
if([phoneType isEqualToString:@"iPhone11,4"]) return@"iPhone XS Max";
if([phoneType isEqualToString:@"iPhone11,6"]) return@"iPhone XS Max";
来源网站 https://www.theiphonewiki.com/wiki/Models
每个人的适配方法不同，我在开发中只需要判断iPhoneX。
判断手机系统版本，iOS 11以后有时候需要进行一下特别的修改
NSString* phoneVersion = [[UIDevice currentDevice] systemVersion];
或者
if (@available(iOS 11.0, *)) {
//
}
