iOS判断屏幕是否有刘海,判断设备型号(已更新到iPhone12)

根据设备的型号model来判断

#import 
#import 

- (BOOL)isiPhoneX {
    static BOOL isiPhoneX = NO;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        
#if TARGET_IPHONE_SIMULATOR
        // 获取模拟器所对应的 device model
        NSString *model = NSProcessInfo.processInfo.environment[@"SIMULATOR_MODEL_IDENTIFIER"];
#else
        // 获取真机设备的 device model
        struct utsname systemInfo;
        uname(&systemInfo);
        NSString *model = [NSString stringWithCString:systemInfo.machine encoding:NSUTF8StringEncoding];
#endif
        // 判断 device model 是否为 "iPhone10,3" 和 "iPhone10,6" 或者以 "iPhone11," 开头
        // 如果是，就认为是 iPhone X
        isiPhoneX = [model isEqualToString:@"iPhone10,3"] || [model isEqualToString:@"iPhone10,6"] || [model hasPrefix:@"iPhone11,"]||[model isEqualToString:@"iPhone12,1"]||[model isEqualToString:@"iPhone12,3"]||[model isEqualToString:@"iPhone12,5"];
    });
    return isiPhoneX;
}

判断设备型号方法:
ipad可能不全,iPhone已完善

+ (NSString *)getCurrentDeviceModel{
    struct utsname systemInfo;
    uname(&systemInfo);
    
    NSString *deviceModel = @"iPhone";
    deviceModel = [NSString stringWithCString:systemInfo.machine encoding:NSASCIIStringEncoding];
    
    if ([deviceModel isEqualToString:@"iPhone3,1"])    return @"iPhone 4";
    else if ([deviceModel isEqualToString:@"iPhone3,2"])    return @"iPhone4";
    else if ([deviceModel isEqualToString:@"iPhone3,3"])    return @"iPhone4";
    else if ([deviceModel isEqualToString:@"iPhone4,1"])    return @"iPhone4S";
    else if ([deviceModel isEqualToString:@"iPhone5,1"])    return @"iPhone5";
    else if ([deviceModel isEqualToString:@"iPhone5,2"])    return @"iPhone5 (GSM+CDMA)";
    else if ([deviceModel isEqualToString:@"iPhone5,3"])    return @"iPhone5c (GSM)";
    else if ([deviceModel isEqualToString:@"iPhone5,4"])    return @"iPhone5c(GSM+CDMA)";
    else if ([deviceModel isEqualToString:@"iPhone6,1"])    return @"iPhone5s(GSM)";
    else if ([deviceModel isEqualToString:@"iPhone6,2"])    return @"iPhone5s(GSM+CDMA)";
    else if ([deviceModel isEqualToString:@"iPhone7,1"])    return @"iPhone6Plus";
    else if ([deviceModel isEqualToString:@"iPhone7,2"])    return @"iPhone6";
    else if ([deviceModel isEqualToString:@"iPhone8,1"])    return @"iPhone6s";
    else if ([deviceModel isEqualToString:@"iPhone8,2"])    return @"iPhone6sPlus";
    else if ([deviceModel isEqualToString:@"iPhone8,4"])    return @"iPhoneSE";
    // 日行两款手机型号均为日本独占，可能使用索尼FeliCa支付方案而不是苹果支付
    else if ([deviceModel isEqualToString:@"iPhone9,1"])    return @"iPhone7";
    else if ([deviceModel isEqualToString:@"iPhone9,2"])    return @"iPhone7Plus";
    else if ([deviceModel isEqualToString:@"iPhone9,3"])    return @"iPhone7";
    else if ([deviceModel isEqualToString:@"iPhone9,4"])    return @"iPhone7Plus";
    else if ([deviceModel isEqualToString:@"iPhone10,1"])   return @"iPhone_8";
    else if ([deviceModel isEqualToString:@"iPhone10,4"])   return @"iPhone_8";
    else if ([deviceModel isEqualToString:@"iPhone10,2"])   return @"iPhone_8_Plus";
    else if ([deviceModel isEqualToString:@"iPhone10,5"])   return @"iPhone_8_Plus";
    else if ([deviceModel isEqualToString:@"iPhone10,3"])   return @"iPhoneX";
    else if ([deviceModel isEqualToString:@"iPhone10,6"])   return @"iPhoneX";
    else if ([deviceModel isEqualToString:@"iPhone11,8"])   return @"iPhoneXR";
    else if ([deviceModel isEqualToString:@"iPhone11,2"])   return @"iPhoneXS";
    else if ([deviceModel isEqualToString:@"iPhone11,6"])   return @"iPhoneXSMax";
    else if ([deviceModel isEqualToString:@"iPhone11,4"])   return @"iPhoneXSMax";
    else if ([deviceModel isEqualToString:@"iPhone12,1"])   return @"iPhone 11";
    else if ([deviceModel isEqualToString:@"iPhone12,3"])   return @"iPhone11Pro";
    else if ([deviceModel isEqualToString:@"iPhone12,5"])   return @"iPhone 11 Pro Max";
    else if ([deviceModel isEqualToString:@"iPhone12,8"])   return @"iPhoneSE(2nd generation)";
    else if ([deviceModel isEqualToString:@"iPhone13,1"])   return @"iPhone 12 mini";
    else if ([deviceModel isEqualToString:@"iPhone13,2"])   return @"iPhone 12";
    else if ([deviceModel isEqualToString:@"iPhone13,3"])   return @"iPhone 12 Pro";
    else if ([deviceModel isEqualToString:@"iPhone13,4"])   return @"iPhone 12 Pro Max";
    else if ([deviceModel isEqualToString:@"iPod1,1"])      return @"iPodTouch1G";
    else if ([deviceModel isEqualToString:@"iPod2,1"])      return @"iPodTouch2G";
    else if ([deviceModel isEqualToString:@"iPod3,1"])      return @"iPodTouch3G";
    else if ([deviceModel isEqualToString:@"iPod4,1"])      return @"iPodTouch4G";
    else if ([deviceModel isEqualToString:@"iPod5,1"])      return @"iPodTouch(5 Gen)";
    else if ([deviceModel isEqualToString:@"iPad1,1"])      return @"iPad";
    else if ([deviceModel isEqualToString:@"iPad1,2"])      return @"iPad3G";
    else if ([deviceModel isEqualToString:@"iPad2,1"])      return @"iPad2(WiFi)";
    else if ([deviceModel isEqualToString:@"iPad2,2"])      return @"iPad2";
    else if ([deviceModel isEqualToString:@"iPad2,3"])      return @"iPad2(CDMA)";
    else if ([deviceModel isEqualToString:@"iPad2,4"])      return @"iPad2";
    else if ([deviceModel isEqualToString:@"iPad2,5"])      return @"iPadMini(WiFi)";
    else if ([deviceModel isEqualToString:@"iPad2,6"])      return @"iPadMini";
    else if ([deviceModel isEqualToString:@"iPad2,7"])      return @"iPad Mini (GSM+CDMA)";
    else if ([deviceModel isEqualToString:@"iPad3,1"])      return @"iPad 3 (WiFi)";
    else if ([deviceModel isEqualToString:@"iPad3,2"])      return @"iPad 3 (GSM+CDMA)";
    else if ([deviceModel isEqualToString:@"iPad3,3"])      return @"iPad 3";
    else if ([deviceModel isEqualToString:@"iPad3,4"])      return @"iPad 4 (WiFi)";
    else if ([deviceModel isEqualToString:@"iPad3,5"])      return @"iPad 4";
    else if ([deviceModel isEqualToString:@"iPad3,6"])      return @"iPad 4 (GSM+CDMA)";
    else if ([deviceModel isEqualToString:@"iPad4,1"])      return @"iPad Air (WiFi)";
    else if ([deviceModel isEqualToString:@"iPad4,2"])      return @"iPad Air (Cellular)";
    else if ([deviceModel isEqualToString:@"iPad4,4"])      return @"iPad Mini 2 (WiFi)";
    else if ([deviceModel isEqualToString:@"iPad4,5"])      return @"iPad Mini 2 (Cellular)";
    else if ([deviceModel isEqualToString:@"iPad4,6"])      return @"iPad Mini 2";
    else if ([deviceModel isEqualToString:@"iPad4,7"])      return @"iPad Mini 3";
    else if ([deviceModel isEqualToString:@"iPad4,8"])      return @"iPad Mini 3";
    else if ([deviceModel isEqualToString:@"iPad4,9"])      return @"iPad Mini 3";
    else if ([deviceModel isEqualToString:@"iPad5,1"])      return @"iPad Mini 4 (WiFi)";
    else if ([deviceModel isEqualToString:@"iPad5,2"])      return @"iPad Mini 4 (LTE)";
    else if ([deviceModel isEqualToString:@"iPad5,3"])      return @"iPad Air 2";
    else if ([deviceModel isEqualToString:@"iPad5,4"])      return @"iPad Air 2";
    else if ([deviceModel isEqualToString:@"iPad6,3"])      return @"iPad Pro 9.7";
    else if ([deviceModel isEqualToString:@"iPad6,4"])      return @"iPad Pro 9.7";
    else if ([deviceModel isEqualToString:@"iPad6,7"])      return @"iPad Pro 12.9";
    else if ([deviceModel isEqualToString:@"iPad6,8"])      return @"iPad Pro 12.9";
    
    else if ([deviceModel isEqualToString:@"AppleTV2,1"])      return @"Apple TV 2";
    else if ([deviceModel isEqualToString:@"AppleTV3,1"])      return @"Apple TV 3";
    else if ([deviceModel isEqualToString:@"AppleTV3,2"])      return @"Apple TV 3";
    else if ([deviceModel isEqualToString:@"AppleTV5,3"])      return @"Apple TV 4";
    
    else if ([deviceModel isEqualToString:@"i386"])         return @"Simulator";
    else if ([deviceModel isEqualToString:@"x86_64"])       return @"Simulator";
    return deviceModel;
}

要添加全请参考链接自己添加
https://www.theiphonewiki.com/wiki/Models